array_diff_key

(PHP 5 >= 5.1.0)

array_diff_key — Computes the difference of arrays using keys for comparison

Descrierea

array array_diff_key ( array $array1 , array $array2 [, array $... ] )

Compares the keys from array1 against the keys from array2 and returns the difference. This function is like array_diff() except the comparison is done on the keys instead of the values.

Parametri

array1: The array to compare from
array2: An array to compare against
...: More arrays to compare against

Valorile întroarse

Returns an array containing all the entries from array1 that are not present in any of the other arrays.

Exemple

Example#1 array_diff_key() example

The two keys from the key => value pairs are considered equal only if (string) $key1 === (string) $key2 . In other words a strict type check is executed so the string representation must be the same.


<?php
$array1 = array('blue'  => 1, 'red'  => 2, 'green'  => 3, 'purple' => 4);
$array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan'   => 8);

var_dump(array_diff_key($array1, $array2));
?>

Exemplul de mai sus va afişa:

array(2) {
  ["red"]=>
  int(2)
  ["purple"]=>
  int(4)
}

Note

Notă: This function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using array_diff_key($array1[0], $array2[0]);.

Vedeţi de asemenea