Question

我想让这个页面安全，但我不知道我应该从哪里开始。因为我昨天注射了我treid mysql转义字符串，但我没有多少帮助。我对PDO一无所知，你能挂我吗？这是代码。

<?php
//category.php

require_once('startsession.php');
require_once('php/mysql_prisijungimas.php');
include 'connect.php';

//first select the category based on $_GET['cat_id']
$sql = "SELECT
            cat_id,
            cat_name,
            cat_description
        FROM
            categories
        WHERE
            cat_id = " . mysql_real_escape_string($dbc, trim($_GET['id']));

$result = mysql_query($sql);

if(!$result)
{
    echo 'The category could not be displayed, please try again later.' . mysql_error();
}
else
{
    if(mysql_num_rows($result) == 0)
    {
        echo 'This category does not exist.';
    }
    else
    {
        //display category data
        while($row = mysql_fetch_assoc($result))
        {
            echo '<h2>Topics in &prime;' . $row['cat_name'] . '&prime; category</h2><br />';
        }

        //do a query for the topics
        $sql = "SELECT  
                    topic_id,
                    topic_subject,
                    topic_date,
                    topic_cat
                FROM
                    topics
                WHERE
                    topic_cat = " . mysql_real_escape_string($dbc, trim($_GET['id']));

        $result = mysql_query($sql);

        if(!$result)
        {
            echo 'The topics could not be displayed, please try again later.';
        }
        else
        {
            if(mysql_num_rows($result) == 0)
            {
                echo 'There are no topics in this category yet.';
            }
            else
            {
                //prepare the table
                echo '<table border="1">
                      <tr>
                        <th>Topic</th>
                        <th>Created at</th>
                      </tr>';   

                while($row = mysql_fetch_assoc($result))
                {               
                    echo '<tr>';
                        echo '<td class="leftpart">';
                            echo '<h3><a href="topic.php?id=' . $row['topic_id'] . '">' . $row['topic_subject'] . '</a><br /><h3>';
                        echo '</td>';
                        echo '<td class="rightpart">';
                            echo date('d-m-Y', strtotime($row['topic_date']));
                        echo '</td>';
                    echo '</tr>';
                }
            }
        }
    }
}
?>

Answer 1

在你的情况下，用引号括起mysql_real_escape_string：

SELECT * FROM table WHERE ID = '".mysql_real_escape_String($_POST['ID'])."'

请注意额外的单引号。这将使其更安全，但最好使用准备好的语句。除了优先使用mysql_query上的预准备语句之外，从php 5.5.0开始，函数mysql_query（）将被弃用。

stackoverflow还有另一个主题，它提出了“如何防止PHP Pdo中的SQL注入”的问题。您可能会找到一些示例和额外信息： How can I prevent SQL injection in PHP?

参数化语句和安全性

1 个答案: