<?php

function ght($ts,$fa=null,$sd=2,$bunit='years',$ozero=false) {
/*
$ts is seconds (can be float)
if not null, $fa has to be an array defining the output suffixes, see below its default ;-)
$sd is how many decimals to put after a dot after seconds (can be 0)
$bunit is "from which unit to start counting"
$ozero is whether to include a zero value for a unit
*/
	$bunits=['years', 'weeks', 'days', 'hours', 'minutes', 'seconds'];
	$cbunits=count($bunits);
	$obunit=$bunit;
	$bunit=array_search($bunit,$bunits,true);
	if ($bunit===false) {
		fwrite(STDERR,"Function «ght» was called with an unsupported «bunit» value: «{$obunit}».\n");
		$bunit=0;
	}
	$buniti=abs($bunit-$cbunits);
	if ($fa==null) $fa=['year','years','week','weeks','day','days','hour','hours','minute','minutes','second','seconds'];
	$sep=', ';
	$out='';
	$i=0;
	$osep='';
// years
	if ($buniti>=6) {
		$x=floor($ts/31536000);
		if ($x>0 || $ozero)
			($x==1) ? $out.=$x.' '.$fa[$i] : $out.=$x.' '.$fa[$i+1];
		$ts=$ts-$x*31536000;
	}
	$i+=2;
// weeks
	if ($buniti>=5) {
		if ($out!='') $osep=$sep;
		$x=floor($ts/604800);
		if ($x>0 || $ozero)
			($x==1) ? $out.=$osep.$x.' '.$fa[$i] : $out.=$osep.$x.' '.$fa[$i+1];
		$ts=$ts-$x*604800;
	}
	$i+=2;
// days
	if ($buniti>=4) {
		if ($out!='') $osep=$sep;
		$x=floor($ts/86400);
		if ($x>0 || $ozero)
			($x==1) ? $out.=$osep.$x.' '.$fa[$i] : $out.=$osep.$x.' '.$fa[$i+1];
		$ts=$ts-$x*86400;
	}
	$i+=2;
// hours
	if ($buniti>=3) {
		if ($out!='') $osep=$sep;
		$x=floor($ts/3600);
		if ($x>0 || $ozero)
			($x==1) ? $out.=$osep.$x.' '.$fa[$i] : $out.=$osep.$x.' '.$fa[$i+1];
		$ts=$ts-$x*3600;
	}
	$i+=2;
// minutes
	if ($buniti>=2) {
		if ($out!='') $osep=$sep;
		$x=floor($ts/60);
		if ($x>0 || $ozero)
			($x==1) ? $out.=$osep.$x.' '.$fa[$i] : $out.=$osep.$x.' '.$fa[$i+1];
		$ts=$ts-$x*60;
	}
	$i+=2;
// seconds
	if ($buniti>=1) {
		if ($out!='') $osep=$sep;
		$x=round($ts,$sd);
		($x==1) ? $out.=$osep.$x.' '.$fa[$i] : $out.=$osep.$x.' '.$fa[$i+1];
	}
	return $out;
}

?>