Youtube url helper functions

helper.php

<?php

if (!function_exists('convert_youtube_embed')) {
    /**
     * Convert youtube link into embed link.
     *
     * @param string $url
     *
     * @return string
     */
    function convert_youtube_embed(string $url)
    {
        return preg_replace(
            "/\s*[a-zA-Z\/\/:\.]*youtu(be.com\/watch\?v=|.be\/)([a-zA-Z0-9\-_]+)([a-zA-Z0-9\/\*\-\_\?\&\;\%\=\.]*)/i",
            "https://www.youtube.com/embed/$2",
            $url
        );
    }
}
if (!function_exists('in_youtube')) {
    /**
     * Check if is youtube link.
     *
     * @param string $url
     *
     * @return bool
     */
    function in_youtube(string $url)
    {
        $yt_rx = '/^((?:https?:)?\/\/)?((?:www|m)\.)?((?:youtube\.com|youtu.be))(\/(?:[\w\-]+\?v=|embed\/|v\/)?)([\w\-]+)(\S+)?$/';
    
        //check if is youtube video link
        if(preg_match($yt_rx, $url, $yt_matches)) {
           return true;
        }
        return false;
    }
}
if (!function_exists('get_youtube_id')) {
    /**
     * Get youtube ID.
     *
     * @param string $url
     *
     * @return string
     */
    function get_youtube_id(string $url)
    {
        $yt_rx = '/^((?:https?:)?\/\/)?((?:www|m)\.)?((?:youtube\.com|youtu.be))(\/(?:[\w\-]+\?v=|embed\/|v\/)?)([\w\-]+)(\S+)?$/';
    
        //check if is youtube video link and return the ID
        if(preg_match($yt_rx, $url, $yt_matches)) {
            $videoId = $yt_matches[5];
            return $videoId;
        }
        return "Youtube Id not found";
    }
}
if (!function_exists('get_youtube_thumbnail')) {
    /**
     * Get youtube thumbnail.
     *
     * @param string $url
     *
     * @return array
     */
    function get_youtube_thumbnail(string $url)
    {
        $youtubeId = get_youtube_id($url);
        
        //'mqdefault.jpg',
        return "https://i.ytimg.com/vi/{$youtubeId}/mqdefault.jpg";
    }
}