PHP ID 循环仅适用于第一个 ID

Question

我目前正在构建一个具有一些不错 Material 设计的轻量级博客平台，但我遇到了运行问题。我有一个带 ID 的 table，我想在我的 table 中更改 public 的值，以便您可以隐藏博客中的文章，为此我做了一个循环，但它只是适用于其他 ID 的第一个 ID 和 none。这是我的代码：

        try {
        if (isset($_POST['submit'])) {
            $stmt = $db->query('SELECT postID FROM blog_posts ORDER BY postID DESC');

            while ($row = $stmt->fetch()) {
                // set public based on the submitted value from your form
                $public = empty($_POST['public'][$row['postID']]) ? 0 : 1;

                // do the update
                $stmt = $db->prepare('UPDATE blog_posts SET public = ? WHERE postID = ?');
                $stmt->execute(array($public, $row['postID']));
                header('Location: index.php');
            }
        }
    } catch (PDOException $e) {
        echo $e->getMessage();
    }

如果有用的话here is my full page of PHP, also my fully loaded page can be found here

提前致谢。

Answer 1

请将此 header('Location: index.php'); 放在 while 循环之外，不要覆盖 $stmt 而是使用另一个：

//.......
//.......
while ($row = $stmt->fetch()) {

    // set public based on the submitted value from your form    
    $public = empty($_POST['public'][$row['postID']]) ? 0 : 1;

    // do the update  
    //Create another statement
    $stmt2 = $db->prepare('UPDATE blog_posts SET public = ? WHERE postID = ?');
    $stmt2->execute(array(
        $public,
        $row['postID']
    ));
}

header('Location: index.php');
//.......
//.......

PHP ID 循环仅适用于第一个 ID

PHP While loop of ID's only works with first id

php

mysql

material-design-lite