array_udiff()

array_udiff - Computes the difference of arrays by using a callback function for data comparison

Syntax

array array_udiff (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 by using a callback function for data comparison. This is unlike array_diff() which uses an internal function for comparing the data.

Version

PHP 5

Return value

Returns an array containing all the values of array1 that are not present in any of the other arguments.