Deep copy of PHP array of references

Question

So $array is an array of which all elements are references.

I want to append this array to another array called $results (in a loop), but since they are references,

Answer 1

no need to compare array_map with serialize cause array_map is not useful.

$original = array('key'=>'foo');
$array_of_reference = array(&$original);
function myclone($value)
{
  return $value;
}
$array_by_myclone = array();
$array_by_myclone[] = array_map('myclone', $array_of_reference);

$array_by_assignment = array();
$array_by_assignment[] = $array_of_reference;

$original['key'] = 'bar';

var_dump($array_by_myclone[0][0]['key']); // bar, still a reference                                                                                                                                   
var_dump($array_by_assignment[0][0]['key']); // bar, still a reference   

array_map Applies the callback to the elements of the given arrays, just like foreach. if the array you want to copy has more than 1 nest, array_map does not work.