php - 如何使用 PDO 避免 mysql 注入(inject)

Question

如何避免mysql注入(inject)？这是我现在拥有的 PHP 文件

<?php
include 'config.php';

$Name = $_GET['Name'] ;

$sql = "Select * from tables where names =\"$Name\"";



try {
    $dbh = new PDO("mysql:host=$dbhost;dbname=$dbname", $dbuser, $dbpass);
    $dbh->query('SET CHARACTER SET utf8');
    $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $stmt = $dbh->query($sql);  
    $names = $stmt->fetchAll(PDO::FETCH_OBJ);
    $dbh = null;
    echo '{"key":'. json_encode($names) .'}'; 
} catch(PDOException $e) {
    echo '{"error":{"text":'. $e->getMessage() .'}}'; 
}


?>

当我输入 $stmt = $dbh->query($sql); $stmt->execute(array(':name' => $name)); 到它不起作用的代码。那我应该怎么做呢？

Answer 1

了解 pdo prepared statements

举个例子

$stmt = $dbh->prepare("SELECT * FROM tables WHERE names = :name");
$stmt->execute(array(':name' => $name));