<?php

$time = ['zeroOrMany' => ['sec' => 'секунд',
						  'min' => 'минут',
						  'hour' => 'часоов'
						 ],
		'one' => 		['sec' => 'секунду',
						  'min' => 'минуту',
						  'hour' => 'час'
						 ],
		 'few' => 		['sec' => 'секунды',
						  'min' => 'минуты',
						  'hour' => 'часов'
						 ],
		];

function getSuffix($num, $type ) {
	global $time;
	
	if ($num > 9) {
		$num = $num % 10;
	}
	
	if ($num == 0 || in_array($num, [5,6,7,8,9])) {
		return $time['zeroOrMany'][$type];
	} else if ($num == 1) {
		return $time['one'][$type];
	} else if (in_array($num, [2,3,4])) {
		return $time['few'][$type];
	}	
}

$num = 666;
echo $num.' '.getSuffix($num, 'min');