Checking YouTube URL

public function check_youtube_url($s, $c=FALSE)
{
	$page = 'youtube.com/watch?';
	$player = 'youtube.com/v/';
	$short = 'youtu.be/';
	
	$clean = str_replace( array( 'http://', 'www.' ), '', $s );
	
	if ( strpos( $clean, $page ) === 0 )
	{
		$vars_string = explode( '?', $s );
		$vars_string = explode( '&', $vars_string[ 1 ] );

		foreach ( $vars_string as $var )
		{
			$var = explode( '=', $var );

			$vars[ $var[ 0 ] ] = $var[ 1 ];
		}
		
		$id = $vars[ 'v' ];
	} 
	elseif ( strpos( $clean, $player ) === 0 )
	{
		$id = explode( '?', str_replace( $player, '', $clean ) );
		$id = $id[ 0 ];
	}
	elseif ( strpos( $clean, $short ) === 0 )
	{
		$id = explode( '?', str_replace( $short, '', $clean ) );
		$id = $id[ 0 ];
	}
	
	if ( $id )
	{
		$url = 'http://gdata.youtube.com/feeds/api/videos/' . $id . '?alt=json';
		
		$data = @file_get_contents( $url );
		
		if ( $data )
		{
			if ( $c )
			{
				return TRUE;
			}
			else
			{
				$json = json_decode( str_replace( '$t', 'text', $data ) );
				
				return array( $id, (string)$json->entry->author[ 0 ]->name->text );
			}
		}
	}
	
	return FALSE;
}