php-sql-parser sql防注入脚本
<?php /**
* SQL Parser from: http://code.google.com/p/php-sql-parser/
* License: New BSD
*/
class PHPSQLParser
{
var $reserved = array();
var $functions = array();
function __construct($sql = false) {
#LOAD THE LIST OF RESERVED WORDS
$this->load_reserved_words();
if($sql) $this->parse($sql);
} function parse($sql) {
$sql = trim($sql); #lex the SQL statement
$in = $this->split_sql($sql); #sometimes the parser needs to skip ahead until a particular
#token is found
$skip_until = false; #this is the output tree which is being parsed
$out = array(); #This is the last type of union used (UNION or UNION ALL)
#indicates a) presence of at least one union in this query
# b) the type of union if this is the first or last query
$union = false; #Sometimes a "query" consists of more than one query (like a UNION query)
#this array holds all the queries
$queries=array(); #This is the highest level lexical analysis. This is the part of the
#code which finds UNION and UNION ALL query parts
foreach($in as $key => $token) {
$token=trim($token); if($skip_until) {
if($token) {
if(strtoupper($token) == $skip_until) {
$skip_until = false;
continue;
}
} else {
continue;
}
} if(strtoupper($token) == "UNION") {
$union = 'UNION';
for($i=$key+1;$i<count($in);++$i) {
if(trim($in[$i]) == '') continue;
if(strtoupper($in[$i]) == 'ALL') {
$skip_until = 'ALL';
$union = 'UNION ALL';
continue ;
} else {
break;
}
} $queries[$union][] = $out;
$out = array(); } else {
$out[]=$token;
} } if(!empty($out)) {
if ($union) {
$queries[$union][] = $out;
} else {
$queries[] = $out;
}
} /*MySQL supports a special form of UNION:
(select ...)
union
(select ...) This block handles this query syntax. Only one such subquery
is supported in each UNION block. (select)(select)union(select) is not legal.
The extra queries will be silently ignored.
*/
$union_types = array('UNION','UNION ALL');
foreach($union_types as $union_type) {
if(!empty($queries[$union_type])) {
foreach($queries[$union_type] as $i => $tok_list) {
foreach($tok_list as $z => $tok) {
$tok = trim($tok);
if(!$tok) continue;
if(preg_match('/^\\(\\s*select\\s*/i', $tok)) {
$queries[$union_type][$i] = $this->parse(substr($tok,1,-1));
break;
} else {
$queries[$union_type][$i] = $this->process_sql($queries[$union_type][$i]);
break;
}
}
}
}
} /* If there was no UNION or UNION ALL in the query, then the query is
stored at $queries[0].
*/
if(!empty($queries[0])) {
$queries[0] = $this->process_sql($queries[0]); } if(count($queries) == 1 && !$union) {
$queries = $queries[0];
} $this->parsed = $queries;
return $this->parsed;
} #This function counts open and close parenthesis and
#returns their location. This might be faster as a regex
private function count_paren($token,$chars=array('(',')')) {
$len = strlen($token);
$open=array();
$close=array();
for($i=0;$i<$len;++$i){
if($token[$i] == $chars[0]) {
$open[] = $i;
} elseif($token[$i] == $chars[1]) {
$close[] = $i;
} }
return array('open' => $open, 'close' => $close, 'balanced' =>( count($close) - count($open)));
} #This function counts open and close parenthesis and
#returns their location. This might be faster as a regex
private function count_backtick($token) {
$len = strlen($token);
$cnt=0;
for($i=0;$i<$len;++$i){
if($token[$i] == '`') ++$cnt;
}
return $cnt;
} #This is the lexer
#this function splits up a SQL statement into easy to "parse"
#tokens for the SQL processor
private function split_sql($sql) { if(!is_string($sql)) {
return false;
} $sql = str_replace(array('\\\'','\\"',"\r\n","\n","()"),array("''",'""'," "," "," "), $sql);
$regex=<<<EOREGEX
/(`(?:[^`]|``)`|[@A-Za-z0-9_.`-]+(?:\(\s*\)){0,1})
|(\+|-|\*|\/|!=|>=|<=|<>|>|<|&&|\|\||=|\^)
|(\(.*?\)) # Match FUNCTION(...) OR BAREWORDS
|('(?:[^']|'')*'+)
|("(?:[^"]|"")*"+)
|([^ ,]+)
/ix
EOREGEX
; $tokens = preg_split($regex, $sql,-1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
$token_count = count($tokens); /* The above regex has one problem, because the parenthetical match is not greedy.
Thus, when matching grouped expressions such as ( (a and b) or c) the
tokenizer will produce "( (a and b)", " ", "or", " " , "c,")" This block detects the number of open/close parentheses in the given token. If the parentheses are balanced
(balanced == 0) then we don't need to do anything. otherwise, we need to balance the expression.
*/
$reset = false;
for($i=0;$i<$token_count;++$i) { if(empty($tokens[$i])) continue; $token = $tokens[$i];
$trim = trim($token);
if($trim) {
if($trim[0] != '('
&& substr($trim,-1) == ')') {
$trim=trim(substr($trim,0,
strpos($trim,'(')));
}
$tokens[$i]=$trim;
$token=$trim;
} if($token && $token[0] == '(') {
$info = $this->count_paren($token);
if($info['balanced'] == 0) {
continue;
} // We need to find this many closing parentheses.
$needed = abs($info['balanced']);
$n = $i;
while($needed > 0 && $n <$token_count-1) {
++$n;
#echo "LOOKING FORWARD TO $n [ " . $tokens[$n] . "]\n";
$token2 = $tokens[$n];
$info2 = $this->count_paren($token2);
$closes = count($info2['close']);
if($closes != $needed) {
$tokens[$i] .= $tokens[$n];
unset($tokens[$n]);
$reset = true;
$info2 = $this->count_paren($tokens[$i]);
$needed = abs($info2['balanced']);
# echo "CLOSES LESS THAN NEEDED (still need $needed)\n";
} else {
/*get the string pos of the last close parenthesis we need*/
$pos = $info2['close'][count($info2['close'])-1];
$str1 = $str2 = "";
if($pos == 0) {
$str1 = ')';
} else {
$str1 = substr($tokens[$n],0,$pos) . ')';
$str2 = substr($tokens[$n],$pos+1);
}
#echo "CLOSES FOUND AT $n, offset:$pos [$str1] [$str2]\n";
if(strlen($str2) > 0) {
$tokens[$n] = $str2;
} else {
unset($tokens[$n]);
$reset = true;
}
$tokens[$i] .= $str1;
$info2 = $this->count_paren($tokens[$i]);
$needed = abs($info2['balanced']); }
}
}
} #the same problem appears with backticks :( /* reset the array if we deleted any tokens above */
if ($reset) $tokens = array_values($tokens); $token_count=count($tokens);
for($i=0;$i<$token_count;++$i) {
if(empty($tokens[$i])) continue;
$token=$tokens[$i];
$needed=true;
$reset=false;
if($needed && $token && strpos($token,'`') !== false) {
$info = $this->count_backtick($token);
if($info %2 == 0) { #even number of backticks means we are balanced
continue;
}
$needed=1; $n = $i;
while($needed && $n <$token_count-1) {
$reset=true;
#echo "BACKTICK COUNT[$i]: $info old: {$tokens[$i]}, new: ($token)\n";
++$n;
$token .= $tokens[$n];
unset($tokens[$n]);
$needed = $this->count_backtick($token) % 2;
}
}
if($reset) $tokens[$i] = $token; }
/* reset the array if we deleted any tokens above */
$tokens = array_values($tokens); return $tokens; } /* This function breaks up the SQL statement into logical sections.
Some sections are then further handled by specialized functions.
*/
private function process_sql(&$tokens,$start_at = 0, $stop_at = false) {
$prev_category = "";
$start = microtime(true);
$token_category = ""; $skip_next=false;
$token_count = count($tokens); if(!$stop_at) {
$stop_at = $token_count;
} $out = false; for($token_number = $start_at;$token_number<$stop_at;++$token_number) {
$token = trim($tokens[$token_number]);
if($token && $token[0] == '(' && $token_category == "") {
$token_category = 'SELECT';
} /* If it isn't obvious, when $skip_next is set, then we ignore the next real
token, that is we ignore whitespace.
*/
if($skip_next) {
#whitespace does not count as a next token
if($token == "") {
continue;
} #to skip the token we replace it with whitespace
$new_token = "";
$skip_next = false;
} $upper = strtoupper($token);
switch($upper) { /* Tokens that get their own sections. These keywords have subclauses. */
case 'SELECT':
case 'ORDER':
case 'LIMIT':
case 'SET':
case 'DUPLICATE':
case 'VALUES':
case 'GROUP':
case 'ORDER':
case 'HAVING':
case 'INTO':
case 'WHERE':
case 'RENAME':
case 'CALL':
case 'PROCEDURE':
case 'FUNCTION':
case 'DATABASE':
case 'SERVER':
case 'LOGFILE':
case 'DEFINER':
case 'RETURNS':
case 'EVENT':
case 'TABLESPACE':
case 'VIEW':
case 'TRIGGER':
case 'DATA':
case 'DO':
case 'PASSWORD':
case 'USER':
case 'PLUGIN':
case 'FROM':
case 'FLUSH':
case 'KILL':
case 'RESET':
case 'START':
case 'STOP':
case 'PURGE':
case 'EXECUTE':
case 'PREPARE':
case 'DEALLOCATE':
if($token == 'DEALLOCATE') {
$skip_next = true;
}
/* this FROM is different from FROM in other DML (not join related) */
if($token_category == 'PREPARE' && $upper == 'FROM') {
continue 2;
} $token_category = $upper;
#$join_type = 'JOIN';
if($upper == 'FROM' && $token_category == 'FROM') {
/* DO NOTHING*/
} else {
continue 2; }
break; /* These tokens get their own section, but have no subclauses.
