ternarybit

	/*
	time_delta() returns the difference between two times
	expressed in many ways.

	(mixed) $start:		The initial time to calculate from
	(mixed) $target:	The time in the past or future to calculate the difference between
	(int) $precision:
		0: Generic 	- ex. "About 7 hours ago"
		1: Approximate 	- ex. "7 hours, 15 minutes ago"
		2: Exact	- ex. "7 hours, 15 minutes and 6 seconds ago"