What's this?

[haku]

Look at this code:

 

<?php
  $node = $form_state['node'] + (array)$node;
}
?>

 

I'm curious about it, as I have never seen code like this. First, how does the plus sign work in PHP? And what is (array)$node? This is new to me as well. Can anyone enlighten me?

[Mchl]

(array)$node cast $node variable to an array (basically makes sure it's an array)

http://www.php.net/language.types.type-juggling

 

How is it supposed to work with + however? Strange...

[PFMaBiSmAd]

Presumably $form_state['node'] is an array, in which case -

 

$a + $b Union of $a and $b.

...

The + operator appends elements of remaining keys from the right handed array to the left handed, whereas duplicated keys are NOT overwritten.

[haku]

Thanks guys, that answers my questions, and I see how it all works now.