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<?php function parse_yturl($url) { $pattern = '#^(?:https?://)?(?:www\.)?(?:youtu\.be/|youtube\.com(?:/embed/|/v/|/watch\?v=|/watch\?.+&v=))([\w-]{11})(?:.+)?$#x'; preg_match($pattern, $url, $matches); return isset($matches[1]) ? $matches[1] : false; } var_dump(parse_yturl("http://www.youtube.com/embed/a6SX3Gxbawc?wmode=transparent&start="));
Output for git.master, git.master_jit, rfc.property-hooks
string(11) "a6SX3Gxbawc"

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