These tokens identify the statement but have no specific subclauses of their own. */
case 'DELETE':
case 'ALTER':
case 'INSERT':
case 'REPLACE':
case 'TRUNCATE':
case 'CREATE':
case 'TRUNCATE':
case 'OPTIMIZE':
case 'GRANT':
case 'REVOKE':
case 'SHOW':
case 'HANDLER':
case 'LOAD':
case 'ROLLBACK':
case 'SAVEPOINT':
case 'UNLOCK':
case 'INSTALL':
case 'UNINSTALL':
case 'ANALZYE':
case 'BACKUP':
case 'CHECK':
case 'CHECKSUM':
case 'REPAIR':
case 'RESTORE':
case 'CACHE':
case 'DESCRIBE':
case 'EXPLAIN':
case 'USE':
case 'HELP':
$token_category = $upper; /* set the category in case these get subclauses
in a future version of MySQL */
$out[$upper][0] = $upper;
continue 2;
break; /* This is either LOCK TABLES or SELECT ... LOCK IN SHARE MODE*/
case 'LOCK':
if($token_category == "") {
$token_category = $upper;
$out[$upper][0] = $upper;
} else {
$token = 'LOCK IN SHARE MODE';
$skip_next=true;
$out['OPTIONS'][] = $token;
}
continue 2;
break; case 'USING':
/* USING in FROM clause is different from USING w/ prepared statement*/
if($token_category == 'EXECUTE') {
$token_category=$upper;
continue 2;
}
if($token_category == 'FROM' && !empty($out['DELETE'])) {
$token_category=$upper;
continue 2;
}
break; /* DROP TABLE is different from ALTER TABLE DROP ... */
case 'DROP':
if($token_category != 'ALTER') {
$token_category = $upper;
$out[$upper][0] = $upper;
continue 2;
}
break; case 'FOR':
$skip_next=true;
$out['OPTIONS'][] = 'FOR UPDATE';
continue 2;
break; case 'UPDATE':
if($token_category == "" ) {
$token_category = $upper;
continue 2; }
if($token_category == 'DUPLICATE') {
continue 2;
}
break;
break; case 'START':
$token = "BEGIN";
$out[$upper][0] = $upper;
$skip_next = true;
break; /* These tokens are ignored. */
case 'BY':
case 'ALL':
case 'SHARE':
case 'MODE':
case 'TO': case ';':
continue 2;
break; case 'KEY':
if($token_category == 'DUPLICATE') {
continue 2;
}
break; /* These tokens set particular options for the statement. They never stand alone.*/
case 'DISTINCTROW':
$token='DISTINCT';
case 'DISTINCT':
case 'HIGH_PRIORITY':
case 'LOW_PRIORITY':
case 'DELAYED':
case 'IGNORE':
case 'FORCE':
case 'STRAIGHT_JOIN':
case 'SQL_SMALL_RESULT':
case 'SQL_BIG_RESULT':
case 'QUICK':
case 'SQL_BUFFER_RESULT':
case 'SQL_CACHE':
case 'SQL_NO_CACHE':
case 'SQL_CALC_FOUND_ROWS':
$out['OPTIONS'][] = $upper;
continue 2;
break; case 'WITH':
if($token_category == 'GROUP') {
$skip_next=true;
$out['OPTIONS'][] = 'WITH ROLLUP';
continue 2;
}
break; case 'AS':
break; case '':
case ',':
case ';':
break; default:
break;
} if($prev_category == $token_category) {
$out[$token_category][] = $token;
} $prev_category = $token_category;
} if(!$out) return false; #process the SELECT clause
if(!empty($out['SELECT'])) $out['SELECT'] = $this->process_select($out['SELECT']); if(!empty($out['FROM'])) $out['FROM'] = $this->process_from($out['FROM']);
if(!empty($out['USING'])) $out['USING'] = $this->process_from($out['USING']);
if(!empty($out['UPDATE'])) $out['UPDATE'] = $this->process_from($out['UPDATE']); if(!empty($out['GROUP'])) $out['GROUP'] = $this->process_group($out['GROUP'], $out['SELECT']);
if(!empty($out['ORDER'])) $out['ORDER'] = $this->process_group($out['ORDER'], $out['SELECT']); if(!empty($out['LIMIT'])) $out['LIMIT'] = $this->process_limit($out['LIMIT']); if(!empty($out['WHERE'])) $out['WHERE'] = $this->process_expr_list($out['WHERE']);
if(!empty($out['HAVING'])) $out['HAVING'] = $this->process_expr_list($out['HAVING']);
if(!empty($out['SET'])) $out['SET'] = $this->process_set_list($out['SET']);
if(!empty($out['DUPLICATE'])) {
$out['ON DUPLICATE KEY UPDATE'] = $this->process_set_list($out['DUPLICATE']);
unset($out['DUPLICATE']);
}
if(!empty($out['INSERT'])) $out = $this->process_insert($out);
if(!empty($out['REPLACE'])) $out = $this->process_insert($out,'REPLACE');
if(!empty($out['DELETE'])) $out = $this->process_delete($out); return $out; } /* A SET list is simply a list of key = value expressions separated by comma (,).
This function produces a list of the key/value expressions.
*/
private function process_set_list($tokens) {
$column="";
$expression="";
foreach($tokens as $token) {
$token=trim($token);
if(!$column) {
if($token === false || empty($token)) continue;
$column .= $token;
continue;
} if($token == '=') continue; if($token == ',') {
$expr[] = array('column' => trim($column), 'expr' => trim($expression));
$expression = $column = "";
continue;
} $expression .= $token;
}
if($expression) {
$expr[] = array('column' => trim($column), 'expr' => trim($expression));
} return $expr;
} /* This function processes the LIMIT section.
start,end are set. If only end is provided in the query
then start is set to 0.
*/
private function process_limit($tokens) {
$start = 0;
$end = 0; if($pos = array_search(',',$tokens)) {
for($i=0;$i<$pos;++$i) {
if($tokens[$i] != '') {
$start = $tokens[$i];
break;
}
}
$pos = $pos + 1; } else {
$pos = 0;
} for($i=$pos;$i<count($tokens);++$i) {
if($tokens[$i] != '') {
$end = $tokens[$i];
break;
}
} return array('start' => $start, 'end' => $end);
} /* This function processes the SELECT section. It splits the clauses at the commas.
Each clause is then processed by process_select_expr() and the results are added to
the expression list. Finally, at the end, the expression list is returned.
*/
private function process_select(&$tokens) {
$expression = "";
$expr = array();
foreach($tokens as $token) {
if($token == ',') {
$expr[] = $this->process_select_expr(trim($expression));
$expression = "";
} else {
if($token === "" || $token===false) $token=" ";
$expression .= $token ;
}
}
$expression = trim($expression);
if($expression) $expr[] = $this->process_select_expr($expression);
return $expr;
} /* This function processes each SELECT clause. We determine what (if any) alias
is provided, and we set the type of expression.
*/
private function process_select_expr($expression) { if (empty($expression)){
return '';
} $capture = false;
$alias = "";
$base_expression = $expression;
$upper = trim(strtoupper($expression));
#if necessary, unpack the expression
if($upper[0] == '(') {
#$expression = substr($expression,1,-1);
$base_expression = $expression;
} $tokens = $this->split_sql($expression);
$token_count = count($tokens); /* Determine if there is an explicit alias after the AS clause.
If AS is found, then the next non-whitespace token is captured as the alias.
The tokens after (and including) the AS are removed.
*/
$base_expr = "";
$stripped=array();
$capture=false;
$alias = "";
$processed=false;
for($i=0;$i<$token_count;++$i) {
$token = strtoupper($tokens[$i]);
if(trim($token)) {
$stripped[] = $tokens[$i];
} if($token == 'AS') {
unset($tokens[$i]);
$capture = true;
continue;
} if($capture) {
if(trim($token)) {
$alias .= $tokens[$i];
}
unset($tokens[$i]);
continue;
}
$base_expr .= $tokens[$i];
} $stripped = $this->process_expr_list($stripped);
$last = array_pop($stripped);
if(!$alias && $last['expr_type'] == 'colref') {
$prev = array_pop($stripped);
if($prev['expr_type'] == 'operator' ||
$prev['expr_type'] == 'const' ||
$prev['expr_type'] == 'function' ||
$prev['expr_type'] == 'expression' ||
#$prev['expr_type'] == 'aggregate_function' ||
$prev['expr_type'] == 'subquery' ||
$prev['expr_type'] == 'colref') {
$alias = $last['base_expr']; #remove the last token
array_pop($tokens); $base_expr = join("", $tokens); }
} if(!$alias) {
$base_expr=join("", $tokens);
$alias = $base_expr;
} /* Properly escape the alias if it is not escaped */
if ($alias[0] != '`') {
$alias = '`' . str_replace('`','``',$alias) . '`';
}
$processed = false;
$type='expression'; if(substr(trim($base_expr),0,1) == '(') {
$base_expr = substr($expression,1,-1);
if(preg_match('/^sel/i', $base_expr)) {
$type='subquery';
$processed = $this->parse($base_expr);
}
}
if(!$processed) {
$processed = $this->process_expr_list($tokens);
} if(count($processed) == 1) {
$type = $processed[0]['expr_type'];
$processed = false;
} return array('expr_type'=>$type,'alias' => $alias, 'base_expr' => $base_expr, 'sub_tree' => $processed); } private function trimSubquery($sq)
{
$sq = trim($sq);
if(empty($sq)) return '';
while($sq[0] == '(' && substr($sq, -1) == ')') {
$sq = substr($sq, 1, -1);
}
return $sq;
} private function process_from(&$tokens) { $expression = "";
$expr = array();
$token_count=0;
$table = "";
$alias = ""; $skip_next=false;
$i=0;
$join_type = '';
$ref_type="";
$ref_expr="";
$base_expr="";
$sub_tree = false;
$subquery = ""; $first_join=true;
$modifier="";
$saved_join_type=""; foreach($tokens as $token) {
$base_expr = false;
$upper = strtoupper(trim($token)); if($skip_next && $token) {
$token_count++;
$skip_next = false;
continue;
} else {
if($skip_next) {
continue;
}
} if(preg_match("/^\\s*\\(\\s*select/i",$token)) {
$type = 'subquery';
$table = "DEPENDENT-SUBQUERY";
$sub_tree = $this->parse($this->trimSubquery($token));
$subquery = $token;
} switch($upper) {
case 'OUTER':
case 'LEFT':
case 'RIGHT':
case 'NATURAL':
case 'CROSS':
case ',':
case 'JOIN':
break; default:
$expression .= $token == '' ? " " : $token;
if($ref_type) {
$ref_expr .= $token == '' ? " " : $token;
}
