CakePHP How to get data from csv file after upload - cakephp

Question

I created a form with input type file, button submit to access to a function in controller, the problem is I can't get data from that file.
in controller when I call :
function displayAll() {
$adherents = $_FILES['file']['tmp_name'];
prd($adherents);
}
I found this error
Undefined index: file [APP\controllers\adherents.php, line 36]
and this is the view:
<h2>Upload filer</h2>
<br>
<fieldset class="pano bleu">
<?php echo $this->Form->create('adherentsSuph', array('action'=>'displayAll'));?>
<?php
echo $this->Form->input('file', array('type' => 'file'));
echo $bouton->block(array(
'cancel'=>array('action'=>'index'),
'submit'=>array('id'=>'addAdherentFile')
));
echo $this->Form->end();?>
</fieldset>

Answer 1

Add 'type' => 'file' to your form options like this:
<?php echo $this->Form->create('adherentsSuph', array('action'=>'displayAll', 'type' => 'file')); ?>
Check if is a valid request and a valid file, then use file() to read the entire file into an array and loop it.
if (!empty($this->data)) {
if (is_file($this->data['file']['tmp_name'])) {
$file = file($this->data['file']['tmp_name']);
foreach ($file as $key => $row) {
var_dump($row); die;
}
}
}
See also:
file()
is_file()
Form > Options > Type
Field naming convention
Debug $this->data to check if you need to change $this->data['file'] to $this->data['adherentsSuph']['file']

Answer 2

Your question is of poor quality since you are giving incomplete code. I will try to help you anyway.
Please check the following things:
Are you using the CakePHP FormHelper?
If so make sure you initialize the Form with 'type' => 'file' (see here).
Finally check, what you get in $this->request->data in your Controller.