PHP Youtube视频ID正则表达式和PHP功能

Posted 2021-05-15

/**
 * Creates a YouTube thumbnail URL from a YouTube video URL
 */
function youtube_video_thumbnail($url,$index=0){
    if(preg_match('/^[^v]+v.(.{11}).*/',$url,$matches)){
        return 'http://img.youtube.com/vi/'.$matches[1].'/'.$index.'.jpg';
    }elseif(preg_match('/youtube.com\/user\/(.*)\/(.*)$/',$url,$matches)){
        return 'http://img.youtube.com/vi/'.$matches[2].'/'.$index.'.jpg';
    }else{
        return false;
    }
}