- preg_match: documentation ( source)
<?php
function parse_yturl($url)
{
$pattern = '#^(?:https?://)?(?:www|m\.)?(?:youtu\.be/|youtube\.com(?:/embed/|/v/|/watch\?v=|/watch\?.+&v=))([\w-]{11})(?:.+)?$#x';
preg_match($pattern, $url, $matches);
return isset($matches[1]) ? $matches[1] : false;
}
echo parse_yturl("https://www.youtube.com/watch?v=R4h7PgrCPWQ");