602      * @param string $src media ID
611         $src,  argument
622         $this->_firstimage($src);
623         $this->_recordMediaUsage($src);
629      * @param string $src full media URL
638         $src,  argument
649         $this->_firstimage($src);
732      * @param string $src image URL or ID
734     protected function _firstimage($src)  argument
742         [$src] = explode('#', $src, 2);
743         if (!media_isexternal($src)) {
744             $src = (new MediaResolver($ID))->resolveId($src);
746         if (preg_match('/.(jpe?g|gif|png|webp|svg)$/i', $src)) {
747             $this->firstimage = $src;
754      * @param string $src media ID
756     protected function _recordMediaUsage($src)  argument
760         [$src] = explode('#', $src, 2);
761         if (media_isexternal($src)) {
764         $src = (new MediaResolver($ID))->resolveId($src);
765         $file = mediaFN($src);
766         $this->meta['relation']['media'][$src] = file_exists($file);