How to express random background image in php

We can put the background image into a folder, use the glob() function in PHP to return the folder where the image is located, and then use the rand() function to randomly call the folder in the folder. Picture, just set the called picture as the background picture.

Recommended: php server

Randomly generate background image PHP code:

<?php
/** 
* PHP随机图显示 
*/ 
header(&#39;Content-Type: text/html; charset=UTF-8&#39;); 
$img_array = glob("./img/*.jpg",GLOB_BRACE); 
$img = array_rand($img_array); 
header("location:.$img_array[$img]"); 
?>

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