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array_diff_uassoc

Description

The array_diff_uassoc of Array for PHP computes the difference of arrays with additional index check which is performed by a user supplied callback function.

Syntax

array_diff_uassoc ( array $array1 , array $array2 [, array $... ], callable $key_compare_func ) : array

Parameters

array1

The array to compare from

array2

An array to compare against

...

More arrays to compare against

key_compare_func

The comparison function must return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second.

Return

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

Examples

1 · array1 array2 key_compare_func

<?

function myfunction($key1, $key2) {
    if ($key1 == $key2)
        return 0;
    else if ($key1 > $key2)
        return 1;
    else
        return -1;
}

$array1 = array("a" => 0, "b" => 1, "c" => 2, "d" => 3);
$array2 = array("a" => 0, "b" => 4, "e" => 2, "f" => 5);
$key_compare_func = "myfunction";

$return = array_diff_uassoc($array1, $array2, $key_compare_func);

print_r($return);

?>
Array
(
    [b] => 1
    [c] => 2
    [d] => 3
)

2 · ...

<?

function myfunction($key1, $key2) {
    if ($key1 == $key2)
        return 0;
    else if ($key1 > $key2)
        return 1;
    else
        return -1;
}

$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);
$key_compare_func = "myfunction";

$return = array_diff_uassoc($array1, $array2, $array3, $key_compare_func);

print_r($return);

?>
Array
(
    [b] => 1
    [c] => 2
    [d] => 3
)
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