Recursive run PHP scripts?

In this issue also raised the question of run a certain task in php in a separate process:

if by "processing" does not mean the withdrawal of enough something like this:
//reference to a.php?id=0
//processing of images with id=0
$id=$_GET['id'];
$id++;
header("Location: site.ru/a.php?id=$id");

And not if the CRON for this purpose?
\r
If you know the approximate time of processing one image, it is better to configure the script the cron every N minutes. He php script gets the next image and starts processing, and then marks this task as done and completed.

Here's another option, which is probably not in all cases, but still love it...
\r
If applicable, is the html page where you ajax'ω, a request is sent to a php script on the server. After returning a successful response we have a break and send the request again. And so on.
\r
I did compile a Sitemap for your site.
\r
Requirements: download original html page in the browser
Limitation: maximum execution execute a php script (in the server settings).

What are you doing with the images? I think you can do without the perverted.
But to call php from console option in the beginning of the script to write so
\r

if ($argc > 0) { for ($i=1; $i < $argc; $i++) { parse_str($argv[$i], $tmp); $_REQUEST = array_merge($_REQUEST, $tmp); } } 

and cause so
exec("/usr/bin/php /var/www/c.php id=1 > /dev/null &");

As Varian at the end of script execution with a.php?id=1 send get/post http request to the script with a.php?id=2.

Under Apache you can use virtualthat performs epicheskie subqueries, but there is a tough tie from the Apache, for different servers, you can emulate this functionality by making an external request (via curl, socket's, Yes, at least file_get_contents), well, that one script is not waiting for the other to complete first after the hard interrupt request, and the second set ignore_user_abort
And if not a secret, why are you such a crafty delights?