PHP get keys from array in object

Question

I've got object and I need list of it's keys.

for now I doing that in foreach

foreach($obj as $key => $attribute){
  var_dump($key);
}

Is there some PHP built in function for getting object keys like array_keys for arrays?

trace

object(Solarium\QueryType\Select\Result\Document)#1383 (1) { ["fields":protected]=> array(31) { ["pdf_url"]=> string(51) "xxxxxxxxxxxx" ["title"]=> string(150) ......

There is get_object_vars() at php.net/manual/en/function.get-object-vars.php — arkascha
– arkascha, Commented Sep 22, 2016 at 7:18

Svitavsky · Accepted Answer · 2016-09-22 07:29:31Z

4

class A 
{
    private $a = 1;
    protected $b = 2;
    public $c = 3;
}

$object = new A();
$fields = get_object_vars($object);

But by this method, you can only get public fields from your object, i.e

print_r($fields);

Will output

Array ( [c] => 3 )

answered Sep 22, 2016 at 7:29

Svitavsky

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1 Comment

Stevan Tosic Over a year ago

I tried get_object_vars but it return empty array. I now see that I wrote wrong question because it was array in object, and there is no public property in obj.

Stevan Tosic · Accepted Answer · 2016-09-22 07:30:14Z

0

Problem is because it was

array in object.

I solve problem with this

array_keys($obj->getFields())

answered Sep 22, 2016 at 7:30

Stevan Tosic

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