I have spent many hours to see articles about resizing and uploading image in cakePHP, almost of them are sounding sucks for me like resizing on View by accessing or injecting the url or copy paste by another written without testing code. Event I was trying to convert AkImage from Akelos (Closer to ImageMagick in Rails) but got bunch of errors.

Any way i got article from sobbour website, but i am not satisfied with the code because the component automatically resize for big and thumb by 2 method directly, it will make bounced my hosting with trash image. And some lines were not realible any more with CakePHP, here is my modified Code (save it to /appName/controller/components/image.php)

class ImageComponent extends Object
{
var  $contentType =  array('image/jpg','image/bmp','image/jpeg','image/gif','image/png','image/pjpg','image/pbmp','image/pjpeg','image/ppng','image/pgif');
function  upload_image_and_thumbnail($fileData,$size,$subFolder,$prefix) {
if  (strlen($fileData['name'])>4)
 {
$error =  0;
$destFolder =  WWW_ROOT.$subFolder;
$realFileName  = $fileData['name'];
if(!is_dir($destFolder))  mkdir($destFolder,true);
  $filetype = $this->getFileExtension($fileData['name']);
$filetype  = strtolower($filetype);
if(!in_array($fileData['type'],$this->contentType)){
return false;exit();
}
else if($fileData['size'] > 700000 ){
return false;exit();
}
else
{
$imgsize =  GetImageSize($fileData['tmp_name']);
}
 if  (is_uploaded_file($fileData['tmp_name']))
 {
if  (!copy($fileData['tmp_name'],$destFolder.'/'.$realFileName ))
{
 return false;
exit();
}
else  {
  $this->resize_img($destFolder.'/'.$realFileName, $size,  $destFolder.'/'.$prefix.$realFileName);
 unlink($destFolder.'/'.$realFileName);
 }
 }
return  $fileData;
}
}
function delete_image($filename)
{
unlink($filename);
}
function  resize_img($tempFile, $size, $newFile)
{
$filetype =  $this->getFileExtension($tempFile);
$filetype =  strtolower($filetype);
switch($filetype) {
case "jpeg":
case "jpg":
 $img_src  = imagecreatefromjpeg($tempFile);
 break;
case "gif":
$img_src = imagecreatefromgif  ($tempFile);
break;
case "png":
$img_src = imagecreatefrompng  ($tempFile);
 case "bmp":
$img_src = imagecreatefromwbmp  ($tempFile);
break;
}
$true_width  = imagesx($img_src);
$true_height = imagesy($img_src);

$size = explode('x',strtolower($size));
if  ($true_width>=$true_height)
{
 $width=$size[0];
 $height =  ($width/$true_width)*$true_height;
}
else
{
 $height=$size[1];
 $width =  ($height/$true_height)*$true_width;
}
$img_des =  imagecreatetruecolor($width,$height);
imagecopyresampled  ($img_des, $img_src, 0, 0, 0, 0, $width, $height, $true_width,  $true_height);
// Save the resized image
switch($filetype)
{
 case "jpeg":
 case "jpg":
 imagejpeg($img_des,$newFile,80);
 break;
 case "gif":
 imagegif($img_des,$newFile,80);
break;
case  "png":
imagepng($img_des,$newFile,80);
case "bmp":
imagewbmp($img_des,$newFile,80);
break;
}
}
function  getFileExtension($str)
{
$i  = strrpos($str,".");
if (!$i) { return ""; }
$l =  strlen($str) - $i;
$ext = substr($str,$i+1,$l);
return $ext;
}
}

class  ImageComponent extends Object

{

var  $contentType =  array('image/jpg','image/bmp','image/jpeg','image/gif','image/png','image/pjpg','image/pbmp','image/pjpeg','image/ppng','image/pgif');

function  upload_image_and_thumbnail($fileData,$size,$subFolder,$prefix) {

if  (strlen($fileData['name'])>4)

 {

$error = 0;

$destFolder = WWW_ROOT.$subFolder;

$realFileName = $fileData['name'];

if(!is_dir($destFolder))  mkdir($destFolder,true);

 $filetype =  $this->getFileExtension($fileData['name']);

$filetype  = strtolower($filetype);

if(!in_array($fileData['type'],$this->contentType)){

return false;exit();

}

else if($fileData['size'] >  700000 ){

return  false;exit();

}

else

{

$imgsize =  GetImageSize($fileData['tmp_name']);

}

 if  (is_uploaded_file($fileData['tmp_name']))

 {

if  (!copy($fileData['tmp_name'],$destFolder.'/'.$realFileName ))

{

 return false;

exit();

}

else  {

  $this->resize_img($destFolder.'/'.$realFileName, $size,  $destFolder.'/'.$prefix.$realFileName);

  unlink($destFolder.'/'.$realFileName);

 }

 }

return $fileData;

}

}

function  delete_image($filename)

{

unlink($filename);

}

function  resize_img($tempFile, $size, $newFile)

{

$filetype =  $this->getFileExtension($tempFile);

$filetype =  strtolower($filetype);

switch($filetype) {

case "jpeg":

case "jpg":

 $img_src  = imagecreatefromjpeg($tempFile);

 break;

case "gif":

$img_src = imagecreatefromgif  ($tempFile);

break;

case "png":

$img_src = imagecreatefrompng  ($tempFile);

  case "bmp":

$img_src  = imagecreatefromwbmp ($tempFile);

break;

}

$true_width  = imagesx($img_src);

$true_height = imagesy($img_src);



$size =  explode('x',strtolower($size));

if  ($true_width>=$true_height)

{

 $width=$size[0];

 $height =  ($width/$true_width)*$true_height;

}

else

{

 $height=$size[1];

 $width =  ($height/$true_height)*$true_width;

}

$img_des =  imagecreatetruecolor($width,$height);

imagecopyresampled  ($img_des, $img_src, 0, 0, 0, 0, $width, $height, $true_width,  $true_height);

// Save the resized image

switch($filetype)

{

 case "jpeg":

 case "jpg":

 imagejpeg($img_des,$newFile,80);

 break;

 case "gif":

 imagegif($img_des,$newFile,80);

break;

case  "png":

imagepng($img_des,$newFile,80);

case  "bmp":

imagewbmp($img_des,$newFile,80);

break;

}

}

function  getFileExtension($str)

{

$i = strrpos($str,".");

if  (!$i) { return ""; }

$l = strlen($str) - $i;

$ext  = substr($str,$i+1,$l);

return $ext;

}

}

And in your class instance method , run this line

<?php
class DeJavu extends Appcontroller {
var $components = array("Image");
function add(){
....any code....
$this->Image->upload_image_and_thumbnail($this->data['Webinfo']['file'],'150x150','img','logo_');
....any code....
}
}
?>

now I am happy to see my app can resize image without annoying script any more. Good Luck for you too.