php基于PDO实现功能强大的MYSQL封装类实例

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(); }}