rex_media::get PHP Method

    public static function get($name)
    {
        if (!$name) {
            return null;
        }
        return self::getInstance($name, function ($name) {
            $media_path = rex_path::addonCache('mediapool', $name . '.media');
            if (!file_exists($media_path)) {
                rex_media_cache::generate($name);
            }
            if (file_exists($media_path)) {
                $cache = rex_file::getCache($media_path);
                $aliasMap = ['filename' => 'name', 'filetype' => 'type', 'filesize' => 'size'];
                $media = new self();
                foreach ($cache as $key => $value) {
                    if (array_key_exists($key, $aliasMap)) {
                        $var_name = $aliasMap[$key];
                    } else {
                        $var_name = $key;
                    }
                    $media->{$var_name} = $value;
                }
                $media->category = null;
                return $media;
            }
            return null;
        });
    }

 protected function getOutput()
 {
     $id = $this->getArg('id', 0, true);
     if (!in_array($this->getContext(), ['module', 'action']) || !is_numeric($id) || $id < 1 || $id > 10) {
         return false;
     }
     $value = $this->getContextData()->getValue('media' . $id);
     if ($this->hasArg('isset') && $this->getArg('isset')) {
         return $value ? 'true' : 'false';
     }
     if ($this->hasArg('widget') && $this->getArg('widget')) {
         if (!$this->environmentIs(self::ENV_INPUT)) {
             return false;
         }
         $args = [];
         foreach (['category', 'preview', 'types'] as $key) {
             if ($this->hasArg($key)) {
                 $args[$key] = $this->getArg($key);
             }
         }
         $value = self::getWidget($id, 'REX_INPUT_MEDIA[' . $id . ']', $value, $args);
     } else {
         if ($this->hasArg('output') && $this->getArg('output') == 'mimetype') {
             $media = rex_media::get($value);
             if ($media) {
                 $value = $media->getType();
             }
         }
     }
     return self::quote($value);
 }