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

(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 intersection of arrays with additional index check

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

(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 5 >= 5.5.0, PHP 7) Return the values from a single column in the input array

(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) Prepend one or more elements to the beginning of an array

(PHP 4, PHP 5, PHP 7) Return the current element in an array