(PHP 5 >= 5.2.0, PHP 7) Fill an array with values, specifying keys

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Computes the difference of arrays with additional index check

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Split an array into chunks

(PHP 4, PHP 5, PHP 7) Shift an element off the beginning of array

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Calculate the sum of values in an array

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Removes duplicate values from an array

(PHP 4, PHP 5, PHP 7) Count all elements in an array, or something in an object

(PHP 4 >= 4.0.5, PHP 5, PHP 7) Searches the array for a given value and returns the corresponding key if

(PHP 4, PHP 5, PHP 7) Return the current key and value pair from an array and advance the array cursor

(PHP 4, PHP 5, PHP 7) Prepend one or more elements to the beginning of an array