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   1  <?php
   2  //////////////////////////////////////////////////////////////

   3  ///  phpThumb() by James Heinrich <info@silisoftware.com>   //

   4  //        available at http://phpthumb.sourceforge.net     ///

   5  //////////////////////////////////////////////////////////////

   6  ///                                                         //

   7  // phpThumb.demo.random.php                                 //

   8  // James Heinrich <info@silisoftware.com>                   //

   9  //                                                          //

  10  // Display a random image from a specified directory.       //

  11  // Run with no parameters for usage instructions.           //

  12  //                                                          //

  13  //////////////////////////////////////////////////////////////

  14  
  15  function SelectRandomImage($dirname='.', $portrait=true, $landscape=true, $square=true) {
  16      // return a random image filename from $dirname

  17      // the last 3 parameters determine what aspect ratio of images

  18      // may be returned

  19      $possibleimages = array();
  20      if ($dh = opendir($dirname)) {
  21          while ($file = readdir($dh)) {
  22              if (is_file($dirname.'/'.$file) && eregi('\.(jpg|jpeg|gif|png|tiff|bmp)$', $file)) {
  23                  if ($gis = @GetImageSize($dirname.'/'.$file)) {
  24                      if ($portrait && ($gis[0] < $gis[1])) {
  25                          // portrait

  26                          $possibleimages[] = $file;
  27                      } elseif ($landscape && ($gis[0] > $gis[1])) {
  28                          // landscape

  29                          $possibleimages[] = $file;
  30                      } elseif ($square) {
  31                          // square

  32                          $possibleimages[] = $file;
  33                      }
  34                  }
  35              }
  36          }
  37          closedir($dh);
  38      }
  39      if (empty($possibleimages)) {
  40          return false;
  41      }
  42      if (phpversion() < '4.2.0') {
  43          mt_srand(time());
  44      }
  45      $randkey = mt_rand(0, count($possibleimages) - 1);
  46      return realpath($dirname.'/'.$possibleimages[$randkey]);
  47  }
  48  
  49  if (@$_REQUEST['dir']) {
  50      if (is_dir($_REQUEST['dir'])) {
  51  
  52          if (!@$_REQUEST['o']) {
  53              $_REQUEST['o'] = 'PLS';
  54          }
  55          $_REQUEST['o'] = strtoupper($_REQUEST['o']);
  56          $portrait  = (strpos(@$_REQUEST['o'], 'P') !== false);
  57          $landscape = (strpos(@$_REQUEST['o'], 'L') !== false);
  58          $square    = (strpos(@$_REQUEST['o'], 'S') !== false);
  59          $randomSRC = SelectRandomImage($_REQUEST['dir'], $portrait, $landscape, $square);
  60          if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN') {
  61              $randomSRC = str_replace('\\', '/', eregi_replace('^'.realpath(@$_SERVER['DOCUMENT_ROOT']), '', realpath($randomSRC)));
  62          } else {
  63              $randomSRC = str_replace(realpath(@$_SERVER['DOCUMENT_ROOT']), '', realpath($randomSRC));
  64          }
  65  
  66          $otherParams = array();
  67          foreach ($_GET as $key => $value) {
  68              if (($key == 'dir') || ($key == 'o')) {
  69                  continue;
  70              }
  71              if (is_array($value)) {
  72                  foreach ($value as $vkey => $vvalue) {
  73                      $otherParams[] = urlencode($key).'['.urlencode($vkey).']='.urlencode($vvalue);
  74                  }
  75              } else {
  76                  $otherParams[] = urlencode($key).'='.urlencode($value);
  77              }
  78          }
  79          header('Location: ./phpThumb/phpThumb.php?src='.urlencode($randomSRC).'&'.implode('&', $otherParams));
  80          exit;
  81  
  82      } else {
  83          die($_REQUEST['dir'].' is not a directory');
  84      }
  85  
  86  } else {
  87  
  88      echo '<html><body>Usage: <b>'.basename($_SERVER['PHP_SELF']).'?dir=<i>&lt;directory&gt;</i>&amp;<i>&lt;phpThumb parameters&gt;</i></b>&amp;o=<i>(P|L|S)</i><br><br>Examples:<ul>';
  89      echo '<li>'.basename($_SERVER['PHP_SELF']).'?./images/&o=L <i>(landscape images only)</i></li>';
  90      echo '<li>'.basename($_SERVER['PHP_SELF']).'?./images/&o=PS <i>(portrait or square images only)</i></li>';
  91      echo '</ul></body></html>';
  92  
  93  }
  94  
  95  ?>