PHP PDO MySQL LIKE和准备好的语句

Question

假设$search是来自用户输入的字符串,并且$db是有效的PDO引用.

根据我的理解,以下块是首选,应该工作:

$imageStatement = $db->prepare("SELECT
images.whatever
FROM images
WHERE images.title LIKE :titleSearch OR images.description LIKE :descriptionSearch");
$imageStatement->bindValue(':titleSearch', "%{$search}%");
$imageStatement->bindValue(':descriptionSearch', "%{$search}%");
$images = $imageStatement->fetchAll();

它返回0结果,而以下返回预期回报:

$search = $db->quote("%{$search}%");
$images = $db->query("SELECT
images.whatever
FROM images
WHERE images.title LIKE {$search} OR images.description LIKE {$search}")->fetchAll();

我究竟做错了什么？

Answer 1

您从未执行过您的PDO声明.绑定参数后,请execute在检索结果之前调用.

$imageStatement->bindValue(':titleSearch', "%{$search}%");
$imageStatement->bindValue(':descriptionSearch', "%{$search}%");
$imageStatement->execute(); //ADD THIS STATEMENT
$images = $imageStatement->fetchAll();

PDO的query功能不需要您调用execute,因为它不是参数化查询.