Description:
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Will, while i was coding a simple PHP code for practice I run into this bug witch i found out that it start making many sessions by it self and start looping until the Apache process is full(The code have no loops).
I tested it on windows, *nix in v 5.4.* I believe its the same on other versions.

Test script:
---------------
<?php

function p404curl($url){
	$ch = curl_init();      
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
        curl_setopt($ch, CURLOPT_USERAGENT, "Chrome/36.0.1985.125");
        return curl_exec($ch);
}

if (strtolower(substr(PHP_OS,0,3))=="win")
    $sys='win';
 else
    $sys='unix';

$me = basename(__FILE__ );
$uul = $_SERVER['PHP_SELF'];
$rew = md5(time());
$uul = str_replace($_SERVER['REQUEST_URI'],$rew,$uul);
$uul= 'http://'.$_SERVER['HTTP_HOST'].$uul;
$uul1 = $_SERVER['REQUEST_URI'];
$uul = str_replace($rew,$_SERVER['REQUEST_URI'],$uul);

$d404 = 'e';
if ($sys == 'win'){
	if (!isset($_SESSION['hidden']) || !file_exists('C:\\Users\\Default\\AppData\\Local\\Temp\\'.md5($uul1))){
		$p404 = p404curl($uul) or $d404;
		file_put_contents("C:\\Users\\Default\\AppData\\Local\\Temp\\".md5($uul1),$p404);
		$_SESSION['hidden'] = md5($uul1);
	}else{
		$p404 = file_get_contents('C:\\Users\\Default\\AppData\\Local\\Temp\\'.md5($uul1));
	}
}else{
	if (!isset($_SESSION['hidden']) || !file_exists('/tmp/'.md5($uul1))){
		$p404 = p404curl($uul) or $d404;
		file_put_contents('/tmp/'.md5($uul1),$p404);
		$_SESSION['hidden'] = md5($uul1);
		
	}else{
		$p404 = file_get_contents('/tmp/'.md5($uul1));
		
	}
}

echo $p404;
	die();

Expected result:
----------------
nothing the web page will keep on loading and the server will be down, because apache will be full.