imagick error: 'unable to open image' image upload - image-uploading

Question

I get the following error when trying to process uploaded images with imagick.
Fatal error: Uncaught exception 'ImagickException' with message 'unable to open image `9eK59iu.jpg': No such file or directory # error/blob.c/OpenBlob/2644' in D:\PATH\upload.php on line 77
The code looks like this:
<?php
$new_folder_name = "D:/PATH/content";
mkdir("$new_folder_name",0700);
$tmp_img = $_FILES["upload_file"]["tmp_name"];
$img = new Imagick($tmp_img);
$img->thumbnailImage(100 , 100 , TRUE);
$img->writeImage($new_folder_name);
?>
Without imagick the image upload works just fine.
Only imagick won't open the image given to $_FILES
I also tried to open the image with imagick, after move_uploaded_file, like this:
<?php
$extension = pathinfo($upload_file_name, PATHINFO_EXTENSION);
$new_upload_file_name = rand(00000, 99999).".".$extension;
$new_folder_name = "D:/PATH/content".time();
mkdir("$new_folder_name",0700);
$path_to_file = $new_folder_name."/".$new_upload_file_name;
move_uploaded_file($_FILES["upload_file"]["tmp_name"],$path_to_file);
$img = new Imagick($path_to_file);
$img->thumbnailImage(100 , 100 , TRUE);
$img->writeImage($new_folder_name);
?>
neither works.. :-(
Any suggestion?

Answer 1

Read the file upload docs. The server-side temporary filename assigned by PHP to store the uploaded file in ['tmp_name'] in the $_FILES array. You're trying to use the client-side user-provided ['name'], which DOES NOT exist anywhere on your server.
$tmp_img = $_FILES["upload_file"]["tmp_name"];
^^^^
You are also simply assuming that the upload has succeed. That is NOT a good thing. Never EVER assume success with dealing with remote resources (web apis, file uploads, database operations, etc...). ALWAYS check for errors:
if ($_FILES['upload_file']['error'] !== UPLOAD_ERR_OK) {
die("Upload failed with error code " . $_FILES['upload_file']['error']);
}