示例帖子应该是内容。

Samplepost{IFTTImageFetch=“”https://drscdn.500px.org/photo/132307433/m%3D900/4c2b5e1f7f8c4d4a11a56f8f3cfdc565“}一些东西..asd asd asd

  function getImageUrlOutOfContent($content)
    {
        preg_match_all(\'/\\\\{IFTTTImageFetch="([^"]+)"\\\\}/i\', $content, $matches);
        $url = $matches[1][0];
        importRemoteMedia($url, $post->ID);     
        $content = str_replace($url, "", $content);
        return $content;
    }
    add_filter(\'content_save_pre\', \'getImageUrlOutOfContent\', 10, 1);