break;
} switch($upper) {
case 'AS':
$token_count++;
$n=1;
$alias = "";
while($alias == "") {
$alias = trim($tokens[$i+$n]);
++$n;
} continue;
break; case 'INDEX':
if($token_category == 'CREATE') {
$token_category = $upper;
continue 2;
} break; case 'USING':
case 'ON':
$ref_type = $upper;
$ref_expr = ""; case 'CROSS':
case 'USE':
case 'FORCE':
case 'IGNORE':
case 'INNER':
case 'OUTER':
# $expression .= $token;
$token_count++;
continue;
break; case 'FOR':
$token_count++;
$skip_next = true;
continue;
break; case 'LEFT':
case 'RIGHT':
case 'STRAIGHT_JOIN':
$join_type=$saved_join_type; $modifier = $upper . " ";
break; case ',':
$modifier = 'CROSS'; case 'JOIN': if($first_join) {
$join_type = 'JOIN';
$saved_join_type = ($modifier ? $modifier : 'JOIN');
} else {
$new_join_type = ($modifier ? $modifier : 'JOIN');
$join_type = $saved_join_type;
$saved_join_type = $new_join_type;
unset($new_join_type);
} $first_join = false; if(!trim($alias)) $alias = $table; if($subquery) {
$sub_tree = $this->parse(trim($subquery,'()'));
$base_expr=$subquery;
} if(substr(trim($table),0,1) == '(') {
$base_expr=$this->trimSubquery($table);
$join_type = 'JOIN';
$sub_tree = $this->process_from($this->split_sql($base_expr));
$alias="";
} if($join_type == "") $join_type='JOIN';
$expr[] = array('table'=>$table, 'alias'=>$alias,'join_type'=>$join_type,'ref_type'=> $ref_type,'ref_clause'=>$this->trimSubquery($ref_expr), 'base_expr' => $base_expr, 'sub_tree' => $sub_tree);
$modifier = "";
#$join_type=$saved_join_type; $token_count = 0;
$table = $alias = $expression = $base_expr = $ref_type = $ref_expr = "";
$sub_tree=false;
$subquery = ""; break; default:
if($token === false || empty($token) || $token === "") continue; if($token_count == 0 ) {
if(!$table) {
$table = $token ;
}
} else if($token_count == 1) {
$alias = $token;
}
$token_count++;
break;
}
++$i;
}
if(substr(trim($table),0,1) == '(') {
$base_expr=$this->trimSubquery($table);
$join_type = 'JOIN';
$sub_tree = $this->process_from($this->split_sql($base_expr));
$alias = "";
} else {
if(!trim($alias)) $alias = $table;
}
if($join_type == "") $saved_join_type='JOIN'; $expr[] = array('table'=>$table, 'alias'=>$alias,'join_type'=>$saved_join_type,'ref_type'=> $ref_type,'ref_clause'=> $this->trimSubquery($ref_expr), 'base_expr' => $base_expr, 'sub_tree' => $sub_tree); return $expr;
} private function process_group(&$tokens, &$select) { $out=array();
$expression = "";
$direction="ASC";
$type = "expression";
if(!$tokens) return false; foreach($tokens as $token) {
switch(strtoupper($token)) {
case ',':
$expression = trim($expression);
if($expression[0] != '`' || substr($expression,-1) != '`') {
$escaped = str_replace('`','``',$expression);
} else {
$escaped = $expression;
}
$escaped = '`' . $escaped . '`'; if(is_numeric(trim($expression))) {
$type = 'pos';
} else { #search to see if the expression matches an alias
foreach($select as $clause) {
if($clause['alias'] == $escaped) {
$type = 'alias';
}
} if(!$type) $type = "expression";
} $out[]=array('type'=>$type,'base_expr'=>$expression,'direction'=>$direction);
$escaped = "";
$expression = "";
$direction = "ASC";
$type = "";
break; case 'ASC':
$direction = "ASC";
break;
case 'DESC':
$direction = "DESC";
break; default:
$expression .= $token == '' ? ' ' : $token; }
}
if($expression) {
$expression = trim($expression);
if($expression[0] != '`' || substr($expression,-1) != '`') {
$escaped = str_replace('`','``',$expression);
} else {
$escaped = $expression;
}
$escaped = '`' . $escaped . '`'; if(is_numeric(trim($expression))) {
$type = 'pos';
} else { #search to see if the expression matches an alias
if(!$type && $select) {
foreach($select as $clause) {
if(!is_array($clause)) continue;
if($clause['alias'] == $escaped) {
$type = 'alias';
}
}
} else {
$type="expression";
} if(!$type) $type = "expression";
} $out[]=array('type'=>$type,'base_expr'=>$expression,'direction'=>$direction);
}
foreach($out as &$term) {
if(!empty($term['base_expr'])) {
$term['sub_tree'] = array($this->process_select_expr($term['base_expr']));
}
} return $out;
} /* Some sections are just lists of expressions, like the WHERE and HAVING clauses. This function
processes these sections. Recursive.
*/
private function process_expr_list($tokens) {
$expr = "";
$type = "";
$prev_token = "";
$skip_next = false;
$sub_expr = ""; $in_lists = array();
foreach($tokens as $key => $token) { if(strlen(trim($token))==0) continue;
if($skip_next) {
$skip_next = false;
continue;
} $processed = false;
$upper = strtoupper(trim($token));
if(trim($token)) $token=trim($token); /* is it a subquery?*/
if(preg_match("/^\\s*\\(\\s*SELECT/i", $token)) {
$type = 'subquery';
#tokenize and parse the subquery.
#we remove the enclosing parenthesis for the tokenizer
$processed = $this->parse($this->trimSubquery($token)); /* is it an inlist */
} elseif( $upper[0] == '(' && substr($upper,-1) == ')' ) {
if($prev_token == 'IN') {
$type = "in-list";
$processed = $this->split_sql(substr($token,1,-1));
$list = array();
foreach($processed as $v) {
if($v == ',') continue;
$list[]=$v;
}
$processed = $list;
unset($list);
$prev_token = ""; }
elseif($prev_token == 'AGAINST') {
$type = "match-arguments";
$list = $this->split_sql(substr($token,1,-1));
if(count($list) > 1){
$match_mode = implode('',array_slice($list,1));
$processed = array($list[0], $match_mode);
}
else
$processed = $list[0];
$prev_token = "";
} /* it is either an operator, a colref or a constant */
} else {
switch($upper) {
case 'AND':
case '&&':
case 'BETWEEN':
case 'AND':
case 'BINARY':
case '&':
case '~':
case '|':
case '^':
case 'CASE':
case 'WHEN':
case 'END':
case 'DIV':
case '/':
case '<=>':
case '=':
case '>=':
case '>':
case 'IS':
case 'NOT':
case 'NULL':
case '<<':
case '<=':
case '<':
case 'LIKE':
case '-':
case '%':
case '!=':
case '<>':
case 'REGEXP':
case '!':
case '||':
case 'OR':
case '+':
case '>>':
case 'RLIKE':
case 'SOUNDS':
case '*':
case '-':
case 'XOR':
case 'IN':
$processed = false;
$type = "operator";
break;
default:
switch($token[0]) {
case "'":
case '"':
$type = 'const';
break;
case '`':
$type = 'colref';
break; default:
if(is_numeric($token)) {
$type = 'const';
} else {
$type = 'colref';
}
break; }
#$processed = $token;
$processed = false;
}
}
/* is a reserved word? */
if(($type != 'operator' && $type != 'in-list' && $type != 'sub_expr') && in_array($upper, $this->reserved)) {
$token = $upper;
if(!in_array($upper,$this->functions)) {
$type = 'reserved';
} else {
switch($token) {
case 'AVG':
case 'SUM':
case 'COUNT':
case 'MIN':
case 'MAX':
case 'STDDEV':
case 'STDDEV_SAMP':
case 'STDDEV_POP':
case 'VARIANCE':
case 'VAR_SAMP':
case 'VAR_POP':
case 'GROUP_CONCAT':
case 'BIT_AND':
case 'BIT_OR':
case 'BIT_XOR':
$type = 'aggregate_function';
if(!empty($tokens[$key+1])) $sub_expr = $tokens[$key+1];
#$skip_next=true;
break; default:
$type = 'function';
if(!empty($tokens[$key+1])) $sub_expr = $tokens[$key+1]; else $sub_expr="()";
#$skip_next=true; break;
}
}
} if(!$type) {
if($upper[0] == '(') {
$local_expr = substr(trim($token),1,-1);
} else {
$local_expr = $token;
}
$processed = $this->process_expr_list($this->split_sql($local_expr));
$type = 'expression'; // if(count($processed) == 1) {
// $type = $processed[0]['expr_type'];
// $base_expr = $processed[0]['base_expr'];
// $processed = $processed[0]['sub_tree'];
// } } $sub_expr=trim($sub_expr);
$sub_expr = ""; $expr[] = array( 'expr_type' => $type, 'base_expr' => $token, 'sub_tree' => $processed);
$prev_token = $upper;
$expr_type = "";
$type = "";
}
if($sub_expr) {
$processed['sub_tree'] = $this->process_expr_list($this->split_sql(substr($sub_expr,1,-1)));
} if(!is_array($processed)) {
$processed = false;
} if($expr_type) {
$expr[] = array( 'expr_type' => $type, 'base_expr' => $token, 'sub_tree' => $processed);
}
$mod = false; /* for($i=0;$i<count($expr);++$i){
if($expr[$i]['expr_type'] == 'function' ||
$expr[$i]['expr_type'] == 'aggregate_function') {
if(!empty($expr[$i+1])) {
$expr[$i]['sub_tree']=$expr[$i+1]['sub_tree'];
unset($expr[$i+1]);
$mod = 1;
++$i; // BAD FORM TO MODIFY THE LOOP COUNTER
}
} } */ if($mod) $expr=array_values($expr); return $expr;
} private function process_update($tokens) { } private function process_delete($tokens) {
$tables = array();
$del = $tokens['DELETE']; foreach($tokens['DELETE'] as $expression) {
if ($expression != 'DELETE' && trim($expression,' .*') != "" && $expression != ',') {
$tables[] = trim($expression,'.* ');
}
} if(empty($tables)) {
foreach($tokens['FROM'] as $table) {
$tables[] = $table['table'];
}
} $tokens['DELETE'] = array('TABLES' => $tables); return $tokens;
} private function process_insert($tokens, $token_category = 'INSERT') {
$table = "";
$cols = ""; $into = $tokens['INTO'];
foreach($into as $token) {
if(!trim($token)) continue;
if(!$table) {
$table = $token;
}elseif(!$cols) {
$cols = $token;
}
} if(!$cols) {
$cols = 'ALL';
} else {
$cols = explode(",", $this->trimSubquery($cols));
}
unset($tokens['INTO']);
$tokens[$token_category] = array('table'=>$table, 'cols'=>$cols);
return $tokens; } private function load_reserved_words() { $this->functions = array(
