array_udiff_assoc()

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

Syntax

array array_udiff_assoc (array $array1, array $array2, array $ ..., callback $data_compare_func)

Arguments

• array1 - The first array.
• array2 - The second array.
• ... - The callback comparison function. The user supplied callback function is used for comparison. It 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.
• data_compare_func

Description

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

Version

PHP 5

Return value

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.