Calling the first picture in the article as the list pageThumbnail image is a very popular practice, and the same is true by default for general themes in WordPress, so let’s do it together next Take a look at the code example of PHP getting the first picture of each article on the website
<?php $temp=mt_rand(1,4); $pattern="/<[img|IMG].*?src=[\'|\"](.*?(?:[\.gif|\.jpg|\.png]))[\'|\"].*?[\/]?>/"; $content = $article->Content; //文章内容 preg_match_all($pattern,$content,$matchContent); if(isset($matchContent[1][0])){ $temp=$matchContent[1][0]; }else{ $temp="images/random/$temp.jpg";//需要在相应位置放置4张jpg的文件,名称为1,2,3,4 } ?>
The above code calls the first picture of the article by default. When the article has no picture, it randomly calls the theme style/ 1.jpg, 2.jpg, 3.jpg, 4.jpg pictures under images/random/. If you don’t want to call a random picture, you can modify it:
<?php $pattern="/<[img|IMG].*?src=[\'|\"](.*?(?:[\.gif|\.jpg|\.png]))[\'|\"].*?[\/]?>/"; $content = $article->Content; //文章内容 preg_match_all($pattern,$content,$matchContent); if(isset($matchContent[1][0])){ $temp=$matchContent[1][0]; }else{ $temp="./images/no-image.jpg";//在相应位置放置一张命名为no-image的jpg图片 } ?>
Call the first picture of the article. If the article has no picture, call the default picture no-image.jpg
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