PHP, How can I retrieve a specific number?

Question

I need to retrieve itunes app id from the URL address.

https://itunes.apple.com/us/app/angry-birds-star-wars/id557137623?mt=8

I used strpos(), but this one didn't work.

How can I get numbers after id from this address?

$url = 'https://itunes.apple.com/us/app/angry-birds-star-wars/id557137623?mt=8';

$result = '557137623'

result will be like this one.

Answer 1

$url = 'https://itunes.apple.com/us/app/angry-birds-star-wars/id557137623?mt=8';
preg_match("~id(\d+)~", $url, $matches);
$result = $matches[1];
echo $result; //557137623

Answer 2

// Find where the / is and add 2 for the word "id"
$pos = strrpos($url, "/") + 2; // Note that it's "strrpos" not "strpos"

// Find the question mark at the end
$pos2 = strpos($url, "?");

$id = substr($url, $pos, $pos2 - $pos);

This is, of course, assuming your URL always has this form.