pSQL - Prevent SQL Injection

Kode 

<?php
/* This script is created by Jonas Jensen (iJonas@live.dk) all people are free to use this scripts as long this text is keeped!  I dont have the responsibility for any damage this script must have.
Feel free to contact me @ iJonas@live.dk */
$sendmail = "1"; // Send a mail if someone does the injection trick? 1=Y 0=N
$mail = "iJonas@live.dk";
$warningmessage = "Din aktivitet er blevet registret!";
function v2($content,$sendmail,$warningmessage,$mail) {
	if (preg_match("/(.)=(.)--/", $content)) {
		if($sendmail == "0") { echo "<font color=\"red\">$warningmessage<br /><b>IP: $_SERVER[REMOTE_ADDR]</b></font>"; exit(); }else{
		$time = date("H:i:s");
		$date = date("d/m/Y");
		mail("$mail","SQL INJECTION DETECTED AT $_SERVER[SCRIPT_FILENAME]","This message is automatically generated by the SQL INJECTION DETECTOR running @ $_SERVER[SERVER_ADDR] \n IP Comitted the crime: $_SERVER[REMOTE_ADDR] \n Comitted at $_SERVER[REQUEST_URI] \n Time/Date $time (HH/MM/SS) $date (DD/MM/YYYY)","from:SQJL@INJECTION.COM");
		} // NO PROBLEMS DETECTED WE'RE ALL HAPPY =D 
	}
}
if(isset($_POST)) {
	foreach($_POST as $x => $content) {
		v2($content,$sendmail,$warningmessage,$mail);
		$_POST[$x] = stripslashes($content);
		$_POST[$x] = mysql_real_escape_string($content);
	}
}

if(isset($_GET)) {
	foreach($_GET as $x => $content) {
		v2($content,$sendmail,$warningmessage,$mail);
		$_GET[$x] = stripslashes($content);
		$_GET[$x] = mysql_real_escape_string($content);
	}
}
?>