(PHP 4 >= 4.0.1, PHP 5, PHP 7) Computes the difference of arrays

(PHP 4, PHP 5, PHP 7) Assign variables as if they were an array

(PHP 4, PHP 5, PHP 7) Create an array array array

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Applies the callback to the elements of the given arrays

(PHP 5 >= 5.1.0, PHP 7) Calculate the product of values in an array

(PHP 5 >= 5.1.0, PHP 7) Computes the intersection of arrays using keys for comparison

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Computes the intersection of arrays

(PHP 4, PHP 5, PHP 7) Extract a slice of the array

(PHP 5, PHP 7) Creates an array by using one array for keys and another for its values

(PHP 4, PHP 5, PHP 7) Sort an array by values using a user-defined comparison function