Tạo ảnh thumnail trong CakePHP

<?php
class ImagesController extends AppController {
 
  var $name = 'Images';
  var $uses = array();
 
  // variables
  var $cache_dir = 'img/cache';
  var $types = array(1 => "gif", "jpeg", "png", "swf", "psd", "wbmp", "jpg");
 
 
  /**
   * displays and resizes an image
   * @width 	= width to resize image to
   * @height 	= height to resize image to
   * @resize 	= true/false
   * @src 	= src dir of image from root
   */
  function view($width, $height, $noresize = 'resize') {
    // get params    
    $url = $this->_get_url($this->params['pass']);
 
    // get full image path
    $full_path = WWW_ROOT.$url;
 
    // check file exists
    if(file_exists($full_path)) {
      // get size of image
      $size	= getimagesize($full_path);
      // get mimetype
      $mime	= $size['mime'];
 
      // if either width or height is an asterix
      if($width == '*' || $height == '*') {
        if($height == '*') {
          // recalculate height
          $height = ceil($width / ($size[0]/$size[1]));
        } else {
          // recalculate width
          $width = ceil(($size[0]/$size[1]) * $height);
        }
      } else {
        if (($size[1]/$height) > ($size[0]/$width)) {
          $width = ceil(($size[0]/$size[1]) * $height);
        } else {
          $height = ceil($width / ($size[0]/$size[1]));
        }
      }
 
      // include folder in filename
      $dir_path = preg_replace("/[^a-z0-9_]/", "_", strtolower(dirname($url)));
      $dir_path .= '-'.basename($url);
 
      // create new file names
      $file_relative = $this->cache_dir.'/'.$width.'x'.$height.'_'.$dir_path;
      $file_cached = WWW_ROOT.$this->cache_dir.DS.$width.'x'.$height.'_'.$dir_path;
 
      // if cached file already exists
      if(file_exists($file_cached)) {
        // get image sizes
        $csize = getimagesize($file_cached);
        // check that cached file is correct dimensions
        $cached = ($csize[0] == $width && $csize[1] == $height);
        // check file age
        if (@filemtime($cachefile) < @filemtime($url))
          $cached = false;
      } else {
        $cached = false;
      }
 
      // if file not cached
      if(!$cached) {
        $resize = ($size[0] > $width || $size[1] > $height) || ($size[0] < $width || $size[1] < $height);
      } else {
        $resize = false;
      }
 
 
      // do not resize if set to true
      if($noresize == 'true') {
        $resize = false;
        $cached = false;
      }
 
      // if image resize is necessary
      if($resize) {
        // image
        $image = call_user_func('imagecreatefrom'.$this->types[$size[2]], $full_path);
        if (function_exists("imagecreatetruecolor") && ($temp = imagecreatetruecolor ($width, $height))) {
          imagecopyresampled ($temp, $image, 0, 0, 0, 0, $width, $height, $size[0], $size[1]);
        } else {
          $temp = imagecreate($width, $height);
          imagecopyresized($temp, $image, 0, 0, 0, 0, $width, $height, $size[0], $size[1]);
        }
        call_user_func("image".$this->types[$size[2]], $temp, $file_cached);
        imagedestroy($image);
        imagedestroy($temp);
      } elseif(!$cached) {
        // copy original file
        copy($full_path, $file_cached);
      }
 
      // get file contents
      $data	= file_get_contents($file_cached);
    } else {
      $size	= getimagesize($full_path);
      $mime	= $size['mime'];
      $data = file_get_contents($full_path);
    }
 
    // set headers and output image
    header("Content-type: $mime");
    header('Content-Length: ' . strlen($data));
    echo $data;
    exit();
  }
 
 
  /**
   * gets the url from the parameters
   */
  function _get_url($params) {
    // init
    $url = '';
    // unset unwanted params
    unset($params[0], $params[1], $params[2]);
    // loop through params
    foreach($params as $p) {
      $url .= $p.'/';
    }
    // remove last slash
    $url = substr($url, 0, strrpos($url, '/'));
    return $url;
  }
}
?>

<img src="<?php echo 'http://localhost/test_cake/images/view/140/90/resize/files/news/abc.jpg';?>" alt=""/>