PHP简易的防注入代码

<?php

//要过滤的非法字符

$ArrFilter=array(“‘”,”;”,”union”);  //敏感字符和字符串，可自行定义

//出错后要跳转的url,不填则默认前一页

$StrGoUrl=”";

//是否存在数组中的值

function DangerStringExist($StrFilter,$ArrFilter){

foreach ($ArrFilter as $key=>$value){

if (eregi($value,$StrFilter)){

return true;

}

}

return false;

}

//合并$_POST   $_GET 和 $_COOKIE

if(function_exists(array_merge)){

$ArrGPC=array_merge($_POST,$_GET,$_COOKIE);

}else{

foreach($_POST as $key=>$value){

$ArrGPC[]=$value;

}

foreach($_GET as $key=>$value){

$ArrGPC[]=$value;

}

foreach($_COOKIE as $key=>$value){

$ArrGPC[]=$value;

}

}

foreach($ArrGPC as $key=>$value){

if(DangerStringExist($value,$ArrFilter)){

echo “<script>alert(‘MyCMS提示，您的输入有非法字符!’);</script>”;

if (empty($StrGoUrl)){

echo “<script>history.go(-1);</script>”;

}else{

echo “<script>window.location=”.$StrGoUrl.”</script>”;

}

exit;

}

}

?>

<?php //要过滤的非法字符

$ArrFilter=array(“‘”,”;”,”union”);  //敏感字符和字符串，可自行定义

//出错后要跳转的url,不填则默认前一页

$StrGoUrl=”";

//是否存在数组中的值

function DangerStringExist($StrFilter,$ArrFilter){

foreach ($ArrFilter as $key=>$value){

if (eregi($value,$StrFilter)){

return true;

}

}

return false;

}

//合并$_POST ， $_GET 和 $_COOKIE

if(function_exists(array_merge)){

$ArrGPC=array_merge($_POST,$_GET,$_COOKIE);}else{

foreach($_POST as $key=>$value){

$ArrGPC[]=$value;

}

foreach($_GET as $key=>$value){

$ArrGPC[]=$value;           }

foreach($_COOKIE as $key=>$value){

$ArrGPC[]=$value;           }

}

foreach($ArrGPC as $key=>$value){

if(DangerStringExist($value,$ArrFilter)){

echo “<script>alert(‘MyCMS提示，您的输入有非法字符!’);</script>”;

if (empty($StrGoUrl)){

echo “<script>history.go(-1);</script>”;

}else{

echo “<script>window.location=”.$StrGoUrl.”</script>”;     }

exit;

}

}

?>