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Random Images Script

/ Published in: PHP
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Put your images in a folder called 'random' in your ROOT directory.

Please this script at the top of your page:

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  1. <?php function RandomFile($folder='', $extensions='.*'){
  2.    // fix path:
  3.     $folder = trim($folder);
  4.     $folder = ($folder == '') ? './' : $folder;
  5.  
  6.     // check folder:
  7.     if (!is_dir($folder)){ die('invalid folder given!'); }
  8.  
  9.     // create files array
  10.     $files = array();
  11.  
  12.     // open directory
  13.     if ($dir = @opendir($folder)){
  14.  
  15.         // go trough all files:
  16.         while($file = readdir($dir)){
  17.  
  18.             if (!preg_match('/^\.+$/', $file) and 
  19.                 preg_match('/\.('.$extensions.')$/', $file)){
  20.  
  21.                 // feed the array:
  22.                 $files[] = $file;                
  23.             }            
  24.         }        
  25.         // close directory
  26.         closedir($dir);    
  27.     }
  28.     else {
  29.         die('Could not open the folder "'.$folder.'"');
  30.     }
  31.  
  32.     if (count($files) == 0){
  33.         die('No files where found :-(');
  34.     }
  35.  
  36.     // seed random function:
  37.     mt_srand((double)microtime()*1000000);
  38.  
  39.     // get an random index:
  40.     $rand = mt_rand(0, count($files)-1);
  41.  
  42.     // check again:
  43.     if (!isset($files[$rand])){
  44.         die('Array index was not found! very strange!');
  45.     }
  46.  
  47.     // return the random file:
  48.     return $folder . "/" . $files[$rand];
  49.  
  50. }
  51.  
  52.  
  53. $random1 = RandomFile("random");
  54. while (!$random2 || $random2 == $random1) {
  55. 	$random2 = RandomFile("random");
  56. }
  57. while (!$random3 || $random3 == $random1 || $random3 == $random2) {
  58. 	$random3 = RandomFile("random");
  59. }
  60. while (!$random4 || $random4 == $random1 || $random4 == $random2 || $random4 == $random3) {
  61. 	$random4 = RandomFile("random");
  62. }
  63. ?>
  64.  
  65. // place this section where you'd like to display the images:
  66.  
  67. <div id="random_images">
  68.   <img src="/<?php echo $random1; ?>" alt="image alt" />
  69.   <img src="/<?php echo $random2; ?>" alt="image alt" />
  70.   <img src="/<?php echo $random3; ?>" alt="image alt" />
  71.   <img src="/<?php echo $random4; ?>" alt="image alt" />
  72. </div>

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