PHP 7.2-警告:count():参数必须是实现Countable的数组或对象 [英] PHP 7.2 - Warning: count(): Parameter must be an array or an object that implements Countable

问题描述

我刚刚将我的 PHP版本从 5.6 升级到了 7.2 .我在登录页面中使用了count()函数，例如:

I just upgraded my PHP Version from 5.6 to 7.2. I used count() function in my login page, example:

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，我发现了与此问题类似的问题和答案，但是它们与WordPress有关，他们修改了一些文件，但是我找不到使用 Pure PHP 的解决方案.

After searching, I found questions and answers similar to this one but they were related to WordPress that they modified some files, but I couldn't find a solution for it using Pure PHP.

推荐答案

PDO fetch失败时返回false.因此，您也需要检查这种情况:

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';
}

这篇关于PHP 7.2-警告:count():参数必须是实现Countable的数组或对象的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！