動画ダウンローダ - youtube-dlで動画情報を取得

youtube_dl_get_info.php

<?php

/*
 * youtube-dlコマンド　動画情報取得
 */

class youtube_dl_get_info {
    private $info;
    
    /*
     * プロパティの動画情報取得
     */
    public function get_info(){
        return $this->info;
    }
    
    /*
     * 動画情報取得
     * @param string url 動画URL
     */
    
    public function command($url){
        $args = escapeshellarg($url);
        
        $cmd     = '/usr/bin/youtube-dl -j --cache-dir /tmp ' . $args . ' 2>&1';
        exec($cmd, $msg, $res);
        
        if ($res==0){
            //---------------------
            // 取得成功
            //---------------------
            $tmp = json_decode($msg[0], true);
            
            $this->info = array(
                'thumbnail' => $tmp['thumbnail'],
                'title'    => $tmp['fulltitle'],
                'error_code' => 0,
                'error_info' => '',
                'error_msg'  => ''
            );
        }else{
            //---------------------
            //取得失敗
            //---------------------
            $ERROR_PATTERN = "{^ERROR: Unable to download webpage: HTTP Error (\d+):(.*?);}";
            
            $this->info = array(
                'thumbnail'   => '',
                'title'      => '',
            );
            
            if (preg_match($ERROR_PATTERN, $msg[0], $code)){
                $this->info['error_code'] = $code[1];
                $this->info['error_info'] = $code[2];
            }

            $this->info['error_msg']  = $msg[0];
        }
        
        return $this->info;
    }
}