Question

我最近开始使用php PDO来防止SQL注入，但是我对语句有问题，因为它会根据我通过URL传递的参数来改变页面结果。我正在努力的部分是当URL有一个cat_id到我的执行数组时，如何添加$_GET['cat_id']。这是一个工作版本，但很明显很容易注入SQL，提前感谢任何帮助！

PHP

$and = '';
if (isset($_GET['cat_id'])) {
    $and = "AND art_cat_id = ".$_GET['cat_id'];
}   

$statement_article = $db->prepare("SELECT * FROM app_articles WHERE art_sta_id = :art_sta_id $and ORDER BY art_date DESC");

$statement_article->setFetchMode(PDO::FETCH_ASSOC); 

$statement_article->execute(array(':art_sta_id' => "1"));

这是我尝试的内容，但如果网址中没有cat_id则会失败。

PHP

$and = '';
if (isset($_GET['cat_id'])) {
    $and = "AND art_cat_id = :cat_id";
}


$statement_article = $db->prepare("SELECT * FROM app_articles WHERE art_sta_id = :art_sta_id $and ORDER BY art_date DESC");

$statement_article->setFetchMode(PDO::FETCH_ASSOC); 

$statement_article->execute(array(':art_sta_id' => "1",':cat_id' => $_GET['cat_id']));

Answer 1

当有cat_id时调整参数数组：

$and = '';
$params = array(':art_sta_id' => "1");

if (isset($_GET['cat_id'])) 
{
  $and = "AND art_cat_id = :cat_id"
  $params[':cat_id'] = $_GET['cat_id'];
}   

$statement_article = $db->prepare("SELECT * FROM app_articles WHERE art_sta_id = :art_sta_id $and ORDER BY art_date DESC");

$statement_article->setFetchMode(PDO::FETCH_ASSOC); 

$statement_article->execute($params);

具有不同参数计数的PHP PDO语句

1 个答案: