Php implementation of random display image method aggregation _ PHP Tutorial

Php implements a summary of random display image methods. Php implementation of random display image method summary this article shares a function of php implementation of random display of images, you can randomly display the images stored in the specified folder. A friend who is interested in php can achieve a summary of random display image methods

This article shares a php function for randomly displaying images. you can randomly display images stored in a specified folder. If you are interested, study it.

Php uses the rand () function to generate a random number. This function can generate a number within a specified range.

This code randomly selects an image through the random number generated

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Srand (microtime () * 1000000 ); $ Num = rand (1, 4 ); Switch ($ num) { Case 1: $ image_file = "/home/images/alfa.jpg "; Break; Case 2: $ image_file = "/home/images/ferrari.jpg "; Break; Case 3: $ image_file = "/home/images/jaruar.jpg "; Break; Case 4: $ image_file = "/home/images/porsche.jpg "; Break; } Echo "Random Image :"; ?>

Method 2:

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$ Handle = opendir ('./'); // Current Directory While (false! ==( $ File = readdir ($ handle) {// traverse the directory where the php Tutorial file is located List ($ filesname, $ kzm) = explode (".", $ file); // get the extension If ($ kzm = "gif" or $ kzm = "jpg") {// file filtering If (! Is_dir ('./'. $ file) {// folder filtering $ Array [] = $ file; // Save the qualified file name to an array } } } $ Suiji = array_rand ($ array); // use the array_rand function to randomly extract a unit from the array. ?> ">

Method 3:

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/*************************************** ******* * Filename: img. php * Author: freemouse * Usage: * * **************************************** *******/ If ($ _ GET ['Folder']) { $ Folder = $ _ GET ['Folder']; } Else { $ Folder = '/images /'; } // The location where the image file is stored $ Path = $ _ SERVER ['document _ root']. "/". $ folder; $ Files = array (); If ($ handle = opendir ("$ path ")){ While (false! ==( $ File = readdir ($ handle ))){ If ($ file! = "." & $ File! = ".."){ If (substr ($ file,-3) = 'GIF' | substr ($ file,-3) = 'jpg ') $ files [count ($ files)] = $ file; } } } Closedir ($ handle ); $ Random = rand (0, count ($ files)-1 ); If (substr ($ files [$ random],-3) = 'GIF') header ("Content-type: image/gif "); Elseif (substr ($ files [$ random],-3) = 'jpg ') header ("Content-type: image/jpeg "); Readfile ("$ path/$ files [$ random]"); ?>

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In this article, we will share a function for randomly displaying images implemented by php. you can randomly display images stored in a specified folder. Interested friends...