php custom function to get image path from content

Call up a large amount of data from the database to obtain the path of the first picture in the content. This article provides you with a simple custom function. Friends in need can refer to it.

The code is as follows:

<?php
/**
 * 内容中取图片路径
 * by http://bbs.it-home.org
*/
function s_img($str){
    preg_match_all("/<img .*\ alt="php custom function to get image path from content" >/isU",$str,$ereg);//把图片的<img整个都获取出来了
    $img=$ereg[0][0];//图片
    $p="#src=('|\")(.*)('|\")#isU";
    preg_match_all ($p, $img, $img1);
    $img_path =$img1[2][0];//获取第一张图片路径
    return $img_path;
}
?>