360提供的php防注入程式碼

//Code By Safe3
function customError($errno, $errstr, $errfile, $errline)
{
  echo "Error number: [$errno],error on line $errline in $errfile" ;
  die();
}
set_error_handler("customError",E_ERROR);
$getfilter="'|(and|or)\b. ?(>|<|=|in|like)|\/\*. ?\*\/|<\s*script\b|\bEXEC\b|UNION. ?Select|Update. ?SET|Insert\s INTO. ?VALUES|(Select|Delete). ?FROM|(Create|Alter|Drop|TRUNCATE)\s (TABLE|DATABASE)" ;
$postfilter="\b(and|or)\b.{1,6}?(=|>|<|\bin\b|\blike\b)|\/\*. ?\*\/|<\s*script\b|\bEXEC\b|UNION. ?Select|Update. ?SET|Insert\s INTO. ?VALUES|(Select|Delete). ?FROM|(Create|Alter|Drop|TRUNCATE)\s (TABLE|DATABASE)" ;
$cookiefilter="\b(and|or)\b.{1,6}?(=|>|<|\bin\b|\blike\b)|\/\*. ?\*\/|<\s*script\b|\bEXEC\b|UNION. ?Select|Update. ?SET|Insert\s INTO. ?VALUES|(Select|Delete). ?FROM|(Create|Alter|Drop|TRUNCATE)\s (TABLE|DATABASE)" ;
function StopAttack($StrFiltKey,$StrFiltValue,$ArrFiltReq){

if(is_array($StrFiltValue))
{
  $StrFiltValue=implode($StrFiltValue);
}
if (preg_match("/".$ArrFiltReq."/is",$StrFiltValue)==1){
    //slog("操作IP: ".$_SERVER["REMOTE_ADDR"]."操作时间: ".strftime("%Y-%m-%d %H:%M:%S")."操作页面:".$_SERVER["PHP_SELF"]."提交方式: ".$_SERVER["REQUEST_METHOD"]."提交参数: ".$StrFiltKey."提交数据: ".$StrFiltValue);
    print "360websec notice:Illegal operation!" ;
    exit();
}
}
//$ArrPGC=array_merge($_GET,$_POST,$_COOKIE);
foreach($_GET as $key=>$value){
  StopAttack($key,$value,$getfilter);
}
foreach($_POST as $key=>$value){
  StopAttack($key,$value,$postfilter);
}
foreach($_COOKIE as $key=>$value){
  StopAttack($key,$value,$cookiefilter);
}
/*
if (file_exists('update360.php')) {
  echo "请重命名文件update360.php，防止黑客利用";
  die();
}
*/
function slog($logs)
{
  $toppath=$_SERVER["DOCUMENT_ROOT"]."/log.htm";
  $Ts=fopen($toppath,"a ");
  fputs($Ts,$logs."rn");
  fclose($Ts);
}

php