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

(PHP 4, PHP 5, PHP 7) Rewind the internal array pointer

(PHP 4, PHP 5, PHP 7) Sort an array in reverse order

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

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

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

(PHP 4, PHP 5, PHP 7) Import variables into the current symbol table from an array

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

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

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