删除查询正在执行，但记录已删除且 table 为空

Question

每次 "Removed!!!" 都是结果.... $na 在 au.php 中声明...也许 DELETE 查询可能有问题..

<?php
date_default_timezone_set('Asia/KolKata');
$xyz = date(DATE_RFC2822);
include "../au.php";

$conn = mysql_connect('localhost', 'local', 'local');
mysql_select_db('sol_index', $conn);
$sid = $_GET['sid'];
$qqq = "SELECT * FROM $sid WHERE (one = '$na' AND three = 'liked')";

if (mysql_query($qqq)){
    mysql_query("DELETE FROM $sid WHERE (one='$na' AND three='liked')");
    echo "Removed!!!";
} else {
    mysql_query("INSERT INTO $sid (one, three) VALUES ('$na', 'liked')");
    echo "Liked!!!";
}

?>

感谢您的配合和帮助！！

Answer 1

Each time "Removed!!!" is the result

没错。

$qqq = "SELECT * FROM $sid WHERE (one = '$na' AND three = 'liked')";
if (mysql_query($qqq)){
    mysql_query("DELETE FROM $sid WHERE (one='$na' AND three='liked')");
    echo "Removed!!!";
}

那个if是不正确的，只要查询有效，它总是return真，即使没有数据。您需要运行检查记录数量或记录本身，而不仅仅是执行。例如，您必须从该结果中获取数据并运行您对此进行检查。

How can I prevent SQL injection in PHP?

删除查询正在执行，但记录已删除且 table 为空

Delete Query is executing however record is deleted and table is empty

php

mysql

delete-row