WordPress non-regular get the first image of the article

Circulated onlineWordPressThe method of obtaining the first picture of the article as a thumbnail is achieved by using regular matching crawling,code show as below: function catch_that_image() { global $post, $posts; $first_img = ”; ob_start(); ob_end_clean(); $output = preg_match_all(‘/<img.+src=[‘”]([^'”]+)[‘”].*>/i’, $post->post_content, $matches); $first_img = $matches[1][0]; if(empty($first_img)){ $first_img = ‘/images/default.jpg’; } return $first_img; } Some people say that […]