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

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

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

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

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

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

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

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

(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 difference of arrays using keys for comparison