<?php/** * PDO封装类，目的是为了使用起来更简单方便 * modify Date: 2014-07-01 */class PDOX { private $pdo
= null; public $statement = null; public $options = array( PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES ", ); public function __construct($dsn, $user = '', $pass = '', $persistent = false, $charset = "utf8"){ $this->options[PDO::MYSQL_ATTR_INIT_COMMAND] .= $charset; if($persistent){ $this->options[PDO::ATTR_PERSISTENT] = true; } $this->pdo = new PDO($dsn, $user, $pass, $this->options); } /** 全局属性设置，包括：列名格式和错误提示类型 可以使用数字也能直接使用参数 */ public function setAttr($param, $val = ''){ if(is_array($param)){ foreach($param as $key => $val){ $this->pdo->setAttribute($key, $val); } }else{ if($val != '' ){ $this->pdo->setAttribute($param, $val); }else{ return false; } } } /** 生成一个编译好的sql语句模版 你可以使用 ? :name 的形式 返回一个statement对象 */ public function prepare($sql){ if(empty($sql)){ return false; } $this->statement = $this->pdo->prepare($sql); return $this->statement; } /** 执行Sql语句，一般用于 增、删、更新或者设置 返回影响的行数 */ public function exec($sql){ if(empty($sql)){ return false; } try{ return $this->pdo->exec($sql); }catch(Exception $e){ return $e->getMessage(); } } /** 执行有返回值的查询，返回PDOStatement 可以通过链式操作，可以通过这个类封装的操作获取数据 */ public function query($sql){ if(empty($sql)){ return false; } $this->statement = $this->pdo->query($sql); return $this->statement; } /** 开启事务 */ public function beginTransaction(){ return $this->pdo->beginTransaction(); } /** 提交事务 */ public function commit(){ return $this->pdo->commit(); } /** 事务回滚 */ public function rollBack(){ return $this->pdo->rollBack(); } public function lastInertId(){ return $this->pdo->lastInsertId(); } //** PDOStatement 类操作封装 **// /** 让模版执行SQL语句，1、执行编译好的 2、在执行时编译 */ public function execute($param = ""){ if(is_array($param)){ try{ return $this->statement->execute($param); }catch (Exception $e){ //return $this->errorInfo(); return $e->getMessage(); } }else{ try{ return $this->statement->execute(); }catch(Exception $e){ /* 返回的错误信息格式 [0] => 42S22 [1] => 1054 [2] => Unknown column 'col' in 'field list' return $this->errorInfo(); */ return $e->getMessage(); } } } /** 参数1说明： PDO::FETCH_BOTH
也是默认的，两者都有（索引，关联） PDO::FETCH_ASSOC
关联数组 PDO::FETCH_NUM
索引 PDO::FETCH_OBJ
对象 PDO::FETCH_LAZY
对象 会附带queryString查询SQL语句 PDO::FETCH_BOUND
如果设置了bindColumn，则使用该参数 */ public function fetch($fetch_type = PDO::FETCH_ASSOC){ if(is_object($this->statement)){ return $this->statement->fetch($fetch_type); } return false; } /** 参数1说明： PDO::FETCH_BOTH
也是默认的，两者都有（索引，关联） PDO::FETCH_ASSOC
关联数组 PDO::FETCH_NUM
索引 PDO::FETCH_OBJ
对象 PDO::FETCH_COLUMN
指定列 参数2可以指定要获取的列 PDO::FETCH_CLASS
指定自己定义的类 PDO::FETCH_FUNC
自定义类 处理返回的数据 PDO_FETCH_BOUND
如果你需要设置bindColumn，则使用该参数 参数2说明： 给定要处理这个结果的类或函数 */ public function fetchAll($fetch_type = PDO::FETCH_ASSOC, $handle = ''){ if(empty($handle)){ return $this->statement->fetchAll($fetch_type); } return $this->statement->fetchAll($fetch_type, $handle); } /** 以对象形式返回 结果 跟fetch(PDO::FETCH_OBJ)一样 */ public function fetchObject($class_name){ if(empty($clss_name)){ return $this->statement->fetchObject(); } return $this->statement->fetchObject($class_name); } public function fetchColumn($intColumn = 0){ return $this->statement->fetchColumn($intColumn); } /** public function bindColumn($array=array(),$type=EXTR_OVERWRITE){ if(count($array)>0){ extract($array,$type); } //$this->statement->bindColumn() } */ /** 以引用的方式绑定变量到占位符(可以只执行一次prepare，执行多次bindParam达到重复使用的效果) */ public function bindParam($parameter, $variable, $data_type = 'STR', $length = 0){ switch ($data_type){ case 'STR': $data_type = PDO::PARAM_STR; break; case 'INT': $data_type = PDO::PARAM_INT; break; default : $data_type = ''; break; } return $this->statement->bindParam($parameter, $variable, $data_type, $length); } /** 返回statement记录集的行数 */ public function rowCount(){ return $this->statement->rowCount(); } public function count(){ return $this->statement->rowCount(); } public function columnCount(){ $this->statement->execute(); return $this->statement->columnCount(); } public function getColumnMeta($intColumn){ return $this->statement->getColumnMeta($intColumn); } /** 关闭 */ public function close(){ return $this->statement->closeCursor(); } public function closeCursor(){ return $this->statement->closeCursor(); } /** 返回错误信息也包括错误号 */ private function errorInfo(){ return $this->statement->errorInfo(); } /** 返回错误号 */ private function errorCode(){ return $this->statement->errorCode(); } //简化操作 public function insert($table, $data){ if(!is_array($data)){ return false; } $cols = array(); $vals = array(); foreach($data as $key => $val){ $cols[] = $key; $vals[] = "'" . $val . "'"; } $sql = "INSERT INTO {$table} ("; $sql .= implode(",", $cols) . ") VALUES ("; $sql .= implode(",", $vals) . ")"; return $this->exec($sql); } public function insertBind($table, $arrayData){ if(!is_array($arrayData)){ return false; } $vals = array_keys($arrayData); $cols = array(); /* $arrayobject = new ArrayObject( $arrayData ); $iterator
= $arrayobject->getIterator(); while($iterator->valid()) { $vals[] = ':' . $iterator->key() . ''; $iterator->next(); } */ $c
= implode('', $vals); $cols = array_filter(explode(':', $c)); $sql = "INSERT INTO {$table} ("; $sql .= implode(",", $cols) . ") VALUES ("; $sql .= implode(",", $vals) . ")"; $this->statement = $this->pdo->prepare($sql); $this->statement->execute($arrayData); return $this->statement->rowCount(); } public function update($table, $data, $where){ if(!is_array($data)){ return false; } $set = array(); foreach($data as $key => $val){ $set[] = $key . "='" . $val . "'"; } $sql = "UPDATE {$table} SET "; $sql .= implode(",", $set); $sql .= " WHERE " . $where; return $this->exec($sql); } public function updateBind($sql, $arrayWhere){ if(empty($sql) || !is_array($arrayWhere)){ return false; } $this->statement = $this->pdo->prepare($sql); $this->statement->execute($arrayWhere); return $this->statement->rowCount(); } public function delete($table, $where){ if(empty($table) || empty($where)){ return false; } $sql = "DELETE FROM {$table} WHERE " . $where; return $this->exec($sql); } public function deleteBind($sql, $arrayWhere){ if(empty($sql) || !is_array($arrayWhere)){ return false; } $this->statement = $this->pdo->prepare($sql); $this->statement->execute($arrayWhere); return $this->statement->rowCount(); }}?>