echo timeInWords(5, 45)."\n";
echo timeInWords(3, 00)."\n";
echo timeInWords(7, 15)."\n";
echo timeInWords(6, 30)."\n";
echo timeInWords(2, 50)."\n";
echo timeInWords(8, 01)."\n";
echo timeInWords(9, 59)."\n";

function timeInWords($h, $m) {
	$res = (" ");

	if ($m == 00) {
		$res = $h . " o'clock";
	} else if ($m == 30) {
		$res = "Half past " . $h;
	} else if ($m == 15) {
		$res = "Quarter past " . $h;
	} else if ($m == 45) {
		$res = "Quarter to " . $h + 1;
	} else if ($m < 30) {
		$res = $m . " minutes  past " . $h;
	} else {
		$res = 60 - $m . " minutes  to " . $h + 1;
	}
	return $res;
}

function timeInWords_2($h, $m) {
	$res = (' ');

	switch ($m) {
		case '00';
			$res = $h . " o'clock";
			break;
		case '30';
			$res = "Half past " . $h;
			break;
		case '45';
			$res = "Quarter to " . $h + 1;
			break;
		case '15';
			$res = "Quarter past " . $h;
			break;
		case $m < 30;
			$res = $m . " minutes  past " . $h;
			break;
		case $m > 30;
			$res = 60 - $m . " minutes  to " . $h + 1;
			break;
	}
	return $res;
}