PeriodicTimer

Calls callback in specified time interval(default 1 sec)

Open source code

Methods Summary
`public static`	# `every( int $interval )` Sets calls time interval
`public`	# `call( callable $callback )`
`public`	# `update( int $now )` Updates that timer if is after next call its calls callback.
`public`	# `callNow( )` Calls callback of that timer
`public`	# `getInterval( )`
`public`	# `getCallback( )`