'abs',
'acos',
'adddate',
'addtime',
'aes_encrypt',
'aes_decrypt',
'against',
'ascii',
'asin',
'atan',
'avg',
'benchmark',
'bin',
'bit_and',
'bit_or',
'bitcount',
'bitlength',
'cast',
'ceiling',
'char',
'char_length',
'character_length',
'charset',
'coalesce',
'coercibility',
'collation',
'compress',
'concat',
'concat_ws',
'conection_id',
'conv',
'convert',
'convert_tz',
'cos',
'cot',
'count',
'crc32',
'curdate',
'current_user',
'currval',
'curtime',
'database',
'date_add',
'date_diff',
'date_format',
'date_sub',
'day',
'dayname',
'dayofmonth',
'dayofweek',
'dayofyear',
'decode',
'default',
'degrees',
'des_decrypt',
'des_encrypt',
'elt',
'encode',
'encrypt',
'exp',
'export_set',
'extract',
'field',
'find_in_set',
'floor',
'format',
'found_rows',
'from_days',
'from_unixtime',
'get_format',
'get_lock',
'group_concat',
'greatest',
'hex',
'hour',
'if',
'ifnull',
'in',
'inet_aton',
'inet_ntoa',
'insert',
'instr',
'interval',
'is_free_lock',
'is_used_lock',
'last_day',
'last_insert_id',
'lcase',
'least',
'left',
'length',
'ln',
'load_file',
'localtime',
'localtimestamp',
'locate',
'log',
'log2',
'log10',
'lower',
'lpad',
'ltrim',
'make_set',
'makedate',
'maketime',
'master_pos_wait',
'match',
'max',
'md5',
'microsecond',
'mid',
'min',
'minute',
'mod',
'month',
'monthname',
'nextval',
'now',
'nullif',
'oct',
'octet_length',
'old_password',
'ord',
'password',
'period_add',
'period_diff',
'pi',
'position',
'pow',
'power',
'quarter',
'quote',
'radians',
'rand',
'release_lock',
'repeat',
'replace',
'reverse',
'right',
'round',
'row_count',
'rpad',
'rtrim',
'sec_to_time',
'second',
'session_user',
'sha',
'sha1',
'sign',
'soundex',
'space',
'sqrt',
'std',
'stddev',
'stddev_pop',
'stddev_samp',
'strcmp',
'str_to_date',
'subdate',
'substr',
'substring',
'substring_index',
'subtime',
'sum',
'sysdate',
'system_user',
'tan',
'time',
'timediff',
'timestamp',
'timestampadd',
'timestampdiff',
'time_format',
'time_to_sec',
'to_days',
'trim',
'truncate',
'ucase',
'uncompress',
'uncompressed_length',
'unhex',
'unix_timestamp',
'upper',
'user',
'utc_date',
'utc_time',
'utc_timestamp',
'uuid',
'var_pop',
'var_samp',
'variance',
'version',
'week',
'weekday',
'weekofyear',
'year',
'yearweek'); /* includes functions */
$this->reserved = array(
'abs',
'acos',
'adddate',
'addtime',
'aes_encrypt',
'aes_decrypt',
'against',
'ascii',
'asin',
'atan',
'avg',
'benchmark',
'bin',
'bit_and',
'bit_or',
'bitcount',
'bitlength',
'cast',
'ceiling',
'char',
'char_length',
'character_length',
'charset',
'coalesce',
'coercibility',
'collation',
'compress',
'concat',
'concat_ws',
'conection_id',
'conv',
'convert',
'convert_tz',
'cos',
'cot',
'count',
'crc32',
'curdate',
'current_user',
'currval',
'curtime',
'database',
'date_add',
'date_diff',
'date_format',
'date_sub',
'day',
'dayname',
'dayofmonth',
'dayofweek',
'dayofyear',
'decode',
'default',
'degrees',
'des_decrypt',
'des_encrypt',
'elt',
'encode',
'encrypt',
'exp',
'export_set',
'extract',
'field',
'find_in_set',
'floor',
'format',
'found_rows',
'from_days',
'from_unixtime',
'get_format',
'get_lock',
'group_concat',
'greatest',
'hex',
'hour',
'if',
'ifnull',
'in',
'inet_aton',
'inet_ntoa',
'insert',
'instr',
'interval',
'is_free_lock',
'is_used_lock',
'last_day',
'last_insert_id',
'lcase',
'least',
'left',
'length',
'ln',
'load_file',
'localtime',
'localtimestamp',
'locate',
'log',
'log2',
'log10',
'lower',
'lpad',
'ltrim',
'make_set',
'makedate',
'maketime',
'master_pos_wait',
'match',
'max',
'md5',
'microsecond',
'mid',
'min',
'minute',
'mod',
'month',
'monthname',
'nextval',
'now',
'nullif',
'oct',
'octet_length',
'old_password',
'ord',
'password',
'period_add',
'period_diff',
'pi',
'position',
'pow',
'power',
'quarter',
'quote',
'radians',
'rand',
'release_lock',
'repeat',
'replace',
'reverse',
'right',
'round',
'row_count',
'rpad',
'rtrim',
'sec_to_time',
'second',
'session_user',
'sha',
'sha1',
'sign',
'soundex',
'space',
'sqrt',
'std',
'stddev',
'stddev_pop',
'stddev_samp',
'strcmp',
'str_to_date',
'subdate',
'substring',
'substring_index',
'subtime',
'sum',
'sysdate',
'system_user',
'tan',
'time',
'timediff',
'timestamp',
'timestampadd',
'timestampdiff',
'time_format',
'time_to_sec',
'to_days',
'trim',
'truncate',
'ucase',
'uncompress',
'uncompressed_length',
'unhex',
'unix_timestamp',
'upper',
'user',
'utc_date',
'utc_time',
'utc_timestamp',
'uuid',
'var_pop',
'var_samp',
'variance',
'version',
'week',
'weekday',
'weekofyear',
'year',
'yearweek',
'add',
'all',
'alter',
'analyze',
'and',
'as',
'asc',
'asensitive',
'auto_increment',
'bdb',
'before',
'berkeleydb',
'between',
'bigint',
'binary',
'blob',
'both',
'by',
'call',
'cascade',
'case',
'change',
'char',
'character',
'check',
'collate',
'column',
'columns',
'condition',
'connection',
'constraint',
'continue',
'create',
'cross',
'current_date',
'current_time',
'current_timestamp',
'cursor',
'database',
'databases',
'day_hour',
'day_microsecond',
'day_minute',
'day_second',
'dec',
'decimal',
'declare',
'default',
'delayed',
'delete',
'desc',
'describe',
'deterministic',
'distinct',
'distinctrow',
'div',
'double',
'drop',
'else',
'elseif',
'enclosed',
'escaped',
'exists',
'exit',
'explain',
'false',
'fetch',
'fields',
'float',
'for',
'force',
'foreign',
'found',
'frac_second',
'from',
'fulltext',
'grant',
'group',
'having',
'high_priority',
'hour_microsecond',
'hour_minute',
'hour_second',
'if',
'ignore',
'in',
'index',
'infile',
'inner',
'innodb',
'inout',
'insensitive',
'insert',
'int',
'integer',
'interval',
'into',
'io_thread',
'is',
'iterate',
'join',
'key',
'keys',
'kill',
'leading',
'leave',
'left',
'like',
'limit',
'lines',
'load',
'localtime',
'localtimestamp',
'lock',
'long',
'longblob',
'longtext',
'loop',
'low_priority',
'master_server_id',
'match',
'mediumblob',
'mediumint',
'mediumtext',
'middleint',
'minute_microsecond',
'minute_second',
'mod',
'natural',
'not',
'no_write_to_binlog',
'null',
'numeric',
'on',
'optimize',
'option',
'optionally',
'or',
'order',
'out',
'outer',
'outfile',
'precision',
'primary',
'privileges',
'procedure',
'purge',
'read',
'real',
'references',
'regexp',
'rename',
'repeat',
'replace',
'require',
'restrict',
'return',
'revoke',
'right',
'rlike',
'second_microsecond',
'select',
'sensitive',
'separator',
'set',
'show',
'smallint',
'some',
'soname',
'spatial',
'specific',
'sql',
'sqlexception',
'sqlstate',
'sqlwarning',
'sql_big_result',
'sql_calc_found_rows',
'sql_small_result',
'sql_tsi_day',
'sql_tsi_frac_second',
'sql_tsi_hour',
'sql_tsi_minute',
'sql_tsi_month',
'sql_tsi_quarter',
'sql_tsi_second',
'sql_tsi_week',
'sql_tsi_year',
'ssl',
'starting',
'straight_join',
'striped',
'table',
'tables',
'terminated',
'then',
'timestampadd',
'timestampdiff',
'tinyblob',
'tinyint',
'tinytext',
'to',
'trailing',
'true',
'undo',
'union',
'unique',
'unlock',
'unsigned',
'update',
'usage',
'use',
'user_resources',
'using',
'utc_date',
'utc_time',
'utc_timestamp',
'values',
'varbinary',
'varchar',
'varcharacter',
'varying',
'when',
'where',
'while',
'with',
'write',
'xor',
'year_month',
'zerofill'
); for($i=0;$i<count($this->reserved);++$i) {
$this->reserved[$i]=strtoupper($this->reserved[$i]);
if(!empty($this->functions[$i])) $this->functions[$i] = strtoupper($this->functions[$i]);
}
} } // END CLASS
<?php
/**
* SQL Parser from: http://code.google.com/p/php-sql-parser/
* License: New BSD
*/
class PHPSQLParser
{
var $reserved = array();
var $functions = array();
function __construct($sql = false) {
#LOAD THE LIST OF RESERVED WORDS
$this->load_reserved_words();
if($sql) $this->parse($sql);
}
function parse($sql) {
$sql = trim($sql);
#lex the SQL statement
$in = $this->split_sql($sql);
#sometimes the parser needs to skip ahead until a particular
#token is found
$skip_until = false;
#this is the output tree which is being parsed
$out = array();
#This is the last type of union used (UNION or UNION ALL)
#indicates a) presence of at least one union in this query
# b) the type of union if this is the first or last query
$union = false;
#Sometimes a "query" consists of more than one query (like a UNION query)
#this array holds all the queries
$queries=array();
#This is the highest level lexical analysis. This is the part of the
#code which finds UNION and UNION ALL query parts
foreach($in as $key => $token) {
$token=trim($token);
if($skip_until) {
if($token) {
if(strtoupper($token) == $skip_until) {
$skip_until = false;
continue;
}
} else {
continue;
}
}
if(strtoupper($token) == "UNION") {
$union = 'UNION';
for($i=$key+1;$i<count($in);++$i) {
if(trim($in[$i]) == '') continue;
if(strtoupper($in[$i]) == 'ALL') {
$skip_until = 'ALL';
$union = 'UNION ALL';
continue ;
} else {
break;
}
}
$queries[$union][] = $out;
$out = array();
} else {
$out[]=$token;
}
}
if(!empty($out)) {
if ($union) {
$queries[$union][] = $out;
} else {
$queries[] = $out;
}
}
/*MySQL supports a special form of UNION:
(select ...)
union
(select ...)
This block handles this query syntax. Only one such subquery
is supported in each UNION block. (select)(select)union(select) is not legal.
The extra queries will be silently ignored.
