Home » PHP » PHP_Compat » Bug #6293

[2005-12-19 23:20 UTC] court at idstrom dot com

Description:
------------
PHP_Compat version 1.5

Test script:
---------------
<?

require_once('PHP/Compat/Function/array_intersect_key.php');

print_r(array_intersect_key(
array('a'=>1, 'b'=>2, 'c'=>3, 'd'=>4),
array('a'=>0, 'c'=>0),
array('a'=>0, 'd'=>4)
));

?>

Here's a correct (and slightly faster) implementation that requires php 4 >= 4.0.4 (for call_user_func_array)

function array_intersect_key() {
$args = func_get_args();

$arg_keys = array_map('array_keys', $args);
$result_keys = call_user_func_array('array_intersect', $arg_keys);

$first_arg = $args[0];
$result = array();
foreach($result_keys as $key) {
$result[$key] = $first_arg[$key];
}
return $result;
}
}

Expected result:
----------------
Array
(
[a] => 1
)

Actual result:
--------------
Array
(
[a] => 1
[c] => 3
[d] => 4
)