一个强大的封装好的pdo处理类

php5.5后就不支持mysql扩展了，也就是说这以后都不能使用msyql_conncet之类的函数了。不过没有关系，pdo比mysql有更多优势，写法也很简单，下面贴出一个来自互联网的pdo处理类。本来自己写了一个开头，一直没时间完善，现在急用，就在网上找这个现成的，看好不好用。

class CPdo{

protected $_dsn = "mysql:host=localhost;dbname=test";
protected $_name = "root";
protected $_pass = "";
protected $_condition = array();
protected $pdo;
protected $fetchAll;
protected $query;
protected $result;
protected $num;
protected $mode;
protected $prepare;
protected $row;
protected $fetchAction;
protected $beginTransaction;
protected $rollback;
protected $commit;
protected $char;
private static $get_mode;
private static $get_fetch_action;

/**
*pdo construct
*/
public function __construct($pconnect = false) {

   $this->_condition = array(PDO::ATTR_PERSISTENT => $pconnect);
   $this->pdo_connect();
}

/**
*pdo connect
*/
private function pdo_connect() {

   try{
    $this->pdo = new PDO($this->_dsn,$this->_name,$this->_pass,$this->_condition);
   } catch(Exception $e) {
    return $this->setExceptionError($e->getMessage(), $e->getline, $e->getFile);
   } 

}

/**
*self sql get value action
*/
public function getValueBySelfCreateSql($sql, $fetchAction = "assoc",$mode = null) {

   $this->fetchAction = $this->fetchAction($fetchAction);
   $this->result = $this->setAttribute($sql, $this->fetchAction, $mode);
   $this->AllValue = $this->result->fetchAll();
   return $this->AllValue;
}

/**
*select condition can query
*/
private function setAttribute($sql, $fetchAction, $mode) {

   $this->mode = self::getMode($mode);
   $this->fetchAction = self::fetchAction($fetchAction);
   $this->pdo->setAttribute(PDO::ATTR_CASE, $this->mode);
   $this->query = $this->base_query($sql);
   $this->query->setFetchMode($this->fetchAction);
   return $this->query;
}

/**
*get mode action
*/
private static function getMode($get_style){

   switch($get_style) {
    case null:
     self::$get_mode = PDO::CASE_NATURAL;
    break;
    case true:
     self::$get_mode = PDO::CASE_UPPER;
    break;
    case false;
     self::$get_mode= PDO::CASE_LOWER;
    break;
   }
   return self::$get_mode;

}

/**
*fetch value action
*/
private static function fetchAction($fetchAction) {

   switch($fetchAction) {
    case "assoc":
     self::$get_fetch_action = PDO::FETCH_ASSOC; //asso array
    break;
    case "num":
     self::$get_fetch_action = PDO::FETCH_NUM;//num array
    break;
    case "object":
     self::$get_fetch_action = PDO::FETCH_OBJ; //object array
    break;
    case "both":
     self::$get_fetch_action = PDO::FETCH_BOTH;//assoc array and num array
    break;
    default:
     self::$get_fetch_action = PDO::FETCH_ASSOC;
    break;
   }

   return self::$get_fetch_action;
}

/**
*get total num action
*/
public function rowCount($sql) {

   $this->result = $this->base_query($sql);
   $this->num = $this->result->rowCount();
   return $this->num;

}

/*
*simple query and easy query action
*/
public function query($table, $column = "*",$condition = array(), $group = "",$order = "", $having = "", $startSet = "",$endSet = "",$fetchAction = "assoc",$params = null){

   $sql = "select ".$column." from `".$table."` ";
   if ($condition != null) {

    foreach($condition as $key=>$value) {
     $where .= "$key = '$value' and ";
    }

    $sql .= "where $where";
    $sql .= "1 = 1 ";
   }

   if ($group != "") {
    $sql .= "group by ".$group." ";
   }

   if ($order != "") {
    $sql .= " order by ".$order." ";
   }
   if ($having != "") {
    $sql .= "having '$having' ";
   }
   if ($startSet != "" && $endSet != "" && is_numeric($endSet) && is_numeric($startSet)) {
    $sql .= "limit $startSet,$endSet";
   }
   $this->result = $this->getValueBySelfCreateSql($sql, $fetchAction, $params);
   return $this->result;
}

/**
*execute delete update insert and so on action
*/
public function exec($sql) {

   $this->result = $this->pdo->exec($sql);
   $substr = substr($sql, 0 ,6);
   if ($this->result) {
    return $this->successful($substr);
   } else {
    return $this->fail($substr);
   }

}

/**
*prepare action
*/
public function prepare($sql) {

   $this->prepare = $this->pdo->prepare($sql);
   $this->setChars();
   $this->prepare->execute();
   while($this->rowz = $this->prepare->fetch()) {

    return $this->row;

   }
}

/**
*USE transaction
*/
public function transaction($sql) {

   $this->begin();
   $this->result = $this->pdo->exec($sql);
   if ($this->result) {
    $this->commit();
   } else {
    $this->rollback();
   }
}

/**
*start transaction
*/
private function begin() {

   $this->beginTransaction = $this->pdo->beginTransaction();
   return $this->beginTransaction;
}

/**
*commit transaction
*/
private function commit() {

   $this->commit = $this->pdo->commit();
   return $this->commit;
}

/**
*rollback transaction
*/
private function rollback() {

   $this->rollback = $this->pdo->rollback();
   return $this->rollback;
}
/**
*base query
*/
private function base_query($sql) {

   $this->setChars();
   $this->query = $this->pdo->query($sql);
   return $this->query;

}

/**
*set chars
*/
private function setChars() {

   $this->char = $this->pdo->query("SET NAMES 'UTF8'");
   return $this->char;
}

/**
*process sucessful action
*/
private function successful($params){

   return "The ".$params." action is successful";
}

/**
*process fail action
*/
private function fail($params){

   return "The ".$params." action is fail";
}

/**
*process exception action
*/
private function setExceptionError($getMessage, $getLine ,$getFile) {

   echo "Error message is ".$getMessage."<br /> The Error in ".$getLine." line <br /> This file dir on ".$getFile;
    exit();
}
}