<?php  
class ResizerHelper extends AppHelper { 
    var $helpers = array('Html'); 
    var $cacheDir = 'image_cache'; // relative to IMAGES_URL path 
 
    /** 
     * Automatically resizes an image and returns formatted IMG tag 
     * 
     * @param string $path Path to the image file, relative to the webroot/img/ directory. 
     * @param integer $width Image of returned image 
     * @param integer $height Height of returned image 
     * @param boolean $aspect Maintain aspect ratio (default: true) 
     * @param array    $htmlAttributes Array of HTML attributes. 
     * @param boolean $return Wheter this method should return a value or output it. This overrides AUTO_OUTPUT.
     * @return mixed    Either string or echos the value, depends on AUTO_OUTPUT and $return. 
     * @access public 
     */ 
    function resize($path, $width, $height, $aspect = true, $htmlAttributes = array(), $return = false) {
        $types = array(1 => "gif", "jpeg", "png", "swf", "psd", "wbmp"); // used to determine image type
        $fullpath = ROOT.DS.APP_DIR.DS.WEBROOT_DIR.DS;
        $url = $fullpath.$path; 
        if (!($size = getimagesize($url)))  
            return; // image doesn't exist 
        if ($aspect) { // adjust to aspect. 
            if (($size[1]/$height) > ($size[0]/$width))  // $size[0]:width, [1]:height, [2]:type
                $width = ceil(($size[0]/$size[1]) * $height); 
            else  
                $height = ceil($width / ($size[0]/$size[1])); 
        } 
        $relfile = $this->webroot.$this->cacheDir.'/'.$width.'x'.$height.'_'.basename($path); // relative file 
        $cachefile = $fullpath.$this->cacheDir.DS.$width.'x'.$height.'_'.basename($path);  // location on server 
        if (file_exists($cachefile)) { 
            $csize = getimagesize($cachefile); 
            $cached = ($csize[0] == $width && $csize[1] == $height); // image is cached 
            if (@filemtime($cachefile) < @filemtime($url)) // check if up to date 
                $cached = false; 
        } else { 
            $cached = false; 
        } 
        if (!$cached) { 
            $resize = ($size[0] > $width || $size[1] > $height) || ($size[0] < $width || $size[1] < $height);
        } else { 
            $resize = false; 
        } 
        if ($resize) { 
            $image = call_user_func('imagecreatefrom'.$types[$size[2]], $url); 
            if (function_exists("imagecreatetruecolor") && ($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], $size[1]);
            } 
            call_user_func("image".$types[$size[2]], $temp, $cachefile); 
            imagedestroy ($image); 
            imagedestroy ($temp); 
        }          
        return $this->output(sprintf($this->Html->tags['image'], $relfile, null), $return); 
    } 
}
?>

var $helpers    = array('Html', 'Form', 'Session', 'Resizer');

<?php echo $this->Resizer->resize($image['url'], 150, 150, true) ?>

function __upload($file_array){
    $file = new File($file_array['tmp_name']);
    $file_base = pathinfo($file_array['name']);;
    $ext = strtolower($file_base['extension']);
    if ($ext != 'jpg' && $ext != 'jpeg' && $ext != 'gif' && $ext != 'png') {
        $this->Session->setFlash('You may only upload image files.');
        $this->render();
    } else {
        $data = $file->read();
        $file->close();
        $full_path = '/upload_images/'.$file_array['name'];
        $file = new File(WWW_ROOT.$full_path, true);
        $file->write($data);
        $file->close();
         return $full_path;
    }
    return 'Ouch!';
}

function admin_add() {
    if (!empty($this->data)) {
            $this->data['News']['image'] = $this->__upload($this->data['News']['image']);
            $this->News->create();
        if ($this->News->save($this->data)) {
            $this->Session->setFlash(__('The news has been saved', true));
            $this->redirect(array('action' => 'index'));
        } else {
            $this->Session->setFlash(__('The news could not be saved. Please, try again.', true));
        }
    }
}

echo $this->Form->input('title');
echo $this->Form->input('title');
echo $this->Form->input('subtitle');
echo $this->Form->input('body');
if($this->data['News']['image'] != '')
    echo $this->Html->image($this->data['News']['image'],array('height' => '50'));
echo $this->Form->file('image');
echo $this->Form->checkbox('active');
echo $this->Form->input('publish_date');

function admin_edit($id = null) {
    if (!$id && empty($this->data)) {
        $this->Session->setFlash(__('Invalid news', true));
        $this->redirect(array('action' => 'index'));
    }
    if (!empty($this->data)) {
        if(!empty($this->data['News']['image']['name']))
            $this->data['News']['image'] = $this->__upload($this->data['News']['image']);
        else unset($this->data['News']['image']);
        if ($this->News->save($this->data)) {
            $this->Session->setFlash(__('The news has been saved', true));
            $this->redirect(array('action' => 'index'));
        } else {
            $this->Session->setFlash(__('The news could not be saved. Please, try again.', true));
        }
    }
    if (empty($this->data)) {
        $this->data = $this->News->read(null, $id);
    }
}