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@ 2013-05-23T17:14:27Z

<?php
$videoURLs = array(
	'http://www.youtube.com/embed/VIDEO_ID',
	'http://www.youtube.com/embed/VIDEO_ID/',
	'http://www.youtube.com/embed/VIDEO_ID/?lorem=ipsum',
	'http://youtu.be/VIDEO_ID',
	'http://youtu.be/VIDEO_ID/',
	'http://www.youtube.com/v/VIDEO_ID',
	'http://www.youtube.com/v/VIDEO_ID/',
	'http://www.youtube.com/watch?v=VIDEO_ID',
    'http://www.youtube.com/watch?feature=player_embedded&v=VIDEO_ID',
    'http://www.youtube.com/watch?v=VIDEO_ID&feature=player_embedded'
);

foreach ($videoURLs as $videoUrl) {
	$url       = parse_url($videoUrl);
	$pathParts = explode('/', rtrim($url['path'], '/'));
	$videoID   = end($pathParts);

	if (isset($url['query'])) {
		parse_str($url['query'], $query);
       # if (isset($query['v'])) {
		#	$videoID = $query['v'];
        #}
		#$videoID = (isset($query['v'])) ? $query['v'] : $videoID;
		$videoID = (isset($query['v'])) ?: $videoID;
	}

	var_dump($videoUrl, $videoID);
}
?>

Output for git.master, git.master_jit, rfc.property-hooks: string(37) "http://www.youtube.com/embed/VIDEO_ID" string(8) "VIDEO_ID" string(38) "http://www.youtube.com/embed/VIDEO_ID/" string(8) "VIDEO_ID" string(50) "http://www.youtube.com/embed/VIDEO_ID/?lorem=ipsum" string(8) "VIDEO_ID" string(24) "http://youtu.be/VIDEO_ID" string(8) "VIDEO_ID" string(25) "http://youtu.be/VIDEO_ID/" string(8) "VIDEO_ID" string(33) "http://www.youtube.com/v/VIDEO_ID" string(8) "VIDEO_ID" string(34) "http://www.youtube.com/v/VIDEO_ID/" string(8) "VIDEO_ID" string(39) "http://www.youtube.com/watch?v=VIDEO_ID" bool(true) string(63) "http://www.youtube.com/watch?feature=player_embedded&v=VIDEO_ID" bool(true) string(63) "http://www.youtube.com/watch?v=VIDEO_ID&feature=player_embedded" bool(true)

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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