-
-
$dbh = new PDO('mysql:host=localhost;dbname=access_control', 'root', '');
- $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
- $dbh->exec('set names utf8');
- /*添加*/
- //$sql = "INSERT INTO `user` SET `login`=:login AND `password`=:password";
- $sql = "INSERT INTO `user` (`login` ,`password`)VALUES (:login, :password)"; $stmt = $dbh->prepare($sql); $stmt->execute(array(':login'=>'kevin2',':password'=>''));
- echo $dbh->lastinsertid();
- /*修改*/
- $sql = "UPDATE `user` SET `password`=:password WHERE `user_id`=:userId";
- $stmt = $dbh->prepare($sql);
- $stmt->execute(array(':userId'=>'7', ':password'=>'4607e782c4d86fd5364d7e4508bb10d9'));
- echo $stmt->rowCount();
- /*删除*/
- $sql = "DELETE FROM `user` WHERE `login` LIKE 'kevin_'"; //kevin%
- $stmt = $dbh->prepare($sql);
- $stmt->execute();
- echo $stmt->rowCount();
- /*查询*/
- $login = 'kevin%';
- $sql = "SELECT * FROM `user` WHERE `login` LIKE :login";
- $stmt = $dbh->prepare($sql);
- $stmt->execute(array(':login'=>$login));
- while($row = $stmt->fetch(PDO::FETCH_ASSOC)){
- print_r($row);
- }
- print_r( $stmt->fetchAll(PDO::FETCH_ASSOC));
- ?>
1、建立连接
-
-
$dbh=newPDO('mysql:host=localhost;port=3306; dbname=test',$user,$pass,array(
- PDO::ATTR_PERSISTENT=>true
- ));
- ?>
-
持久性链接PDO::ATTR_PERSISTENT=>true
2，捕捉错误
-
-
try{
- $dbh=newPDO('mysql:host=localhost;dbname=test',$user,$pass);
- $dbh->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);
- $dbh->exec("SET CHARACTER SET utf8");
- $dbh=null; //断开连接
- }catch(PDOException$e){
- print"Error!:".$e->getMessage()."
";
- die();
- }
- ?>
3，pdo事务
-
-
try{
- $dbh->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);
- $dbh->beginTransaction();//开启事务
- $dbh->exec("insertintostaff(id,first,last)values(23,'Joe','Bloggs')");
- $dbh->exec("insertintosalarychange(id,amount,changedate)
- values(23,50000,NOW())");
- $dbh->commit();//提交事务
- }catch(Exception$e){
- $dbh->rollBack();//错误回滚
- echo"Failed:".$e->getMessage();
- }
- ?>
-
4. 错误处理
a. 静默模式(默认模式)
-
-
try{
- $dbh = new PDO($dsn, $user, $password);
- $sql = 'Select * from city where CountryCode =:country';
- $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
- $stmt = $dbh->prepare($sql);
- $stmt->bindParam(':country', $country, PDO::PARAM_STR);
- $stmt->execute();
- while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
- print $row['Name'] . "/t";
- }
- } // if there is a problem we can handle it here
- catch (PDOException $e) {
- echo 'PDO Exception Caught. ';
- echo 'Error with the database:
';
- echo 'SQL Query: ', $sql;
- echo 'Error: ' . $e->getMessage();
- }
- ?>
1，使用 query()
-
-
$dbh->query($sql); 当$sql 中变量可以用$dbh->quote($params); //转义字符串的数据
- $sql = 'Select * from city where CountryCode ='.$dbh->quote($country);
- foreach ($dbh->query($sql) as $row) {
- print $row['Name'] . "/t";
- print $row['CountryCode'] . "/t";
- print $row['Population'] . "/n";
- }
- ?>
2，使用 prepare, bindParam和 execute [建议用,同时可以用添加、修改、删除]
-
-
$dbh->prepare($sql); 产生了个PDOStatement对象
- PDOStatement->bindParam()
- PDOStatement->execute();//可以在这里放绑定的相应变量
- ?>
3、php pdo事务例子
-
-
try {
- $dbh = new PDO('mysql:host=localhost;dbname=test', 'root', '');
- $dbh->query('set names utf8;');
- $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
- $dbh->beginTransaction();
- $dbh->exec("Insert INTO `test`.`table` (`name` ,`age`)VALUES ('mick', 22);");
- $dbh->exec("Insert INTO `test`.`table` (`name` ,`age`)VALUES ('lily', 29);");
- $dbh->exec("Insert INTO `test`.`table` (`name` ,`age`)VALUES ('susan', 21);");
- $dbh->commit();
- } catch (Exception $e) {
- $dbh->rollBack();
- echo "Failed: " . $e->getMessage();
- }
- ?>
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