array_diff() failing while filtering object arrays

Question

I'm trying to "diff" two arrays and PHP is returning the following error:

Catchable fatal error: Object of class Node could not be converted to string in D:\projetos\labs\dok\dev\application\models\dok.php on line 410

my arrays are, respectively:

array(2)
    object(Node)#5 ...[7 attributes]
    object(Node)#6 ...[7 attributes]

array(1)
    object(Node)#5 ....[7 attributes]

I would really appreciate some help here as I have no clue of what's going on.

as requested, the code around the diff:

// is it a distant child?
$all_childs = $node->get_childs(true);
$distant_childs = array_diff($all_childs, $childs);
if(in_array($this, $distant_childs))
    return 'distant-child';

array_diff() returns empty result when filtering two object arrays — mickmackusa
– mickmackusa ♦, Commented Nov 13, 2024 at 1:09

xdazz · Accepted Answer · 2012-02-13 02:40:03Z

2

Note:

Two elements are considered equal if and only if (string) $elem1 === (string) $elem2. In words: when the string representation is the same.

If the element is object, you need to provide __toString() method for the object, or you did it by yourself.

answered Feb 13, 2012 at 2:40

xdazz

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1 Comment

Hugo Mota Over a year ago

wow! it worked just with a simple serialize()! I have to confess that i'm seeing this as a php "bug" :(

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