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Basic PHP Image Rotation

/ Published in: PHP
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simple image rotation script; save as rotate.php in folder with images, call to display

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  1. //save in folder with images, refer in scriptAdd the script like you would add an image.  
  2. //<img src=”path-to-your-images/rotate.php”> 
  3. //images/home-page/rotate.php
  4. $folder = '.';
  5.  
  6. $extList = array();
  7. $extList['gif'] = 'image/gif';
  8. $extList['jpg'] = 'image/jpeg';
  9. $extList['jpeg'] = 'image/jpeg';
  10. $extList['png'] = 'image/png';
  11.  
  12. $img = null;
  13.  
  14. if (substr($folder,-1) != '/') {
  15.     $folder = $folder.'/';
  16. }
  17.  
  18. if (isset($_GET['img'])) {
  19.     $imageInfo = pathinfo($_GET['img']);
  20.     if (
  21.         isset( $extList[ strtolower( $imageInfo['extension'] ) ] ) &&
  22.         file_exists( $folder.$imageInfo['basename'] )
  23.     ) {
  24.         $img = $folder.$imageInfo['basename'];
  25.     }
  26. } else {
  27.     $fileList = array();
  28.     $handle = opendir($folder);
  29.     while ( false !== ( $file = readdir($handle) ) ) {
  30.         $file_info = pathinfo($file);
  31.         if (
  32.             isset( $extList[ strtolower( $file_info['extension'] ) ] )
  33.         ) {
  34.             $fileList[] = $file;
  35.         }
  36.     }
  37.     closedir($handle);
  38.  
  39.     if (count($fileList) > 0) {
  40.         $imageNumber = time() % count($fileList);
  41.         $img = $folder.$fileList[$imageNumber];
  42.     }
  43. }
  44.  
  45. if ($img!=null) {
  46.     $imageInfo = pathinfo($img);
  47.     $contentType = 'Content-type: '.$extList[ $imageInfo['extension'] ];
  48.     header ($contentType);
  49.     readfile($img);
  50. } else {
  51.     if ( function_exists('imagecreate') ) {
  52.         header ("Content-type: image/png");
  53.         $im = @imagecreate (100, 100)
  54.             or die ("Cannot initialize new GD image stream");
  55.         $background_color = imagecolorallocate ($im, 255, 255, 255);
  56.         $text_color = imagecolorallocate ($im, 0,0,0);
  57.         imagestring ($im, 2, 5, 5,  "IMAGE ERROR", $text_color);
  58.         imagepng ($im);
  59.         imagedestroy($im);
  60.     }
  61. }

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