PHP Array into array - error

Question

I'm trying to add an array into an other array at a specific key. But I have this message :

array_push() expects parameter 1 to be array, null given

I don't understand because in the else I create the array.

$key = $this->input->get('vente');
if(array_key_exists($key,$this->session->userdata('panier'))){
    array_push($this->session->userdata('panier')[$key],$toAdd);
}else{
    $this->session->userdata('panier')[$key] = array();
    array_push($this->session->userdata('panier')[$key],$toAdd);
}

Thanks arkascha, but I want put the array at this index. Not at the end of the array. — Romain Caron
– Romain Caron, Commented Feb 8, 2016 at 20:14

Gwendal · Accepted Answer · 2016-02-08 20:21:37Z

1

$this->session->userdata return an array but you can't modify it directly. Try this :

<?php 
// Storing the session item in a var
$panier = $this->session->userdata('panier');

// $this->session->userdata return null when the item doesn't exist, so we have to check it
if (empty($panier)) $panier = array();

$key = $this->input->get('vente');

if( array_key_exists($key, $panier) ) {
    array_push($panier[$key], $toAdd);
} else {
    $this->session->userdata('panier')[$key] = array();
    array_push($panier[$key], $toAdd);
}

// Then, we set the var in session again !
$this->session->set_userdata('panier', $panier);

Don't hesitate if you need more explanations.

answered Feb 8, 2016 at 20:21

Gwendal

1,2737 silver badges17 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Romain Caron Over a year ago

Thanks a lot Gwendal. I didn't think that I can't modify it directly. You save my night ;)

Gwendal Over a year ago

Ca me fait plaisir @RomainCaron :)

Collectives™ on Stack Overflow

PHP Array into array - error

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related