I方法 thinkphp

function I($name,$default=null,$filter=null,$datas=null) {
static $_PUT = null;
$default_filter='htmlspecialchars';
if(strpos($name,'/')){ // 指定修饰符
list($name,$type) = explode('/',$name,2);
}
if(strpos($name,'.')) { // 指定参数来源
list($method,$name) = explode('.',$name,2);
}else{ // 默认为自动判断
$method = 'param';
}
switch(strtolower($method)) {
case 'get' :
$input =& $_GET;
break;
case 'post' :
$input =& $_POST;
break;
case 'put' :
if(is_null($_PUT)){
parse_str(file_get_contents('php://input'), $_PUT);
}
$input = $_PUT;
break;
case 'param' :
switch($_SERVER['REQUEST_METHOD']) {
case 'POST':
$input = $_POST;
break;
case 'PUT':
if(is_null($_PUT)){
parse_str(file_get_contents('php://input'), $_PUT);
}
$input = $_PUT;
break;
default:
$input = $_GET;
}
break;
case 'request' :
$input =& $_REQUEST;
break;
case 'session' :
$input =& $_SESSION;
break;
case 'cookie' :
$input =& $_COOKIE;
break;
case 'server' :
$input =& $_SERVER;
break;
case 'globals' :
$input =& $GLOBALS;
break;
default:
return null;
}

if(''==$name) { // 获取全部变量
$data = $input;
$filters = isset($filter)?$filter:$default_filter;
if($filters) {
if(is_string($filters)){
$filters = explode(',',$filters);
}
foreach($filters as $filter){
$data = array_map_recursive($filter,$data); // 参数过滤
}
}
}elseif(isset($input[$name])) { // 取值操作
$data = $input[$name];
$filters = isset($filter)?$filter:$default_filter;

if($filters) {
if(is_string($filters)){
if(0 === strpos($filters,'/')){
if(1 !== preg_match($filters,(string)$data)){
// 支持正则验证
return isset($default) ? $default : null;
}
}else{
$filters = explode(',',$filters);
}
}elseif(is_int($filters)){
$filters = array($filters);
}

if(is_array($filters)){
foreach($filters as $filter){

// exit;
if(function_exists($filter)) {

$data = is_array($data) ? array_map_recursive($filter,$data) : $filter($data); // 参数过滤
}else{

$data = filter_var($data,is_int($filter) ? $filter : filter_id($filter));
if(false === $data) {
return isset($default) ? $default : null;
}
}
}
}
}

if(!empty($type)){
switch(strtolower($type)){
case 'a': // 数组
$data = (array)$data;
break;
case 'd': // 数字
$data = (int)$data;
break;
case 'f': // 浮点
$data = (float)$data;
break;
case 'b': // 布尔
$data = (boolean)$data;
break;
case 's': // 字符串
default:
$data = (string)$data;
}
}
}else{ // 变量默认值
$data = isset($default)?$default:null;
}

is_array($data) && array_walk_recursive($data,'think_filter');
return $data;
}

function think_filter(&$value){
// TODO 其他安全过滤

// 过滤查询特殊字符
if(preg_match('/^(EXP|NEQ|GT|EGT|LT|ELT|OR|XOR|LIKE|NOTLIKE|NOT BETWEEN|NOTBETWEEN|BETWEEN|NOTIN|NOT IN|IN)$/i',$value)){
$value .= ' ';
}
}
function array_map_recursive($filter, $data) {
$result = array();
foreach ($data as $key => $val) {
$result[$key] = is_array($val)
? array_map_recursive($filter, $val)
: call_user_func($filter, $val);
}
return $result;
}