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

(PHP 5, PHP 7) Gets extension info public ReflectionExtension

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Dumps a string representation of an internal zend value to output

(PHP 4 >= 4.0.3, PHP 5, PHP 7) Register a function for execution on each tick

(PHP >= 5.4.0) Returns whether this extension is temporary

(PHP 4, PHP 5, PHP 7) Return an array with elements in reverse order

(PHP 5 >= 5.5.0, PHP 7) Get the boolean value of a variable

(PHP 4, PHP 5, PHP 7) Sort an array bool sort

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Finds whether a variable is NULL

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