<?php
function calctime($aantal_seconden){
	if(!is_numeric($aantal_seconden)){
		return;
	}
	$sec = $aantal_seconden;
	$minuten = 0;
	$uren = 0;
	while($sec>=3600){
		$uren++;
		$sec-=3600;
	}
	while($sec>=60){
		$minuten++;
		$sec-=60;
	}
	if(strlen($sec)==1){
		$sec= '0'.$sec;
	}
	if($uren>0and(strlen($minuten)==1)){
		$minuten = '0'.$minuten;
	}
	if($uren>0){
		$tijd = $uren.':'.$minuten.':'.$sec.' uur';
	}
	elseif($uren==0and($minuten>0)){
		$tijd = $minuten.':'.$sec.' minuten';
	}
	return $tijd;
}
?>