(PHP 5, PHP 7) Computes the intersection of arrays with additional index check, compares data and indexes by

(PHP 4 >= 4.0.5, PHP 5, PHP 7) Iteratively reduce the array to a single value using a callback function

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

(PHP 4, PHP 5, PHP 7) Sort an array using a "natural order" algorithm

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

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

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Filters elements of an array using a callback function

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

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

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