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

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

(PHP 4, PHP 5, PHP 7) Counts all the values of an array

(PHP 4, PHP 5, PHP 7) Exchanges all keys with their associated values in an array

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

(PHP 4, PHP 5, PHP 7) Shuffle an array bool shuffle

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

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Merge two or more arrays recursively

(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) Sort an array by keys using a user-defined comparison function