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ARRAY_UDIFF_ASSOC

Computes the difference of arrays with additional index check, compares data by a callback function

SYNTAX

array_udiff_assoc ( array $array1 , array $array2 [, array $... ], callable $value_compare_func ) : array

PARAMETERS

array1

The first array.

array2

The second array.

value_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.

callback ( mixed $a, mixed $b ) : int

RETURN

array_udiff_assoc() returns an array containing all the values from array1 that are not present in any of the other arguments. Note that the keys are used in the comparison unlike array_diff() and array_udiff(). The comparison of arrays' data is performed by using an user-supplied callback. In this aspect the behaviour is opposite to the behaviour of array_diff_assoc() which uses internal function for comparison.

EXAMPLES

ARRAY1 ARRAY2 VALUE_COMPARE_FUNC

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

...

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

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