The array_diff_assoc Function
The array_diff_assoc function compares arrays and returns elements from the first array that are not present in the subsequent arrays, taking into account both keys and values. It uses strict comparison (===) for the comparison.
Syntax
array_diff_assoc(array $array1, array $array2, array ...$arrays): array
Example
Let's compare two arrays with different keys and values:
<?php
$arr1 = ['a' => 1, 'b' => 2, 'c' => 3];
$arr2 = ['a' => 1, 'b' => 5, 'd' => 4];
$res = array_diff_assoc($arr1, $arr2);
print_r($res);
?>
Code execution result:
['b' => 2, 'c' => 3]
Example
Comparison of three arrays with numeric keys:
<?php
$arr1 = [1, 2, 3, 4];
$arr2 = [1, 3, 3, 4];
$arr3 = [1, 2, 3, 5];
$res = array_diff_assoc($arr1, $arr2, $arr3);
print_r($res);
?>
Code execution result:
[1 => 2]
Example
Comparison with different data types:
<?php
$arr1 = ['a' => '1', 'b' => 2];
$arr2 = ['a' => 1, 'b' => '2'];
$res = array_diff_assoc($arr1, $arr2);
print_r($res);
?>
Code execution result:
['a' => '1', 'b' => 2]
See Also
-
the
array_difffunction,
which compares arrays by values without taking keys into account -
the
array_intersect_assocfunction,
which finds the intersection of arrays with keys taken into account
