php简单实现sql防注入的方法,phpsql防注入
php简单实现sql防注入的方法,phpsql防注入
本文实例讲述了php简单实现sql防注入的方法。分享给大家供大家参考,具体如下:
这里没有太多的过滤,主要是针对php和mysql的组合。
一般性的防注入,只要使用php的 addslashes 函数就可以了。
以下是一段copy来的代码:
PHP代码:
$_POST = sql_injection($_POST); $_GET = sql_injection($_GET); function sql_injection($content) { if (!get_magic_quotes_gpc()) { if (is_array($content)) { foreach ($content as $key=>$value) { $content[$key] = addslashes($value); } } else { addslashes($content); } } return $content; }
做系统的话,可以用下面的代码,也是copy来的。
PHP代码:
function inject_check($sql_str) { return eregi('select|insert|update|delete|\'|\/\*|\*|\.\.\/|\.\/|union|into|load_file|outfile', $sql_str); // 进行过滤 } function verify_id($id=null) { if (!$id) { exit('没有提交参数!'); } // 是否为空判断 elseif (inject_check($id)) { exit('提交的参数非法!'); } // 注射判断 elseif (!is_numeric($id)) { exit('提交的参数非法!'); } // 数字判断 $id = intval($id); // 整型化 return $id; } function str_check( $str ) { if (!get_magic_quotes_gpc()) { // 判断magic_quotes_gpc是否打开 $str = addslashes($str); // 进行过滤 } $str = str_replace("_", "\_", $str); // 把 '_'过滤掉 $str = str_replace("%", "\%", $str); // 把 '%'过滤掉 return $str; } function post_check($post) { if (!get_magic_quotes_gpc()) { // 判断magic_quotes_gpc是否为打开 $post = addslashes($post); // 进行magic_quotes_gpc没有打开的情况对提交数据的过滤 } $post = str_replace("_", "\_", $post); // 把 '_'过滤掉 $post = str_replace("%", "\%", $post); // 把 '%'过滤掉 $post = nl2br($post); // 回车转换 $post = htmlspecialchars($post); // html标记转换 return $post; }
更多关于PHP相关内容感兴趣的读者可查看本站专题:《php程序设计安全教程》、《php安全过滤技巧总结》、《PHP运算与运算符用法总结》、《PHP网络编程技巧总结》、《PHP基本语法入门教程》、《php操作office文档技巧总结(包括word,excel,access,ppt)》、《php面向对象程序设计入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》
希望本文所述对大家PHP程序设计有所帮助。

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