array_intersect_key
Description
Computes the intersection of arrays using keys for comparison
Syntax
array_intersect_key ( array $array1 , array $array2 [, array $... ] ) : array
Parameters
array1The array with master values to check.
array2An array to compare values against.
...A variable list of arrays to compare.
Return
Returns an associative array containing all the entries of array1 which have keys that are present in all arguments.
Examples
1 · array1 array2
<?
$array1 = array("a" => 0, "b" => 1, "c" => 2, "d" => 3);
$array2 = array("a" => 0, "b" => 4, "e" => 2, "f" => 5);
$return = array_intersect_key($array1, $array2);
print_r($return);
?>Array
(
[a] => 0
[b] => 1
)
2 · ...
<?
$array1 = array("a" => 0, "b" => 1, "c" => 2, "d" => 3);
$array2 = array("a" => 0, "b" => 4, "e" => 2, "f" => 5);
$array3 = array("a" => 0, "b" => 4, "e" => 2, "f" => 5);
$return = array_intersect_key($array1, $array2, $array3);
print_r($return);
?>Array
(
[a] => 0
[b] => 1
)
