PHP array_udiff_assoc function

Last Updated: February 15, 2022

array_udiff_assoc — Compute the difference of arrays using keys and values. Use call back function to compare values

Syntax

array_udiff_assoc(array $array, array ...$arrays, callable $value_compare_func): array

Supports (PHP 5, PHP 7, PHP 8)

Parameters

Parameter Description
array first array
arrays arrays to compare against
value_compare_func callback function

Return Value

array_udiff_assoc() returns an array containing all the values from array that are not present in any of the other arguments

Example

function myfunction($a,$b)
{
    if ($a===$b)
    {
        return 0;
    }
    return ($a>$b)?1:-1;
}

$a1=array("a"=>"one","b"=>"two","c"=>"three");
$a2=array("a"=>"one","b"=>"three","c"=>"four");

$result=array_udiff_assoc($a1,$a2,"myfunction");
print_r($result);

Output

Array ( [b] => two [c] => three )
Test