php - 从复选框php和mysql中删除超过1个条目

Question

我使用以下代码从另一个用 php 编写的页面中删除复选框数组，但我一次只能删除 1 个条目

<?php
    $checked = "";
    $status  = (isset($_REQUEST['status'])); //Checks if any checkboxes have been selected
    if ($status == 'checked') {
        $status  = 1;
        $checked = 'checked="checked"'; 

        $value = $_POST['status']; //Uses the value of the checkbox

        foreach ($value as $val) { //Loops through all of the checkboxes that have been selected
            $sql = "DELETE FROM users WHERE ID='$val'"; //Mysql code to delete from the databases where items have been selected

            if ($conn->query($sql) === TRUE) { //If a value has been deleted 
                echo "Record deleted successfully: "; 
            } else {
                echo "Error deleting record: " . $conn->error; //Prints error if value hasnt deleted
            }
            $conn->close();//Closes sql connection
            echo $val; //Echos values selected
            echo '</br>';
        }
    } else {
        $status = 0;
    }
    echo <<<END
    END;
    ?>    

Answer 1

首先，您直接将发布的数据插入到 SQL 查询中 — 甚至是 DELETE 查询!恶意用户可以轻松利用此代码删除数据库的全部内容。

ALWAYS 转义 SQL 语句中使用的用户提交的值。

但对于您的直接问题:您在执行第一个 DELETE 后立即调用 $conn->close()。当您尝试执行第二个操作时，您的服务器连接已经关闭。在循环结束之前不要调用 $conn->close()。