*/
$union_types = array('UNION','UNION ALL');
foreach($union_types as $union_type) {
if(!empty($queries[$union_type])) {
foreach($queries[$union_type] as $i => $tok_list) {
foreach($tok_list as $z => $tok) {
$tok = trim($tok);
if(!$tok) continue;
if(preg_match('/^\\(\\s*select\\s*/i', $tok)) {
$queries[$union_type][$i] = $this->parse(substr($tok,1,-1));
break;
} else {
$queries[$union_type][$i] = $this->process_sql($queries[$union_type][$i]);
break;
}
}
}
}
}
/* If there was no UNION or UNION ALL in the query, then the query is
stored at $queries[0].
*/
if(!empty($queries[0])) {
$queries[0] = $this->process_sql($queries[0]);
}
if(count($queries) == 1 && !$union) {
$queries = $queries[0];
}
$this->parsed = $queries;
return $this->parsed;
}
#This function counts open and close parenthesis and
#returns their location. This might be faster as a regex
private function count_paren($token,$chars=array('(',')')) {
$len = strlen($token);
$open=array();
$close=array();
for($i=0;$i<$len;++$i){
if($token[$i] == $chars[0]) {
$open[] = $i;
} elseif($token[$i] == $chars[1]) {
$close[] = $i;
}
}
return array('open' => $open, 'close' => $close, 'balanced' =>( count($close) - count($open)));
}
#This function counts open and close parenthesis and
#returns their location. This might be faster as a regex
private function count_backtick($token) {
$len = strlen($token);
$cnt=0;
for($i=0;$i<$len;++$i){
if($token[$i] == '`') ++$cnt;
}
return $cnt;
}
#This is the lexer
#this function splits up a SQL statement into easy to "parse"
#tokens for the SQL processor
private function split_sql($sql) {
if(!is_string($sql)) {
return false;
}
$sql = str_replace(array('\\\'','\\"',"\r\n","\n","()"),array("''",'""'," "," "," "), $sql);
$regex=<<<EOREGEX
/(`(?:[^`]|``)`|[@A-Za-z0-9_.`-]+(?:\(\s*\)){0,1})
|(\+|-|\*|\/|!=|>=|<=|<>|>|<|&&|\|\||=|\^)
|(\(.*?\)) # Match FUNCTION(...) OR BAREWORDS
|('(?:[^']|'')*'+)
|("(?:[^"]|"")*"+)
|([^ ,]+)
/ix
EOREGEX
;
$tokens = preg_split($regex, $sql,-1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
$token_count = count($tokens);
/* The above regex has one problem, because the parenthetical match is not greedy.
Thus, when matching grouped expressions such as ( (a and b) or c) the
tokenizer will produce "( (a and b)", " ", "or", " " , "c,")"
This block detects the number of open/close parentheses in the given token. If the parentheses are balanced
(balanced == 0) then we don't need to do anything.
otherwise, we need to balance the expression.
*/
$reset = false;
for($i=0;$i<$token_count;++$i) {
if(empty($tokens[$i])) continue;
$token = $tokens[$i];
$trim = trim($token);
if($trim) {
if($trim[0] != '('
&& substr($trim,-1) == ')') {
$trim=trim(substr($trim,0,
strpos($trim,'(')));
}
$tokens[$i]=$trim;
$token=$trim;
}
if($token && $token[0] == '(') {
$info = $this->count_paren($token);
if($info['balanced'] == 0) {
continue;
}
// We need to find this many closing parentheses.
$needed = abs($info['balanced']);
$n = $i;
while($needed > 0 && $n <$token_count-1) {
++$n;
#echo "LOOKING FORWARD TO $n [ " . $tokens[$n] . "]\n";
$token2 = $tokens[$n];
$info2 = $this->count_paren($token2);
$closes = count($info2['close']);
if($closes != $needed) {
$tokens[$i] .= $tokens[$n];
unset($tokens[$n]);
$reset = true;
$info2 = $this->count_paren($tokens[$i]);
$needed = abs($info2['balanced']);
# echo "CLOSES LESS THAN NEEDED (still need $needed)\n";
} else {
/*get the string pos of the last close parenthesis we need*/
$pos = $info2['close'][count($info2['close'])-1];
$str1 = $str2 = "";
if($pos == 0) {
$str1 = ')';
} else {
$str1 = substr($tokens[$n],0,$pos) . ')';
$str2 = substr($tokens[$n],$pos+1);
}
#echo "CLOSES FOUND AT $n, offset:$pos [$str1] [$str2]\n";
if(strlen($str2) > 0) {
$tokens[$n] = $str2;
} else {
unset($tokens[$n]);
$reset = true;
}
$tokens[$i] .= $str1;
$info2 = $this->count_paren($tokens[$i]);
$needed = abs($info2['balanced']);
}
}
}
}
#the same problem appears with backticks :(
/* reset the array if we deleted any tokens above */
if ($reset) $tokens = array_values($tokens);
$token_count=count($tokens);
for($i=0;$i<$token_count;++$i) {
if(empty($tokens[$i])) continue;
$token=$tokens[$i];
$needed=true;
$reset=false;
if($needed && $token && strpos($token,'`') !== false) {
$info = $this->count_backtick($token);
if($info %2 == 0) { #even number of backticks means we are balanced
continue;
}
$needed=1;
$n = $i;
while($needed && $n <$token_count-1) {
$reset=true;
#echo "BACKTICK COUNT[$i]: $info old: {$tokens[$i]}, new: ($token)\n";
++$n;
$token .= $tokens[$n];
unset($tokens[$n]);
$needed = $this->count_backtick($token) % 2;
}
}
if($reset) $tokens[$i] = $token;
}
/* reset the array if we deleted any tokens above */
$tokens = array_values($tokens);
return $tokens;
}
/* This function breaks up the SQL statement into logical sections.
Some sections are then further handled by specialized functions.
*/
private function process_sql(&$tokens,$start_at = 0, $stop_at = false) {
$prev_category = "";
$start = microtime(true);
$token_category = "";
$skip_next=false;
$token_count = count($tokens);
if(!$stop_at) {
$stop_at = $token_count;
}
$out = false;
for($token_number = $start_at;$token_number<$stop_at;++$token_number) {
$token = trim($tokens[$token_number]);
if($token && $token[0] == '(' && $token_category == "") {
$token_category = 'SELECT';
}
/* If it isn't obvious, when $skip_next is set, then we ignore the next real
token, that is we ignore whitespace.
*/
if($skip_next) {
#whitespace does not count as a next token
if($token == "") {
continue;
}
#to skip the token we replace it with whitespace
$new_token = "";
$skip_next = false;
}
$upper = strtoupper($token);
switch($upper) {
/* Tokens that get their own sections. These keywords have subclauses. */
case 'SELECT':
case 'ORDER':
case 'LIMIT':
case 'SET':
case 'DUPLICATE':
case 'VALUES':
case 'GROUP':
case 'ORDER':
case 'HAVING':
case 'INTO':
case 'WHERE':
case 'RENAME':
case 'CALL':
case 'PROCEDURE':
case 'FUNCTION':
case 'DATABASE':
case 'SERVER':
case 'LOGFILE':
case 'DEFINER':
case 'RETURNS':
case 'EVENT':
case 'TABLESPACE':
case 'VIEW':
case 'TRIGGER':
case 'DATA':
case 'DO':
case 'PASSWORD':
case 'USER':
case 'PLUGIN':
case 'FROM':
case 'FLUSH':
case 'KILL':
case 'RESET':
case 'START':
case 'STOP':
case 'PURGE':
case 'EXECUTE':
case 'PREPARE':
case 'DEALLOCATE':
if($token == 'DEALLOCATE') {
$skip_next = true;
}
/* this FROM is different from FROM in other DML (not join related) */
if($token_category == 'PREPARE' && $upper == 'FROM') {
continue 2;
}
$token_category = $upper;
#$join_type = 'JOIN';
if($upper == 'FROM' && $token_category == 'FROM') {
/* DO NOTHING*/
} else {
continue 2;
}
break;
/* These tokens get their own section, but have no subclauses.
These tokens identify the statement but have no specific subclauses of their own. */
case 'DELETE':
case 'ALTER':
case 'INSERT':
case 'REPLACE':
case 'TRUNCATE':
case 'CREATE':
case 'TRUNCATE':
case 'OPTIMIZE':
case 'GRANT':
case 'REVOKE':
case 'SHOW':
case 'HANDLER':
case 'LOAD':
case 'ROLLBACK':
case 'SAVEPOINT':
case 'UNLOCK':
case 'INSTALL':
case 'UNINSTALL':
case 'ANALZYE':
case 'BACKUP':
case 'CHECK':
case 'CHECKSUM':
case 'REPAIR':
case 'RESTORE':
case 'CACHE':
case 'DESCRIBE':
case 'EXPLAIN':
case 'USE':
case 'HELP':
$token_category = $upper; /* set the category in case these get subclauses
in a future version of MySQL */
$out[$upper][0] = $upper;
continue 2;
break;
/* This is either LOCK TABLES or SELECT ... LOCK IN SHARE MODE*/
case 'LOCK':
if($token_category == "") {
$token_category = $upper;
$out[$upper][0] = $upper;
} else {
$token = 'LOCK IN SHARE MODE';
$skip_next=true;
$out['OPTIONS'][] = $token;
}
continue 2;
break;
case 'USING':
/* USING in FROM clause is different from USING w/ prepared statement*/
if($token_category == 'EXECUTE') {
$token_category=$upper;
continue 2;
}
if($token_category == 'FROM' && !empty($out['DELETE'])) {
$token_category=$upper;
continue 2;
}
break;
/* DROP TABLE is different from ALTER TABLE DROP ... */
case 'DROP':
if($token_category != 'ALTER') {
$token_category = $upper;
$out[$upper][0] = $upper;
continue 2;
}
break;
case 'FOR':
$skip_next=true;
$out['OPTIONS'][] = 'FOR UPDATE';
continue 2;
break;
case 'UPDATE':
if($token_category == "" ) {
$token_category = $upper;
continue 2;
}
if($token_category == 'DUPLICATE') {
continue 2;
}
break;
break;
case 'START':
$token = "BEGIN";
$out[$upper][0] = $upper;
$skip_next = true;
break;
/* These tokens are ignored. */
case 'BY':
case 'ALL':
case 'SHARE':
case 'MODE':
case 'TO':
case ';':
continue 2;
break;
case 'KEY':
if($token_category == 'DUPLICATE') {
continue 2;
}
break;
/* These tokens set particular options for the statement. They never stand alone.*/
case 'DISTINCTROW':
$token='DISTINCT';
case 'DISTINCT':
case 'HIGH_PRIORITY':
case 'LOW_PRIORITY':
case 'DELAYED':
case 'IGNORE':
case 'FORCE':
case 'STRAIGHT_JOIN':
case 'SQL_SMALL_RESULT':
case 'SQL_BIG_RESULT':
case 'QUICK':
case 'SQL_BUFFER_RESULT':
case 'SQL_CACHE':
case 'SQL_NO_CACHE':
case 'SQL_CALC_FOUND_ROWS':
$out['OPTIONS'][] = $upper;
continue 2;
break;
case 'WITH':
if($token_category == 'GROUP') {
$skip_next=true;
$out['OPTIONS'][] = 'WITH ROLLUP';
continue 2;
}
break;
case 'AS':
break;
case '':
case ',':
case ';':
break;
default:
break;
}
if($prev_category == $token_category) {
$out[$token_category][] = $token;
}
$prev_category = $token_category;
}
if(!$out) return false;
#process the SELECT clause
if(!empty($out['SELECT'])) $out['SELECT'] = $this->process_select($out['SELECT']);
if(!empty($out['FROM'])) $out['FROM'] = $this->process_from($out['FROM']);
if(!empty($out['USING'])) $out['USING'] = $this->process_from($out['USING']);
if(!empty($out['UPDATE'])) $out['UPDATE'] = $this->process_from($out['UPDATE']);
if(!empty($out['GROUP'])) $out['GROUP'] = $this->process_group($out['GROUP'], $out['SELECT']);
if(!empty($out['ORDER'])) $out['ORDER'] = $this->process_group($out['ORDER'], $out['SELECT']);
if(!empty($out['LIMIT'])) $out['LIMIT'] = $this->process_limit($out['LIMIT']);
if(!empty($out['WHERE'])) $out['WHERE'] = $this->process_expr_list($out['WHERE']);
if(!empty($out['HAVING'])) $out['HAVING'] = $this->process_expr_list($out['HAVING']);
if(!empty($out['SET'])) $out['SET'] = $this->process_set_list($out['SET']);
if(!empty($out['DUPLICATE'])) {
$out['ON DUPLICATE KEY UPDATE'] = $this->process_set_list($out['DUPLICATE']);
unset($out['DUPLICATE']);
}
if(!empty($out['INSERT'])) $out = $this->process_insert($out);
if(!empty($out['REPLACE'])) $out = $this->process_insert($out,'REPLACE');
if(!empty($out['DELETE'])) $out = $this->process_delete($out);
return $out;
}
/* A SET list is simply a list of key = value expressions separated by comma (,).
