代码如下 使用方法直接加入到主题函数【Functions.php】即可 add_theme_support( 'post-thumbnails' ); function catch_that_image() { global $post, $posts; $first_img = ''; ob_start(); ob_end_clean(); $output = preg_match_all('/<img.+src=[\'"]([^\'"]+)[\' […]