代码如下:
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));
?>
@H_404_0@1 建立连接
@H_404_0@ 代码如下:
true
));
?>
@H_404_0@持久性链接PDO::ATTR_PERSISTENT=>true
@H_404_0@2. 捕捉错误
@H_404_0@ 代码如下:
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(); } ?>
@H_404_0@3. 事务的
@H_404_0@"; die(); } ?>
代码如下:
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();
}
?>
@H_404_0@4. 错误处理
@H_404_0@a. 静默模式(默认模式)
@H_404_0@ 代码如下:
setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_SILENT); //不显示错误
$dbh->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_WARNING);//显示警告错误，并继续执行
$dbh->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);//产生致命错误，PDOException
@H_404_0@ 代码如下:
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: ' . $e->getMessage(); } ?>
@H_404_0@1. 使用 query()
@H_404_0@'; echo 'sql Query: ',$sql; echo 'Error: ' . $e->getMessage(); } ?>
代码如下:
query($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 $row['Population'] . "/n";
}
?>
@H_404_0@2. 使用 prepare,bindParam和 execute [建议用,同时可以用添加、修改、删除]
@H_404_0@ 代码如下:
prepare($sql); 产生了个PDOStatement对象
@H_404_0@PDOStatement->bindParam()
@H_404_0@PDOStatement->execute();//可以在这里放绑定的相应变量
?>
@H_404_0@3. 事物
@H_404_0@ 代码如下:
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();
}
?>
@H_404_0@以上就是关于PHP中pdo的相关用法的全部内容了，希望本文能对大家有所帮助，也希望大家能够喜欢。