Get variable from URL (posted in a form)

I know how to get a variable from a URL if it is the current URL. That's easy. Just use $_GET['value']..

..but what if the value is posted in a URL in a form. How can I get it then?

ie:

I have a form, and someone enters a YouTube URL:

https://www.youtube.com/watch?v=dMH0bHeiRNg

The method is POST!

Ok, so how can I get the value of "v"?

ie: I want something like:

$video_id = "???How do I get v???";

Then I can use $video_id for my purposes.

 

I suspect that my explanation above will confuse people (after reading it, lol).

So, I will explain another way:

if $_POST['video_url'] = https://www.youtube.com/watch?v=dMH0bHeiRNg

..then, how can I get the value of "v" out of it and turn it into $video_id?

So I have:

$video_id = "dMH0bHeiRNg";

???

 

A friend helped me in skype.

This is the answer:

preg_match('|v=([a-zA-Z0-9]{11})|', $_POST['video_url'], $matches);
$video_id =  $matches[1];

Code (markup):

 

MrLeN look function parse_url

 

I would use built in methods instead, this way no matter what Google decides the v variable becomes or changes, it will always work:

<?php
$url = 'https://www.youtube.com/watch?v=dMH0bHeiRNg';
$parts = parse_url($url);
if (!empty($parts['query'])) {
    // baz
    parse_str($parts['query'], $variables);
    echo $variables['v'];
}

PHP:

 

That is actually very helpful, and better than what I had already used. I appreciate your help mate.

 

thanks mate for sharing didn't know there was parse_url function too i also used to do same via preg match which wasn't accurate all the time