(PHP 5)array_uintersect -- Computes the intersection of arrays, compares data by a callback function
array_uintersect() returns an array containing all the values of array1 that are present in all the arguments. The data is compared by using a callback function.
Example 1. array_uintersect() example
The above example will output:
For comparison is used the user supplied callback function. 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.