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

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

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

(PHP 4, PHP 5, PHP 7) Fetch a key from an array

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

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

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

(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) Sort an array bool sort

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