Casting an Array with Numeric Keys as an Object

Question

I was poking around PHPs casting mechanism, and ran into an odd case when casting an array as an object

$o = (object) array(\'1\'=>\'/foo/bar\');   
$o =          


        

Answer 1

Yes, they are just locked away unless cast back to an array.

Maybe, the properties are still there and are accessible, just not directly. However, I'm not sure how foreach works internally (it might cast the object to an array) as I have not dived in the source code.

Example:

$array = array('one', 'two', 'three', 'four');
$obj = (object) $array;

foreach ($obj as $key => &$val) {
    print "$key -> $val
";
    $val = 'Nhaca';
    var_dump($obj);
}
print_r($obj);
print_r($array);

output:

0 -> one
object(stdClass)[1]
  &string 'Nhaca' (length=5)
  string 'two' (length=3)
  string 'three' (length=5)
  string 'four' (length=4)
1 -> two
object(stdClass)[1]
  string 'Nhaca' (length=5)
  &string 'Nhaca' (length=5)
  string 'three' (length=5)
  string 'four' (length=4)
2 -> three
object(stdClass)[1]
  string 'Nhaca' (length=5)
  string 'Nhaca' (length=5)
  &string 'Nhaca' (length=5)
  string 'four' (length=4)
3 -> four
object(stdClass)[1]
  string 'Nhaca' (length=5)
  string 'Nhaca' (length=5)
  string 'Nhaca' (length=5)
  &string 'Nhaca' (length=5)
stdClass Object ( [0] => Nhaca [1] => Nhaca [2] => Nhaca [3] => Nhaca ) 
Array ( [0] => one [1] => two [2] => three [3] => four )