php man page for countable

COUNTABLE(3)								 1							      COUNTABLE(3)

The Countable interface

INTRODUCTION
	Classes implementing Countable can be used with the count(3) function.

INTERFACE SYNOPSIS
       Countable

       Countable

       Methods

       o abstractpublic int Countable::count (void  )

PHP Documentation Group 													      COUNTABLE(3)