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<?php $str = 'https://www.youtube.com/watch?v=UiyDmqO59QE'; if (preg_match('/(youtu\.be\/|youtube\.com\/(watch\?(.*&)?v=|(embed|v)\/))([^\?&"\'>]+)/', $str, $matches)) { var_dump( trim($matches[5]) ); }
Output for git.master, git.master_jit, rfc.property-hooks
string(11) "UiyDmqO59QE"

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