PHP - Detect if a link text contains Facebook embeddable content using regular Expressions

facebook-detect-embed-link-regex.php

<?php
// Detect if the content contains any Facebook links that can be embedded based on this doc 
// https://developers.facebook.com/docs/plugins/oembed-endpoints/
$content = 'https://www.facebook.com/facebook/videos/10153231379946729/';
preg_match_all( '/http(s):\/\/(www.)facebook.com\/((?<=\/).+(?<=\/)posts|(?<=\/).+(?<=\/)activity|photo(s|\.php)|permalink\.php|media|questions|notes|(?<=\/).+(?<=\/)videos|video\.php)/', $content, $matches );