Resizing image in php after file_get_contents - php

Question

Can anybody tell me how I can solve the following issue:
include('php/resizeImage.php');
if($_POST['uploadlink']){
$url = $_POST['uploadlink'];
$urlImage = file_get_contents($url);
if ($_POST['filename']){
$filename = $_POST['filename'].".jpg";
} else {
$urlinfo = parse_url($url);
$filename = basename($urlinfo['path']);
}
$image = new ResizeImage();
$image->load($filename);
$image->resizeToWidth(300);
$image->save($filename);
file_put_contents("images/upload/".$filename, $urlImage);
}
After I have received the image data from file_get_contents from a URL I want to resize it through my resizeImage script which takes the filename of the image as a parameter.
Edit: ResizeImage function load and resizeToWidth:
function load($filename) {
$image_info = getimagesize($filename);
$this->image_type = $image_info[2];
if( $this->image_type == IMAGETYPE_JPEG ) {
$this->image = imagecreatefromjpeg($filename);
} elseif( $this->image_type == IMAGETYPE_GIF ) {
$this->image = imagecreatefromgif($filename);
} elseif( $this->image_type == IMAGETYPE_PNG ) {
$this->image = imagecreatefrompng($filename);
}
}
function resizeToWidth($width) {
$ratio = $width / $this->getWidth();
$height = $this->getheight() * $ratio;
$this->resize($width,$height);
}
I have no trouble doing it when the user selects a local image through input type='file'.
if (isset($_FILES["uploadedfile"])){
$ufilename = $_FILES["uploadedfile"]["name"];
$ufiletmpname = $_FILES["uploadedfile"]["tmp_name"];
$image = new ResizeImage();
$image->load($ufiletmpname);
$image->resizeToWidth(300);
$image->save($ufiletmpname);
}
Another problem:
I forward the name of the user to my script because I want to create an individual folder for each user, so they only can see their own uploaded images.
$admin = $_GET['admin'];
file_put_contents("images/upload/".$admin."/".$filename, $urlImage);
Why is this not working for me?
Thanks.

Answer 1

Easy.
Just alter the code of whatever yours ResizeImage class to make it able to operate the image binary contents in addition to filename.
Your second question is quite simple too.
Setup your PHP installation to make it display errors on the screen (for the development server, of course!) and you will see the exact answer to your question, "Why is this not working for me?".
error_reporting(E_ALL);
ini_set('display_errors',1);
usually helps.
(also be sure your code do not do any HTTP redirects which may conceal the error messages from you)

Answer 2

What's ResizeImage?
If it were me, I'd do:
$data = file_get_contents($name);
$image = imagecreatefromstring($data);
// resize the image

Answer 3

For your first question, the ResizeImage is your own class, or something you downloaded from the net. To help you, we need to see it.
For the second part, file_put_contents won't create directories to you, to do that, you need to use the mkdir function.