Embed YouTube and Vimeo Videos Dynamically

Create helper functions to detect YouTube and Vimeo URLs and automatically generate embeddable video links for your theme.

//video function start 
function video_url($url){
    $type = videoType($url);
    if($type == "youtube"){

    $vidUrlID = parse_youtube($url);

    $videoId = isset(explode("v=",$url)[1]) ? explode("v=",$url)[1] : null;
    if (strpos($videoId, '&') !== false){
        $vidUrlID = explode("&",$videoId)[0];
    }
    $vidUrl = "https://www.youtube.com/embed/".$vidUrlID;
  } else if($type == "vimeo"){ 
        $vidUrlID = parse_vimeo($url);
        $vidUrl = "https://player.vimeo.com/video/".$vidUrlID;        
  } else { 
    $vidUrl = $url;   
  }
  return $vidUrl;
}
function videoType($url) {
    if (strpos($url, 'youtube') > 0) {
        return 'youtube';
    } elseif (strpos($url, 'vimeo') > 0) {
    return 'vimeo';
    }
}
function parse_youtube($link){

    $regexstr = '~
        # Match Youtube link and embed code
        (?:                             # Group to match embed codes
      (?:<iframe [^>]*src=")?     # If iframe match up to first quote of src
            |(?:                        # Group to match if older embed
                (?:<object .*>)?        # Match opening Object tag
                (?:<param .</param>)    # Match all param tags
                (?:<embed [^>]*src=")?  # Match embed tag to the first quote of src
            )?                          # End older embed code group
        )?                              # End embed code groups
    
        (?:                             # Group youtube url
      https?:\/\/                 # Either http or https
            (?:[\w]+\.)*                # Optional subdomains
            (?:                         # Group host alternatives.
        youtu\.be/              # Either youtu.be,
        | youtube\.com          # or youtube.com
        | youtube-nocookie\.com # or youtube-nocookie.com
            )                           # End Host Group
      (?:\S*[^\w\-\s])?           # Extra stuff up to VIDEO_ID
            ([\w\-]{11})                # $1: VIDEO_ID is numeric
            [^\s]*                      # Not a space
        )                               # End group
        "?                              # Match end quote if part of src
        (?:[^>]*>)?                     # Match any extra stuff up to close brace
        (?:                             # Group to match last embed code
            </iframe>                   # Match the end of the iframe
            |</embed></object>          # or Match the end of the older embed
        )?                              # End Group of last bit of embed code
        ~ix';
        preg_match($regexstr, $link, $matches);
        return $matches[1];
    
}
function parse_vimeo($link){
  $regexstr = '~
    # Match Vimeo link and embed code
    (?:<iframe [^>]*src=")?     # If iframe match up to first quote of src
    (?:                         # Group vimeo url
      https?:\/\/             # Either http or https
      (?:[\w]+\.)*            # Optional subdomains
      vimeo\.com              # Match vimeo.com
      (?:[\/\w]*\/videos?)?   # Optional video sub directory this handles groups links also
      \/                      # Slash before Id
      ([0-9]+)                # $1: VIDEO_ID is numeric
      [^\s]*                  # Not a space
    )                           # End group
    "?                          # Match end quote if part of src
    (?:[^>]*></iframe>)?        # Match the end of the iframe
    (?:<p>.*</p>)?              # Match any title information stuff
    ~ix';

  preg_match($regexstr, $link, $matches);

  return $matches[1];
}