array_diff_assoc
(PHP 4 >= 4.3.0, PHP 5)
array_diff_assoc — Computes the difference of arrays with additional index check
Descrierea
Compares array1 against array2 and returns the difference. Unlike array_diff() the array keys are used in the comparision.
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 values from array1 that are not present in any of the other arrays.
Exemple
Example#1 array_diff_assoc() example
In this example you see the "a" => "green" pair is present in both arrays and thus it is not in the ouput from the function. Unlike this, the pair 0 => "red" is in the ouput because in the second argument "red" has key which is 1.
<?php
$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
$array2 = array("a" => "green", "yellow", "red");
$result = array_diff_assoc($array1, $array2);
print_r($result);
?>
Exemplul de mai sus va afiÅŸa:
Array ( [b] => brown [c] => blue [0] => red )
Example#2 array_diff_assoc() example
Two values from key => value pairs are considered equal only if (string) $elem1 === (string) $elem2 . In other words a strict check takes place so the string representations must be the same.
<?php
$array1 = array(0, 1, 2);
$array2 = array("00", "01", "2");
$result = array_diff_assoc($array1, $array2);
print_r($result);
?>
Exemplul de mai sus va afiÅŸa:
Array ( [0] => 0 [1] => 1 )
Note
Notă: This function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using, for example, array_diff_assoc($array1[0], $array2[0]);.