This function produces a list of the key/value expressions.
*/
private function process_set_list($tokens) {
$column="";
$expression="";
foreach($tokens as $token) {
$token=trim($token);
if(!$column) {
if($token === false || empty($token)) continue;
$column .= $token;
continue;
}
if($token == '=') continue;
if($token == ',') {
$expr[] = array('column' => trim($column), 'expr' => trim($expression));
$expression = $column = "";
continue;
}
$expression .= $token;
}
if($expression) {
$expr[] = array('column' => trim($column), 'expr' => trim($expression));
}
return $expr;
}
/* This function processes the LIMIT section.
start,end are set. If only end is provided in the query
then start is set to 0.
*/
private function process_limit($tokens) {
$start = 0;
$end = 0;
if($pos = array_search(',',$tokens)) {
for($i=0;$i<$pos;++$i) {
if($tokens[$i] != '') {
$start = $tokens[$i];
break;
}
}
$pos = $pos + 1;
} else {
$pos = 0;
}
for($i=$pos;$i<count($tokens);++$i) {
if($tokens[$i] != '') {
$end = $tokens[$i];
break;
}
}
return array('start' => $start, 'end' => $end);
}
/* This function processes the SELECT section. It splits the clauses at the commas.
Each clause is then processed by process_select_expr() and the results are added to
the expression list.
Finally, at the end, the expression list is returned.
*/
private function process_select(&$tokens) {
$expression = "";
$expr = array();
foreach($tokens as $token) {
if($token == ',') {
$expr[] = $this->process_select_expr(trim($expression));
$expression = "";
} else {
if($token === "" || $token===false) $token=" ";
$expression .= $token ;
}
}
$expression = trim($expression);
if($expression) $expr[] = $this->process_select_expr($expression);
return $expr;
}
/* This function processes each SELECT clause. We determine what (if any) alias
is provided, and we set the type of expression.
*/
private function process_select_expr($expression) {
if (empty($expression)){
return '';
}
$capture = false;
$alias = "";
$base_expression = $expression;
$upper = trim(strtoupper($expression));
#if necessary, unpack the expression
if($upper[0] == '(') {
#$expression = substr($expression,1,-1);
$base_expression = $expression;
}
$tokens = $this->split_sql($expression);
$token_count = count($tokens);
/* Determine if there is an explicit alias after the AS clause.
If AS is found, then the next non-whitespace token is captured as the alias.
The tokens after (and including) the AS are removed.
*/
$base_expr = "";
$stripped=array();
$capture=false;
$alias = "";
$processed=false;
for($i=0;$i<$token_count;++$i) {
$token = strtoupper($tokens[$i]);
if(trim($token)) {
$stripped[] = $tokens[$i];
}
if($token == 'AS') {
unset($tokens[$i]);
$capture = true;
continue;
}
if($capture) {
if(trim($token)) {
$alias .= $tokens[$i];
}
unset($tokens[$i]);
continue;
}
$base_expr .= $tokens[$i];
}
$stripped = $this->process_expr_list($stripped);
$last = array_pop($stripped);
if(!$alias && $last['expr_type'] == 'colref') {
$prev = array_pop($stripped);
if($prev['expr_type'] == 'operator' ||
$prev['expr_type'] == 'const' ||
$prev['expr_type'] == 'function' ||
$prev['expr_type'] == 'expression' ||
#$prev['expr_type'] == 'aggregate_function' ||
$prev['expr_type'] == 'subquery' ||
$prev['expr_type'] == 'colref') {
$alias = $last['base_expr'];
#remove the last token
array_pop($tokens);
$base_expr = join("", $tokens);
}
}
if(!$alias) {
$base_expr=join("", $tokens);
$alias = $base_expr;
}
/* Properly escape the alias if it is not escaped */
if ($alias[0] != '`') {
$alias = '`' . str_replace('`','``',$alias) . '`';
}
$processed = false;
$type='expression';
if(substr(trim($base_expr),0,1) == '(') {
$base_expr = substr($expression,1,-1);
if(preg_match('/^sel/i', $base_expr)) {
$type='subquery';
$processed = $this->parse($base_expr);
}
}
if(!$processed) {
$processed = $this->process_expr_list($tokens);
}
if(count($processed) == 1) {
$type = $processed[0]['expr_type'];
$processed = false;
}
return array('expr_type'=>$type,'alias' => $alias, 'base_expr' => $base_expr, 'sub_tree' => $processed);
}
private function trimSubquery($sq)
{
$sq = trim($sq);
if(empty($sq)) return '';
while($sq[0] == '(' && substr($sq, -1) == ')') {
$sq = substr($sq, 1, -1);
}
return $sq;
}
private function process_from(&$tokens) {
$expression = "";
$expr = array();
$token_count=0;
$table = "";
$alias = "";
$skip_next=false;
$i=0;
$join_type = '';
$ref_type="";
$ref_expr="";
$base_expr="";
$sub_tree = false;
$subquery = "";
$first_join=true;
$modifier="";
$saved_join_type="";
foreach($tokens as $token) {
$base_expr = false;
$upper = strtoupper(trim($token));
if($skip_next && $token) {
$token_count++;
$skip_next = false;
continue;
} else {
if($skip_next) {
continue;
}
}
if(preg_match("/^\\s*\\(\\s*select/i",$token)) {
$type = 'subquery';
$table = "DEPENDENT-SUBQUERY";
$sub_tree = $this->parse($this->trimSubquery($token));
$subquery = $token;
}
switch($upper) {
case 'OUTER':
case 'LEFT':
case 'RIGHT':
case 'NATURAL':
case 'CROSS':
case ',':
case 'JOIN':
break;
default:
$expression .= $token == '' ? " " : $token;
if($ref_type) {
$ref_expr .= $token == '' ? " " : $token;
}
break;
}
switch($upper) {
case 'AS':
$token_count++;
$n=1;
$alias = "";
while($alias == "") {
$alias = trim($tokens[$i+$n]);
++$n;
}
continue;
break;
case 'INDEX':
if($token_category == 'CREATE') {
$token_category = $upper;
continue 2;
}
break;
case 'USING':
case 'ON':
$ref_type = $upper;
$ref_expr = "";
case 'CROSS':
case 'USE':
case 'FORCE':
case 'IGNORE':
case 'INNER':
case 'OUTER':
# $expression .= $token;
$token_count++;
continue;
break;
case 'FOR':
$token_count++;
$skip_next = true;
continue;
break;
case 'LEFT':
case 'RIGHT':
case 'STRAIGHT_JOIN':
$join_type=$saved_join_type;
$modifier = $upper . " ";
break;
case ',':
$modifier = 'CROSS';
case 'JOIN':
if($first_join) {
$join_type = 'JOIN';
$saved_join_type = ($modifier ? $modifier : 'JOIN');
} else {
$new_join_type = ($modifier ? $modifier : 'JOIN');
$join_type = $saved_join_type;
$saved_join_type = $new_join_type;
unset($new_join_type);
}
$first_join = false;
if(!trim($alias)) $alias = $table;
if($subquery) {
$sub_tree = $this->parse(trim($subquery,'()'));
$base_expr=$subquery;
}
if(substr(trim($table),0,1) == '(') {
$base_expr=$this->trimSubquery($table);
$join_type = 'JOIN';
$sub_tree = $this->process_from($this->split_sql($base_expr));
$alias="";
}
if($join_type == "") $join_type='JOIN';
$expr[] = array('table'=>$table, 'alias'=>$alias,'join_type'=>$join_type,'ref_type'=> $ref_type,'ref_clause'=>$this->trimSubquery($ref_expr), 'base_expr' => $base_expr, 'sub_tree' => $sub_tree);
$modifier = "";
#$join_type=$saved_join_type;
$token_count = 0;
$table = $alias = $expression = $base_expr = $ref_type = $ref_expr = "";
$sub_tree=false;
$subquery = "";
break;
default:
if($token === false || empty($token) || $token === "") continue;
if($token_count == 0 ) {
if(!$table) {
$table = $token ;
}
} else if($token_count == 1) {
$alias = $token;
}
$token_count++;
break;
}
++$i;
}
if(substr(trim($table),0,1) == '(') {
$base_expr=$this->trimSubquery($table);
$join_type = 'JOIN';
$sub_tree = $this->process_from($this->split_sql($base_expr));
$alias = "";
} else {
if(!trim($alias)) $alias = $table;
}
if($join_type == "") $saved_join_type='JOIN';
$expr[] = array('table'=>$table, 'alias'=>$alias,'join_type'=>$saved_join_type,'ref_type'=> $ref_type,'ref_clause'=> $this->trimSubquery($ref_expr), 'base_expr' => $base_expr, 'sub_tree' => $sub_tree);
return $expr;
}
private function process_group(&$tokens, &$select) {
$out=array();
$expression = "";
$direction="ASC";
$type = "expression";
if(!$tokens) return false;
foreach($tokens as $token) {
switch(strtoupper($token)) {
case ',':
$expression = trim($expression);
if($expression[0] != '`' || substr($expression,-1) != '`') {
$escaped = str_replace('`','``',$expression);
} else {
$escaped = $expression;
}
$escaped = '`' . $escaped . '`';
if(is_numeric(trim($expression))) {
$type = 'pos';
} else {
#search to see if the expression matches an alias
foreach($select as $clause) {
if($clause['alias'] == $escaped) {
$type = 'alias';
}
}
if(!$type) $type = "expression";
}
$out[]=array('type'=>$type,'base_expr'=>$expression,'direction'=>$direction);
$escaped = "";
$expression = "";
$direction = "ASC";
$type = "";
break;
case 'ASC':
$direction = "ASC";
break;
case 'DESC':
$direction = "DESC";
break;
default:
$expression .= $token == '' ? ' ' : $token;
}
}
if($expression) {
$expression = trim($expression);
if($expression[0] != '`' || substr($expression,-1) != '`') {
$escaped = str_replace('`','``',$expression);
} else {
$escaped = $expression;
}
$escaped = '`' . $escaped . '`';
if(is_numeric(trim($expression))) {
$type = 'pos';
} else {
#search to see if the expression matches an alias
if(!$type && $select) {
foreach($select as $clause) {
if(!is_array($clause)) continue;
if($clause['alias'] == $escaped) {
$type = 'alias';
}
}
} else {
$type="expression";
}
if(!$type) $type = "expression";
}
$out[]=array('type'=>$type,'base_expr'=>$expression,'direction'=>$direction);
}
foreach($out as &$term) {
if(!empty($term['base_expr'])) {
$term['sub_tree'] = array($this->process_select_expr($term['base_expr']));
}
}
return $out;
}
/* Some sections are just lists of expressions, like the WHERE and HAVING clauses. This function
processes these sections. Recursive.
