Codice PHP:
<?php
class ImageComponent extends Object
{
function upload_image_and_thumbnail($data, $datakey, $imgscale, $thumbscale, $folderName, $square) {
if (strlen($data['Image'][$datakey]['name'])>4){
$error = 0;
$tempuploaddir = realpath("../../app/webroot/img/temp");
$biguploaddir = realpath("../../app/webroot/img/").'/'.$folderName."/big";
$smalluploaddir = realpath("../../app/webroot/img/").'/'.$folderName."/small";
// Make sure the required directories exist, and create them if necessary
if(!is_dir($tempuploaddir)) mkdir($tempuploaddir,true);
if(!is_dir($biguploaddir)) mkdir($biguploaddir,true);
if(!is_dir($smalluploaddir)) mkdir($smalluploaddir,true);
$filetype = $this->getFileExtension($data['Image'][$datakey]['name']);
$filetype = strtolower($filetype);
if (($filetype != "jpeg") && ($filetype != "jpg") && ($filetype != "gif") && ($filetype != "png") && ($filetype != "tif"))
{
// verify the extension
return;
}
# convert type
if ($filetype == "tif") {
$flagtif = true;
} else {
$flagtif = false;
}
# -------
#$imgsize = GetImageSize($data['Image'][$datakey]['tmp_name']);
// Generate a unique name for the image (from the timestamp)
$id_unic = str_replace(".", "", strtotime ("now"));
$filename = $id_unic;
settype($filename,"string");
$filename.= ".";
$filename.=$filetype;
$tempfile = $tempuploaddir . "/$filename";
$resizedfile = $biguploaddir . "/$filename";
$croppedfile = $smalluploaddir . "/$filename";
# convert tif in jpg
if ($flagtif) {
if (is_uploaded_file($data['Image'][$datakey]['tmp_name'])) {
if (copy($data['Image'][$datakey]['tmp_name'],"$tempfile")) {
$newName = preg_replace('#\.tif$#', '.jpg', $filename);
require 'phmagick/phmagick.php';
$p = new phmagick($tempfile, $tempuploaddir."/".$newName);
$p->debug=true;
$p->convert();
unlink($tempuploaddir."/".$filename);
$filename = $newName;
$tempfile = $tempuploaddir."/".$filename;
$resizedfile = $biguploaddir . "/$filename";
$croppedfile = $smalluploaddir . "/$filename";
}
}
} else {
if (is_uploaded_file($data['Image'][$datakey]['tmp_name']))
{
// Copy the image into the temporary directory
if (!copy($data['Image'][$datakey]['tmp_name'],"$tempfile"))
{
print "Error Uploading File!.";
exit();
}
}
}
/*
* Generate the big version of the image with max of $imgscale in either directions
*/
$this->resize_img($tempfile, $imgscale, $resizedfile);
if($square) {
/*
* Generate the small square version of the image with scale of $thumbscale
*/
$this->crop_img($tempfile, $thumbscale, $croppedfile);
}
else {
/*
* Generate the big version of the image with max of $imgscale in either directions
*/
$this->resize_img($tempfile, $thumbscale, $croppedfile);
}
// Delete the temporary image
unlink($tempfile);
// Image uploaded, return the file name
return $filename;
}
}
function delete_image($filename,$folderName) {
unlink("../../app/webroot/img/".$folderName."/big/".$filename);
unlink("../../app/webroot/img/".$folderName."/small/".$filename);
}
function crop_img($imgname, $scale, $filename) {
$filetype = $this->getFileExtension($imgname);
$filetype = strtolower($filetype);
switch($filetype){
case "jpeg":
case "jpg":
$img_src = ImageCreateFromjpeg ($imgname);
break;
case "gif":
$img_src = imagecreatefromgif ($imgname);
break;
case "png":
$img_src = imagecreatefrompng ($imgname);
break;
}
$width = imagesx($img_src);
$height = imagesy($img_src);
$ratiox = $width / $height * $scale;
$ratioy = $height / $width * $scale;
//-- Calculate resampling
$newheight = ($width <= $height) ? $ratioy : $scale;
$newwidth = ($width <= $height) ? $scale : $ratiox;
//-- Calculate cropping (division by zero)
$cropx = ($newwidth - $scale != 0) ? ($newwidth - $scale) / 2 : 0;
$cropy = ($newheight - $scale != 0) ? ($newheight - $scale) / 2 : 0;
//-- Setup Resample & Crop buffers
$resampled = imagecreatetruecolor($newwidth, $newheight);
$cropped = imagecreatetruecolor($scale, $scale);
//-- Resample
imagecopyresampled($resampled, $img_src, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
//-- Crop
imagecopy($cropped, $resampled, 0, 0, $cropx, $cropy, $newwidth, $newheight);
// Save the cropped image
switch($filetype)
{
case "jpeg":
case "jpg":
imagejpeg($cropped,$filename,80);
break;
case "gif":
imagegif($cropped,$filename,80);
break;
case "png":
imagepng($cropped,$filename,80);
break;
}
}
function resize_img($imgname, $size, $filename) {
$filetype = $this->getFileExtension($imgname);
$filetype = strtolower($filetype);
switch($filetype) {
case "jpeg":
case "jpg":
$img_src = ImageCreateFromjpeg ($imgname);
break;
case "gif":
$img_src = imagecreatefromgif ($imgname);
break;
case "png":
$img_src = imagecreatefrompng ($imgname);
break;
}
$true_width = imagesx($img_src);
$true_height = imagesy($img_src);
if ($true_width>=$true_height)
{
$width=$size;
$height = ($width/$true_width)*$true_height;
}
else
{
$width=$size;
$height = ($width/$true_width)*$true_height;
}
$img_des = ImageCreateTrueColor($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($img_des,$filename,80);
break;
case "gif":
imagegif($img_des,$filename,80);
break;
case "png":
imagepng($img_des,$filename,80);
break;
}
}
function getFileExtension($str) {
$i = strrpos($str,".");
if (!$i) { return ""; }
$l = strlen($str) - $i;
$ext = substr($str,$i+1,$l);
return $ext;
}
} ?>
grazie 
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