通用的PHP防注入漏洞攻击的过滤函数代码

转自:http://www.q3060.com/list3/list117/17015.html

//PHP整站防注入程序,需要在公共文件中require_once本文件 
//判断magic_quotes_gpc状态 
if (@get_magic_quotes_gpc ()) { 
$_GET = sec ( $_GET ); 
$_POST = sec ( $_POST ); 
$_COOKIE = sec ( $_COOKIE ); 
$_FILES = sec ( $_FILES ); 

$_SERVER = sec ( $_SERVER ); 
function sec(&$array) { 
//如果是数组,遍历数组,递归调用 
if (is_array ( $array )) { 
foreach ( $array as $k => $v ) { 
$array [$k] = sec ( $v ); 

} else if (is_string ( $array )) { 
//使用addslashes函数来处理 
$array = addslashes ( $array ); 
} else if (is_numeric ( $array )) { 
$array = intval ( $array ); 

return $array; 

//整型过滤函数 
function num_check($id) { 
if (! $id) { 
die ( '参数不能为空!' ); 
} //是否为空的判断 
else if (inject_check ( $id )) { 
die ( '非法参数' ); 
} //注入判断 
else if (! is_numetic ( $id )) { 
die ( '非法参数' ); 

//数字判断 
$id = intval ( $id ); 
//整型化 
return $id; 

//字符过滤函数 
function str_check($str) { 
if (inject_check ( $str )) { 
die ( '非法参数' ); 

//注入判断 
$str = htmlspecialchars ( $str ); 
//转换html 
return $str; 

function search_check($str) { 
$str = str_replace ( "_", "\_", $str ); 
//把"_"过滤掉 
$str = str_replace ( "%", "\%", $str ); 
//把"%"过滤掉 
$str = htmlspecialchars ( $str ); 
//转换html 
return $str; 

//表单过滤函数 
function post_check($str, $min, $max) { 
if (isset ( $min ) && strlen ( $str ) < $min) { 
die ( '最少$min字节' ); 
} else if (isset ( $max ) && strlen ( $str ) > $max) { 
die ( '最多$max字节' ); 

return stripslashes_array ( $str ); 

//防注入函数 
function inject_check($sql_str) { 
return eregi ( 'select|inert|update|delete|\'|\/\*|\*|\.\.\/|\.\/|UNION|into|load_file|outfile', $sql_str ); 
// www.q3060.com 进行过滤,防注入 

function stripslashes_array(&$array) { 
if (is_array ( $array )) { 
foreach ( $array as $k => $v ) { 
$array [$k] = stripslashes_array ( $v ); 

} else if (is_string ( $array )) { 
$array = stripslashes ( $array ); 

return $array; 

?>

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