PHP Gets the code example for the first picture of each article in the site, _php tutorial

PHP Gets the code example for the first picture of each article in the Web site,

<?php $temp =mt_rand (1,4); $pattern = "/<[img| Img].*?src=[\ ' |\ "] (. *? (?: [\.gif|\.jpg|\.png])) [\ ' |\ '].*? [\/]?>/]; $content = $article->content; Article content Preg_match_all ($pattern, $content, $matchContent); if (Isset ($matchContent [1][0])) {   $temp = $matchContent [1][0];} else{   $temp = "images/random/$temp. jpg";//need to place 4 JPG files in the appropriate location with the name 1,2,3,4}  

The above code by default calls the first picture of the article, when the article does not have a picture, random call theme style/images/random/under the 1.jpg, 2.jpg, 3.jpg, 4.jpg pictures. If you don't want to call a random picture, you can modify it:

<?php $pattern = "/<[img| Img].*?src=[\ ' |\ "] (. *? (?: [\.gif|\.jpg|\.png])) [\ ' |\ '].*? [\/]?>/]; $content = $article->content; Article content Preg_match_all ($pattern, $content, $matchContent); if (Isset ($matchContent [1][0])) {   $temp = $matchContent [1][0];} else{   $temp = "./images/no-image.jpg";//place a JPG image named No-image in the appropriate location}  

Call the first picture of the article, if the article does not have a picture to call the default picture no-image.jpg

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