Get the video thumbnail for a YouTube video from a URL

youtubeThumb.php

<?php
/***********************************************/
/* Get a Youtube or Vimeo video's Thumbnail from a URL
/* http://darcyclarke.me/articles/development/get-image-for-youtube-or-vimeo-videos-from-url/
/* 
/* Copyright 2016, Darcy Clarke
/* Do what you want license
/***********************************************/
function video_image($url){
  $image_url = parse_url($url);
  if($image_url['host'] == 'www.youtube.com' || $image_url['host'] == 'youtube.com'){
    $array = explode('&', $image_url['query']);
    return 'http://img.youtube.com/vi/'.substr($array[0], 2).'/0.jpg';
  } else if($image_url['host'] == 'www.vimeo.com' || $image_url['host'] == 'vimeo.com'){
    $hash = unserialize(file_get_contents('http://vimeo.com/api/v2/video/'.substr($image_url['path'], 1).'.php'));
    return $hash[0]['thumbnail_small'];
  }
}
?>