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mysqli面向对象实现更新操作
一枝黄花
Original
641 people have browsed it

使用PDO实现预处理更新过程

实例

<?php
/**
 * 预处理更新数据
 */

//1.连接数据库,创建pdo对象
try {
$pdo = new PDO('mysql:dbname=php','root','root');
} catch (PDOException $e) {
    exit($e->getMessage());
}

//2.准备sql语句
$sql = "UPDATE user SET email=:email WHERE user_id=:user_id";

//3.创建预处理对象stmt对象
if($stmt = $pdo->prepare($sql)) {

    //4.将参数绑定到stmt对象并执行

    //准备参数
    $param = ['email'=>'lwt@qq.com','user_id'=>5];

    //绑定参数到SQL语句对象并执行
    if ($stmt -> execute($param)){
        //rowCount()返回更新的数量,如果大于0表示有记录被更新啦
        if ($stmt->rowCount()>0) {
            echo '成功更新了'.$stmt->rowCount().'条记录';
        } else {  //等于0表示没有记录被更新
            echo '没有记录被更新';
        }
    } else { //执行失败的信息
        print_r($stmt->errorInfo());
        exit();
    }

} else {  //$stmt语句对象创建失败
  print_r($pdo->errorInfo());
  exit();
}

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Correction status:Uncorrected

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