WordPress Plugin Example

shortcode.php

<?php

namespace Aotoki;

class YoutubeShortcode {

  static private $_instance;

  private function __construct()
  {

  }

  static public function get_instance()
  {
    if(self::$_instance == null) {
      self::$_instance = new YoutubeShortcode();
    }

    return self::$_instance;
  }

  public function init()
  {
    // Register Shortcode
    add_shortcode('youtube', array(&$this, 'handle_shortcode'));
    // Add Script into WP
    add_action('wp_enqueue_scripts', array(&$this, 'handle_enqueue_script'));
  }

  public function handle_enqueue_script()
  {
    // Register JWPlayer Script
    wp_enqueue_script('jwplayer', plugin_dir_url(YS_BASEDIR) . "vendor/jwplayer/jwplayer.js", array(), "6.4");
  }

  public function handle_shortcode($atts) {
    extract(
      shortcode_atts(
        array(
          'multi' => false,
          'url' => null
        ), $atts
      )
    );

    if(empty($url)) {
      // Didn't get url, then return noting
      return;
    }

    $is_multi = (bool) $multi;

    if($is_multi) {
      // if have multi url, then split it
      $url = explode(',', $url);
    }

    return $this->script_generator($url);

  }

  public function script_generator($urls) {
    // Generate JWPlayer Script
    $scripts = "";


    $identify = "ys-" . md5(time() + rand()); // Make ID unique

    $scripts .= '<div id="'.$identify.'">Loading video...</div>';
    $scripts .= '<script>';
    if(is_array($urls)) {
      $playlist = array();
      foreach($urls as $url) {
        array_push($playlist, array('file' => $url));
      }
      $playlist = json_encode($playlist);
      $scripts .= 'jwplayer("'.$identify.'").setup({playlist: '.$playlist.'});';
    } else {
      $scripts .= 'jwplayer("'.$identify.'").setup({file: "'.$urls.'"});';
    }
    $scripts .= '</script>';

    return $scripts;
  }
}