I have recently battled with the same problem as you OmarC I can
explain whats happening to you but unfortunately there is no real
solution.
The two major php.ini settings which can be explained for uploads are
as follows:
post_max_size - sets max size of post data allowed. (We will work on
8M default)
upload_max_filesize - contains the maximum size of a file which can be
uploaded via a form. (We will work on 2M default);
The post_max_size is generally higher than the upload_max_filesize as
the post_max_size must encompass all the other form inputs as well as
the file to upload. This being said please follow on below.
Firstly the code in the controller can execute but you cant do a check
on $this->data in the scenario you propose cause the $_POST and
$_FILES globals will be emtpy. Consider these four scenarios
Scenario 1
The user does not upload anything then cakes validation fires on your
other form inputs and you are a happy man. In this scenario the $this-
>data array contains info and the $_POST and $_FILES contain
information as well.
In this Scenario the post_max_size is never reached so the global
variables $_POST and $_FILES exist and errors can be captured.
UPLOAD_ERR_OK is set (Value: 0; There is no error, the file uploaded
with success).
Scenario 2
The user uploads a file size less than 2M in which case the
upload_max_filesize validates, the post_max_size is never reached,
cakes validation fires on the rest of your data and again you are a
happy man. Again the $_POST and $_FILES is set.
UPLOAD_ERR_OK is set (Value: 0; There is no error, the file uploaded
with success).
Scenario 3
The user uploads a file size greater than the upload_max_filesize BUT
less than the post_max_size. Again the $_POST and $_FILES are set and
the error can be captured
UPLOAD_ERR_INI_SIZE (Value: 1; The uploaded file exceeds the
upload_max_filesize directive in php.ini.)
Scenario 4 (the one you are experiencing)
The user uploads a file which is greater than the post_max_size (in
this example is 8M), now here is where the headache begins, because
the file being uploaded exceeds the post_max_size the $_POST and
$_FILES globals ARE NOT SET AT ALL. This means that all the data which
was submitted from your form is empty, this means that because cakes
functions generally checks for if(!empty($this->data)) it loads the
page as if the user just requested the url.
Solution
The only solution i can offer you is how to catch the error if a user
exceeds the post_max_size.
//uploads_controller.php
function add() {
if($this->referer() == '/uploads/uploadFile'){
$this->set('msg', 'please choose a file smaller
than.'.ini_get
('upload_max_filesize'));
}
}
function uploadFile(){
if (!empty($this->data)) {
if($this->data['Upload']['source']['error'] ==
UPLOAD_ERR_OK){
$this->Session->setFlash(__('Work your magic',
true));
}else{
$errorMsg =
$this->fileUploadErrorMessage($this->data['Upload']
['source']['error']);
$this->Session->setFlash(__('Error:
'.$errorMsg));
}
}else{
if(!is_uploaded_file($this->data['Upload']['source']['tmp_name'])
&& ($this->referer() == '/uploads/add')){
$this->Session->setFlash(__('Form data greater
than php.ini
allows', true));
$this->redirect('add');
}
}
}
//views/uploads/add.ctp
<div class="uploads form">
<?php echo $form->create('Upload', array('type' => 'file', 'action'
=> ('uploadFile')));?>
<fieldset>
<legend><?php __('Add Upload');?></legend>
<?php
echo $form->input('source', array('type' => 'file'));
echo $form->input('dummy');
?>
</fieldset>
<?php echo $form->end('Submit');?>
</div>
Hope this helps ya.
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