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PDO预处理语句规避SQL注入攻击

时间：2021-07-01 10:21:17 帮助过：17人阅读

= "mysql:dbname=study;host=localhost"; $pdo = new PDO($dsn,"root","root"); //写一个预处理语句 $sql = "insert into class values(?,?)"; //将预处理语句扔到服务器等待执行，返回PDOStatement对象 $stm = $pdo->prepare($sql); //第二次将变量（参数）扔到服务器的SQL语句相应位置，给预处理语句绑定参数 $stm->bindParam(1,$Sclass); $stm->bindParam(2,$cla); $Sclass = "7"; $cla = "七班"; //执行 $stm->execute();

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第一种方法简写

<?php
$dsn = "mysql:dbname=study;host=localhost";
$pdo = new PDO($dsn,"root","root");
 
//写一个预处理语句
$sql = "insert into class values(?,?)";
//将预处理语句扔到服务器等待执行，返回PDOStatement对象
$stm = $pdo->prepare($sql);
//定义索引数组
$arr = array("8","八班");
//执行
$stm->execute($arr);

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第二种方法

<?php
$dsn = "mysql:dbname=study;host=localhost";
$pdo = new PDO($dsn,"root","root");
//预处理语句
$sql = "insert into class VALUES (:Sclass,:cla)";
$stm = $pdo->prepare($sql);
 
//造一个数组
$arr = array("Sclass"=>"10","cla"=>"十班");
 
//执行
$stm->execute($arr);

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举例，第二种情况简单，建议应用第二种方法

<body xmlns="http://www.w3.org/1999/html">
<h1>添加数据</h1>
<form action="pdoycl5.php" method="post"/>
<div>代号：<input type="text" name="Sclass"> </div>
<div>班级：<input type="text" name="cla"> </div>
<input type="submit" value="添加">
</form>
</body>

<?php
$dsn = "mysql:dbname=study;host=localhost";
$pdo = new PDO($dsn,"root","root");
//预处理语句
$sql = "insert into class VALUES (:Sclass,:cla)";
$stm = $pdo->prepare($sql);
//执行
$stm->execute($_POST);

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PDO预处理语句规避SQL注入攻击

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PDO预处理语句规避SQL注入攻击

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