Adding to dynamic variable variable array

Question

In my class, I have a public variable:

public $full_rows = array("text");

I want to be able to add to that array, like so:

$form->addarray("full_rows", array("url","name"));

So I have this function:

public function addarray($arrayname, $array = array()) {
    array_merge($this->$arrayname, $array);     
}

Except it's not affecting the array full_rows at all. Why not?

Edit Thanks to roullie for the correct answer. Turns out I'd forgotten that array_merge returns the merged array rather than just doing it. I thought it was a problem with variable variables (as I'd never used them before).

Here is my final function:

public function addarray($arrayname, $array = array()) {
    if((isset($this->$arrayname)) && (is_array($array))) {
        $this->{$arrayname} = array_merge($this->{$arrayname}, $array);
    } else {
        return false;   
    }
}

$form->addarray($form->full_rows, array("url","name")); ?

Professor Abronsius
– Professor Abronsius

2015-12-11 08:18:34 +00:00
Commented Dec 11, 2015 at 8:18 — Professor Abronsius
– Professor Abronsius, Commented Dec 11, 2015 at 8:18

roullie · Accepted Answer · 2015-12-11 08:18:46Z

1

set the value of the merged array to your $full_rows

public function addarray($arrayname, $array = array()) {
    $this->$arrayname = array_merge($this->$arrayname, $array);     
}

answered Dec 11, 2015 at 8:18

roullie

2,82019 silver badges26 bronze badges

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

2 Comments

Chud37 Over a year ago

Aah, I screwed up on array_merge. Thank you! But can you tell me why I couldnt write this: $this->$arrayname[] = "foo"; ?

Chud37 Over a year ago

Aah I figured it out. It needs to be: $this->{$arrayname}[] = "foo";

Collectives™ on Stack Overflow

Adding to dynamic variable variable array

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