Trying to set array variable from part of another array variable - php

Question

I'm trying to set a part of array variable into a new array variable like below:
$this->data['uploadFront'] = array();
$this->data['uploadFront'] = $this->data['Card']['uploadFront'];
But I'm getting undefined index error.
The $this->data['Card'] array is like below:
Array
(
[Card] => Array
(
[name] =>
[company_name] =>
[firstname] =>
[lastname] =>
[position] =>
[location] =>
[phone] =>
[website] =>
[mobile] =>
[comp_name] => 0
[uploadFront] => Array
(
[name] =>
[type] =>
[tmp_name] =>
[error] => 4
[size] => 0
)
[uploadBack] => Array
(
[name] =>
[type] =>
[tmp_name] =>
[error] => 4
[size] => 0
)
)
)
What could be wrong that needs to be fixed in this process?

Answer 1

$this->data['uploadFront'][] = $this->data['Card']['uploadFront'];
If you want to append to array, you have to use [] to show that you are appending, not assinging.

Answer 2

Sorry, I didn't read your post right the first time.
As Catalin told you, if your array is what you tell us, ie $this->data['Card'] = ARRAY, you're creating an unnecessary extra level: two times 'Card', so ['Card']['Card']. I propose you define $this->data as what you told is your array, and then ask to copy ['uploadFront'] to the first level of your $this->data array. In what you described you're trying to access an unexisting part of the array.
In code (probably you'll need to declare the $this->data array somewhere else in your classes, but for the sake of explaining I write it down like this):
$this->data = array
(
'Card' => array
(
'name' => '',
'company_name' => '',
...
'uploadFront' => array
(
'name' =>'',
'type' => '',
'tmp_name' => '',
'error' => '4',
'size' => '0'
)
'uploadBack' => array
(
...
)
)
$this->data['uploadFront'] = $this->data['Card']['uploadFront'];