<?php

function percentage_deadband($value,$previous,$deadband)
{
	if($previous==0 || $value==0)
	{
		return false;
	}
	$n = $value / $previous * 100;
	if($n > 100){
	    return $n - $deadband > 100;
	}
	if($n < 100){
	    return 100 - $n > $deadband;
	}
	if($n == 100){
	    return false;
	}
	return false;
}


function numeric_deadband($value,$previous,$deadband)
{
	if($previous==0 || $value==0 || $previous == $value)
	{
		return false;
	}
	if($previous > $value){
		return $previous - $deadband > $value;
	}else{
		return $value - $previous > $deadband;
	}
	return false;
}