*/
private function process_expr_list($tokens) {
$expr = "";
$type = "";
$prev_token = "";
$skip_next = false;
$sub_expr = "";
$in_lists = array();
foreach($tokens as $key => $token) {
if(strlen(trim($token))==0) continue;
if($skip_next) {
$skip_next = false;
continue;
}
$processed = false;
$upper = strtoupper(trim($token));
if(trim($token)) $token=trim($token);
/* is it a subquery?*/
if(preg_match("/^\\s*\\(\\s*SELECT/i", $token)) {
$type = 'subquery';
#tokenize and parse the subquery.
#we remove the enclosing parenthesis for the tokenizer
$processed = $this->parse($this->trimSubquery($token));
/* is it an inlist */
} elseif( $upper[0] == '(' && substr($upper,-1) == ')' ) {
if($prev_token == 'IN') {
$type = "in-list";
$processed = $this->split_sql(substr($token,1,-1));
$list = array();
foreach($processed as $v) {
if($v == ',') continue;
$list[]=$v;
}
$processed = $list;
unset($list);
$prev_token = "";
}
elseif($prev_token == 'AGAINST') {
$type = "match-arguments";
$list = $this->split_sql(substr($token,1,-1));
if(count($list) > 1){
$match_mode = implode('',array_slice($list,1));
$processed = array($list[0], $match_mode);
}
else
$processed = $list[0];
$prev_token = "";
}
/* it is either an operator, a colref or a constant */
} else {
switch($upper) {
case 'AND':
case '&&':
case 'BETWEEN':
case 'AND':
case 'BINARY':
case '&':
case '~':
case '|':
case '^':
case 'CASE':
case 'WHEN':
case 'END':
case 'DIV':
case '/':
case '<=>':
case '=':
case '>=':
case '>':
case 'IS':
case 'NOT':
case 'NULL':
case '<<':
case '<=':
case '<':
case 'LIKE':
case '-':
case '%':
case '!=':
case '<>':
case 'REGEXP':
case '!':
case '||':
case 'OR':
case '+':
case '>>':
case 'RLIKE':
case 'SOUNDS':
case '*':
case '-':
case 'XOR':
case 'IN':
$processed = false;
$type = "operator";
break;
default:
switch($token[0]) {
case "'":
case '"':
$type = 'const';
break;
case '`':
$type = 'colref';
break;
default:
if(is_numeric($token)) {
$type = 'const';
} else {
$type = 'colref';
}
break;
}
#$processed = $token;
$processed = false;
}
}
/* is a reserved word? */
if(($type != 'operator' && $type != 'in-list' && $type != 'sub_expr') && in_array($upper, $this->reserved)) {
$token = $upper;
if(!in_array($upper,$this->functions)) {
$type = 'reserved';
} else {
switch($token) {
case 'AVG':
case 'SUM':
case 'COUNT':
case 'MIN':
case 'MAX':
case 'STDDEV':
case 'STDDEV_SAMP':
case 'STDDEV_POP':
case 'VARIANCE':
case 'VAR_SAMP':
case 'VAR_POP':
case 'GROUP_CONCAT':
case 'BIT_AND':
case 'BIT_OR':
case 'BIT_XOR':
$type = 'aggregate_function';
if(!empty($tokens[$key+1])) $sub_expr = $tokens[$key+1];
#$skip_next=true;
break;
default:
$type = 'function';
if(!empty($tokens[$key+1])) $sub_expr = $tokens[$key+1]; else $sub_expr="()";
#$skip_next=true;
break;
}
}
}
if(!$type) {
if($upper[0] == '(') {
$local_expr = substr(trim($token),1,-1);
} else {
$local_expr = $token;
}
$processed = $this->process_expr_list($this->split_sql($local_expr));
$type = 'expression';
// if(count($processed) == 1) {
// $type = $processed[0]['expr_type'];
// $base_expr = $processed[0]['base_expr'];
// $processed = $processed[0]['sub_tree'];
// }
}
$sub_expr=trim($sub_expr);
$sub_expr = "";
$expr[] = array( 'expr_type' => $type, 'base_expr' => $token, 'sub_tree' => $processed);
$prev_token = $upper;
$expr_type = "";
$type = "";
}
if($sub_expr) {
$processed['sub_tree'] = $this->process_expr_list($this->split_sql(substr($sub_expr,1,-1)));
}
if(!is_array($processed)) {
$processed = false;
}
if($expr_type) {
$expr[] = array( 'expr_type' => $type, 'base_expr' => $token, 'sub_tree' => $processed);
}
$mod = false;
/*
for($i=0;$i<count($expr);++$i){
if($expr[$i]['expr_type'] == 'function' ||
$expr[$i]['expr_type'] == 'aggregate_function') {
if(!empty($expr[$i+1])) {
$expr[$i]['sub_tree']=$expr[$i+1]['sub_tree'];
unset($expr[$i+1]);
$mod = 1;
++$i; // BAD FORM TO MODIFY THE LOOP COUNTER
}
}
}
*/
if($mod) $expr=array_values($expr);
return $expr;
}
private function process_update($tokens) {
}
private function process_delete($tokens) {
$tables = array();
$del = $tokens['DELETE'];
foreach($tokens['DELETE'] as $expression) {
if ($expression != 'DELETE' && trim($expression,' .*') != "" && $expression != ',') {
$tables[] = trim($expression,'.* ');
}
}
if(empty($tables)) {
foreach($tokens['FROM'] as $table) {
$tables[] = $table['table'];
}
}
$tokens['DELETE'] = array('TABLES' => $tables);
return $tokens;
}
private function process_insert($tokens, $token_category = 'INSERT') {
$table = "";
$cols = "";
$into = $tokens['INTO'];
foreach($into as $token) {
if(!trim($token)) continue;
if(!$table) {
$table = $token;
}elseif(!$cols) {
$cols = $token;
}
}
if(!$cols) {
$cols = 'ALL';
} else {
$cols = explode(",", $this->trimSubquery($cols));
}
unset($tokens['INTO']);
$tokens[$token_category] = array('table'=>$table, 'cols'=>$cols);
return $tokens;
}
private function load_reserved_words() {
$this->functions = array(
'abs',
'acos',
'adddate',
'addtime',
'aes_encrypt',
'aes_decrypt',
'against',
'ascii',
'asin',
'atan',
'avg',
'benchmark',
'bin',
'bit_and',
'bit_or',
'bitcount',
'bitlength',
'cast',
'ceiling',
'char',
'char_length',
'character_length',
'charset',
'coalesce',
'coercibility',
'collation',
'compress',
'concat',
'concat_ws',
'conection_id',
'conv',
'convert',
'convert_tz',
'cos',
'cot',
'count',
'crc32',
'curdate',
'current_user',
'currval',
'curtime',
'database',
'date_add',
'date_diff',
'date_format',
'date_sub',
'day',
'dayname',
'dayofmonth',
'dayofweek',
'dayofyear',
'decode',
'default',
'degrees',
'des_decrypt',
'des_encrypt',
'elt',
'encode',
'encrypt',
'exp',
'export_set',
'extract',
'field',
'find_in_set',
'floor',
'format',
'found_rows',
'from_days',
'from_unixtime',
'get_format',
'get_lock',
'group_concat',
'greatest',
'hex',
'hour',
'if',
'ifnull',
'in',
'inet_aton',
'inet_ntoa',
'insert',
'instr',
'interval',
'is_free_lock',
'is_used_lock',
'last_day',
'last_insert_id',
'lcase',
'least',
'left',
'length',
'ln',
'load_file',
'localtime',
'localtimestamp',
'locate',
'log',
'log2',
'log10',
'lower',
'lpad',
'ltrim',
'make_set',
'makedate',
'maketime',
'master_pos_wait',
'match',
'max',
'md5',
'microsecond',
'mid',
'min',
'minute',
'mod',
'month',
'monthname',
'nextval',
'now',
'nullif',
'oct',
'octet_length',
'old_password',
'ord',
'password',
'period_add',
'period_diff',
'pi',
'position',
'pow',
'power',
'quarter',
'quote',
'radians',
'rand',
'release_lock',
'repeat',
'replace',
'reverse',
'right',
'round',
'row_count',
'rpad',
'rtrim',
'sec_to_time',
'second',
'session_user',
'sha',
'sha1',
'sign',
'soundex',
'space',
'sqrt',
'std',
'stddev',
'stddev_pop',
'stddev_samp',
'strcmp',
'str_to_date',
'subdate',
'substr',
'substring',
'substring_index',
'subtime',
'sum',
'sysdate',
'system_user',
'tan',
'time',
'timediff',
'timestamp',
'timestampadd',
'timestampdiff',
'time_format',
'time_to_sec',
'to_days',
'trim',
'truncate',
'ucase',
'uncompress',
'uncompressed_length',
'unhex',
'unix_timestamp',
'upper',
'user',
'utc_date',
'utc_time',
'utc_timestamp',
'uuid',
'var_pop',
'var_samp',
'variance',
'version',
'week',
'weekday',
'weekofyear',
'year',
'yearweek');
/* includes functions */
$this->reserved = array(
'abs',
'acos',
'adddate',
'addtime',
'aes_encrypt',
'aes_decrypt',
'against',
