PHP Random read files from the folder method, _php tutorial

How PHP randomly reads files from a folder,

The example in this article describes how PHP randomly reads files from a folder. Share to everyone for your reference. The implementation method is as follows:

function Randomfile ($folder = ', $extensions = '. * ') {//fix path: $folder = Trim ($folder); $folder = ($folder = = ")?  './': $folder;  Check Folder:if (!is_dir ($folder)) {die (' Invalid folder given! ');}  Create files Array $files = array (); Open Directory if ($dir = @opendir ($folder)) {//Go trough all files:while ($file = Readdir ($dir)) {if (!PR Eg_match ('/^\.+$/', $file) and Preg_match ('/\. $extensions. ')              $/', $file)) {//Feed the array: $files [] = $file;    }}//Close directory Closedir ($DIR);  } else {die (' Could not open the folder '. $folder. ');  } if (count ($files) = = 0) {die (' No files where found:-(');  }//Seed random Function:mt_srand ((double) Microtime () *1000000);  Get an random index: $rand = Mt_rand (0, Count ($files)-1);  Check Again:if (!isset ($files [$rand])) {die (' Array index is not found! very strange! '); }//Return the random File:return $folder. $files [$raND];} Usage Demo://"jpg|png|gif" matches all files with these extensionsprint randomfile (' test_images/', ' jpg|png|gif ');// Returns test_07.gif//". *" matches all extensions (all files) print randomfile (' test_files/', '. * ');//returns FOOBAR_1. zip//"[0-9]+" matches all extensions the just//contain numbers (like BACKUP.1, BACKUP.2) print randomfile (' test_files/') , ' [0-9]+ ');//returns BACKUP.7

I hope this article is helpful to everyone's PHP programming.

http://www.bkjia.com/PHPjc/1011259.html www.bkjia.com true http://www.bkjia.com/PHPjc/1011259.html techarticle php Random read files from the folder method, this article describes the PHP from the folder random Read file method. Share to everyone for your reference. The concrete implementation method is as follows: Functio ...

