如果包含某些不起作用的内容，请删除mysql行

Question

我正在使用以下脚本从留言簿中清除垃圾邮件链接，如果我将查询复制并通过phpmyadmin，它会正常工作，如果我在保存为php文件的浏览器中运行以下脚本，我会收到错误"无法执行查询："。我看了一遍，看不出静脉注射做错了什么，有人能看到明显的静脉注射遗漏了什么吗？。

    <?php
    // Checks to see if the key value is set
    if (isset($_GET['key'])) {
        $key = $_GET['key'];
    }
    // If the key value isnt set give it a value of nothing
    else
    {$key = '';}
    // Checks to see if the key value is valid to authenticate the user
    if ($key == 'keycode'){
    // If the key value is correct the user is granted access
    $con = mysql_connect("localhost","user","password");
    if (!$con)
      {
      die('Could not connect: ' . mysql_error());
      }
    // Select mysql db
    mysql_select_db("towerroa_TRA", $con);
    mysqli_query($con, "DELETE FROM `itsnb_phocaguestbook_items` WHERE `content` LIKE '%<a%'")or die ("Couldn't execute query: ".mysqli_error());
    echo 'Spam Purged !';
    }
    else {
    // Denies the user access if the key value isnt correct 
    echo '<h1>Access Denied !</h1>';}

Answer 1

问题是您混淆了mysql_和mysqli_。尝试修复以下问题；

mysqli_connect("localhost","user","password");
mysqli_select_db("towerroa_TRA", $con);
mysqli_query($con, "DELETE FROM `itsnb_phocaguestbook_items` WHERE `content` LIKE '%<a%'")or die ("Couldn't execute query: ".mysqli_error());

而不是；

mysql_connect("localhost","user","password");
mysql_select_db("towerroa_TRA", $con);
mysqli_query($con, "DELETE FROM `itsnb_phocaguestbook_items` WHERE `content` LIKE '%<a%'")or die ("Couldn't execute query: ".mysqli_error());

Answer 2

mysqli_select_db("towerroa_TRA", $con);

应该是

mysqli_select_db($con,"towerroa_TRA");

Answer 3

用mysqli_* 替换所有mysql_*函数

Answer 4

尝试这个

<?php
// Checks to see if the key value is set
if (isset($_GET['key'])) {
    $key = $_GET['key'];
}
// If the key value isnt set give it a value of nothing
else
{$key = '';}
// Checks to see if the key value is valid to authenticate the user
if ($key == 'keycode'){
// If the key value is correct the user is granted access
$con = mysql_connect("localhost","user","password");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }
// Select mysql db
mysql_select_db("towerroa_TRA", $con);
mysql_query($con, "DELETE FROM `itsnb_phocaguestbook_items` WHERE `content` LIKE '%<a%'")or die ("Couldn't execute query: ".mysql_error());
echo 'Spam Purged !';
}
else {
// Denies the user access if the key value isnt correct 
echo '<h1>Access Denied !</h1>';}