'ascii',
'asin',
'atan',
'avg',
'benchmark',
'bin',
'bit_and',
'bit_or',
'bitcount',
'bitlength',
'cast',
'ceiling',
'char',
'char_length',
'character_length',
'charset',
'coalesce',
'coercibility',
'collation',
'compress',
'concat',
'concat_ws',
'conection_id',
'conv',
'convert',
'convert_tz',
'cos',
'cot',
'count',
'crc32',
'curdate',
'current_user',
'currval',
'curtime',
'database',
'date_add',
'date_diff',
'date_format',
'date_sub',
'day',
'dayname',
'dayofmonth',
'dayofweek',
'dayofyear',
'decode',
'default',
'degrees',
'des_decrypt',
'des_encrypt',
'elt',
'encode',
'encrypt',
'exp',
'export_set',
'extract',
'field',
'find_in_set',
'floor',
'format',
'found_rows',
'from_days',
'from_unixtime',
'get_format',
'get_lock',
'group_concat',
'greatest',
'hex',
'hour',
'if',
'ifnull',
'in',
'inet_aton',
'inet_ntoa',
'insert',
'instr',
'interval',
'is_free_lock',
'is_used_lock',
'last_day',
'last_insert_id',
'lcase',
'least',
'left',
'length',
'ln',
'load_file',
'localtime',
'localtimestamp',
'locate',
'log',
'log2',
'log10',
'lower',
'lpad',
'ltrim',
'make_set',
'makedate',
'maketime',
'master_pos_wait',
'match',
'max',
'md5',
'microsecond',
'mid',
'min',
'minute',
'mod',
'month',
'monthname',
'nextval',
'now',
'nullif',
'oct',
'octet_length',
'old_password',
'ord',
'password',
'period_add',
'period_diff',
'pi',
'position',
'pow',
'power',
'quarter',
'quote',
'radians',
'rand',
'release_lock',
'repeat',
'replace',
'reverse',
'right',
'round',
'row_count',
'rpad',
'rtrim',
'sec_to_time',
'second',
'session_user',
'sha',
'sha1',
'sign',
'soundex',
'space',
'sqrt',
'std',
'stddev',
'stddev_pop',
'stddev_samp',
'strcmp',
'str_to_date',
'subdate',
'substring',
'substring_index',
'subtime',
'sum',
'sysdate',
'system_user',
'tan',
'time',
'timediff',
'timestamp',
'timestampadd',
'timestampdiff',
'time_format',
'time_to_sec',
'to_days',
'trim',
'truncate',
'ucase',
'uncompress',
'uncompressed_length',
'unhex',
'unix_timestamp',
'upper',
'user',
'utc_date',
'utc_time',
'utc_timestamp',
'uuid',
'var_pop',
'var_samp',
'variance',
'version',
'week',
'weekday',
'weekofyear',
'year',
'yearweek',
'add',
'all',
'alter',
'analyze',
'and',
'as',
'asc',
'asensitive',
'auto_increment',
'bdb',
'before',
'berkeleydb',
'between',
'bigint',
'binary',
'blob',
'both',
'by',
'call',
'cascade',
'case',
'change',
'char',
'character',
'check',
'collate',
'column',
'columns',
'condition',
'connection',
'constraint',
'continue',
'create',
'cross',
'current_date',
'current_time',
'current_timestamp',
'cursor',
'database',
'databases',
'day_hour',
'day_microsecond',
'day_minute',
'day_second',
'dec',
'decimal',
'declare',
'default',
'delayed',
'delete',
'desc',
'describe',
'deterministic',
'distinct',
'distinctrow',
'div',
'double',
'drop',
'else',
'elseif',
'enclosed',
'escaped',
'exists',
'exit',
'explain',
'false',
'fetch',
'fields',
'float',
'for',
'force',
'foreign',
'found',
'frac_second',
'from',
'fulltext',
'grant',
'group',
'having',
'high_priority',
'hour_microsecond',
'hour_minute',
'hour_second',
'if',
'ignore',
'in',
'index',
'infile',
'inner',
'innodb',
'inout',
'insensitive',
'insert',
'int',
'integer',
'interval',
'into',
'io_thread',
'is',
'iterate',
'join',
'key',
'keys',
'kill',
'leading',
'leave',
'left',
'like',
'limit',
'lines',
'load',
'localtime',
'localtimestamp',
'lock',
'long',
'longblob',
'longtext',
'loop',
'low_priority',
'master_server_id',
'match',
'mediumblob',
'mediumint',
'mediumtext',
'middleint',
'minute_microsecond',
'minute_second',
'mod',
'natural',
'not',
'no_write_to_binlog',
'null',
'numeric',
'on',
'optimize',
'option',
'optionally',
'or',
'order',
'out',
'outer',
'outfile',
'precision',
'primary',
'privileges',
'procedure',
'purge',
'read',
'real',
'references',
'regexp',
'rename',
'repeat',
'replace',
'require',
'restrict',
'return',
'revoke',
'right',
'rlike',
'second_microsecond',
'select',
'sensitive',
'separator',
'set',
'show',
'smallint',
'some',
'soname',
'spatial',
'specific',
'sql',
'sqlexception',
'sqlstate',
'sqlwarning',
'sql_big_result',
'sql_calc_found_rows',
'sql_small_result',
'sql_tsi_day',
'sql_tsi_frac_second',
'sql_tsi_hour',
'sql_tsi_minute',
'sql_tsi_month',
'sql_tsi_quarter',
'sql_tsi_second',
'sql_tsi_week',
'sql_tsi_year',
'ssl',
'starting',
'straight_join',
'striped',
'table',
'tables',
'terminated',
'then',
'timestampadd',
'timestampdiff',
'tinyblob',
'tinyint',
'tinytext',
'to',
'trailing',
'true',
'undo',
'union',
'unique',
'unlock',
'unsigned',
'update',
'usage',
'use',
'user_resources',
'using',
'utc_date',
'utc_time',
'utc_timestamp',
'values',
'varbinary',
'varchar',
'varcharacter',
'varying',
'when',
'where',
'while',
'with',
'write',
'xor',
'year_month',
'zerofill'
);
for($i=0;$i<count($this->reserved);++$i) {
$this->reserved[$i]=strtoupper($this->reserved[$i]);
if(!empty($this->functions[$i])) $this->functions[$i] = strtoupper($this->functions[$i]);
}
}
} // END CLASS
php-sql-parser sql防注入脚本的更多相关文章
- 万能写入sql语句,并且防注入
通过perpare()方法和检查字段防sql注入. $pdo=new PDO('mysql:host=localhost;dbname=scms', 'root' ); $_POST=array('t ...
- SQL防注入程序
1.在Global.asax.cs中写入: protected void Application_BeginRequest(Object sender,EventArgs e){ SqlIn ...
- SQL防注入程序 v1.0
/// ***************C#版SQL防注入程序 v1.0************ /// *使用方法: /// 一.整站防注入(推荐) /// 在Global.asax.cs中查找App ...
- PHP之SQL防注入代码集合(建站常用)
SQL防注入代码一 <?php if (!function_exists (quote)) { function quote($var) { if (strlen($var)) { $var=! ...
- phpcms v9 sql注入脚本
phpcms v9 SQL注入脚本 用法:python phpcms.py http://www.baidu.com import requests,sys,urllib url = sys.argv ...
- mybatis 的sql语句及使用mybatis的动态sql mybatis防注入
由于看到写的比较详细的文档这里将之前的删掉了,只留下一些我认为能帮助理解的和关于动态sql及防注入的一些理解.文档链接 :mybatis官方文档介绍 <!-- 根据条件查询用户 --> ...
- sql 防注入 维基百科
http://zh.wikipedia.org/wiki/SQL%E8%B3%87%E6%96%99%E9%9A%B1%E7%A2%BC%E6%94%BB%E6%93%8A SQL攻击(SQL inj ...
- .net 过滤 sql防注入类，省地以后每次都要重新弄！
/// <summary> /// 过滤不安全的字符串 /// </summary> /// <param name="Str"&g ...
- 特殊字符的过滤方法，防sql防注入代码的过滤方法
特殊字符的过滤方法 function strFilter($str){ //特殊字符的过滤方法 $str = str_replace('`', '', $str); $str = str_replac ...
随机推荐
- js 简易的分页器插件
1.自己引入jquery插件,我的demo是引入的自己本地的query <!DOCTYPE html> <html> <head> <meta charset ...
- CURL in windows
目前版本为: 7.50.3 >> 不同操作系统及版本的下载页面 https://curl.haxx.se/download/?C=M;O=D Windows上的下载入口及地址为: htt ...
- Sublime Text3 以及 SublimeREPL使用Virtualenv执行python
1. SublimeText3 安装Virtualenv插件(Crtl+Shift+P) 2. 新建python虚拟环境: Crtl+Shift+P,选中Virtualenv:New选项,在底部Vir ...
- Android四大核心组件之ContentProvider
实验内容 学习ContextProvider用法 编码实现简单ContextProvider功能 实验要求 通过简单代码了解ContextProvider功能和用法 实验步骤 ContextProvi ...
- ko trick
(1)let a = ko.observable(‘A’)绑定到select,如果下拉列表中找不到'A', 变量a会赋值成undefined. 要解决此问题可以使用绑定valueAllowUnse ...
- jsp作为服务端，ajax请求回应
刚学ajax,想以jsp作为服务端,来回应ajax的请求: 代码如下: <!DOCTYPE html> <html> <head lang="en"& ...
- 虚拟机下CentOS 6.5配置IP地址的三种方法
实验软件环境:虚拟机Vmware Workstation10.0 .CentOS 6.5 32位 1.自动获取IP地址 虚拟机使用桥接模式,相当于连接到物理机的网络里,物理机网络有DHCP服务器自动分 ...
- IOS关于不同字体和不同颜色的选择
在项目中,用到一个功能,就是不同文字和不同颜色字体选择, 界面如下:,效果如下: 这个功能主要用到了textview的几个代理办法,其中一个重要的问题就是,在英文下和英文下的不同判断方式,以及是否有追 ...
- MFC打开系统关于对话框
HICON Icon = LoadIcon(AfxGetInstanceHandle(),MAKEINTRESOURCE(IDR_MAINFRAME)); //IDR_MAINFRAME为图标的ID ...
- 导出Excel And 导出word
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default6.aspx. ...