本文介绍了PHP 7.2 - 警告:count():参数必须是一个数组或一个实现 Countable 的对象的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我刚刚将我的 PHP 安装从 5.6 升级到了 7.2.我在登录页面上使用了 count()
函数,如下所示:
I just upgraded my PHP installation from version 5.6 to 7.2. I used the count()
function on my login page like so:
if (!empty($_POST['username']) && !empty($_POST['password'])):
$records = $conn->prepare('SELECT id,username,password FROM users WHERE username = :username');
$records->bindParam(':username', $_POST['username']);
$records->execute();
$results = $records->fetch(PDO::FETCH_ASSOC);
$message = '';
if (count($results) > 0 && password_verify($_POST['password'], $results['password'])) {
$_SESSION['user_id'] = $results['id'];
header("Location: /");
} else {
$message = 'Sorry, those credentials do not match';
}
endif;
搜索后,找到了类似的问题和答案,但都与WordPress有关,我找不到纯PHP的解决方案.
After searching, I found questions and answers similar to this one, but they all were related to WordPress, and I couldn’t find a solution for Pure PHP.
推荐答案
PDO fetch
在失败时返回 false.所以你也需要检查这个案例:
PDO fetch
returns false on failure. So you need to check this case too:
if ($results && count($results) > 0 && password_verify($_POST['password'], $results['password'])) {
$_SESSION['user_id'] = $results['id'];
header("Location: /");
} else {
$message = 'Sorry, those credentials do not match';
}
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