php实现显示网站运行时间-秒转换年月日时分秒

<?php
// 设置时区
date_default_timezone_set('Asia/Shanghai');
/**
 * 秒转时间，格式 年 月 日 时 分 秒
 * 
 * @author wangyupeng129@126.com
 * @param int $time
 * @return array|boolean
 */
function Sec2Time($time){
	if(is_numeric($time)){
		$value = array(
				"years" => 0, "days" => 0, "hours" => 0,
				"minutes" => 0, "seconds" => 0,
		);
		if($time >= 31556926){
			$value["years"] = floor($time/31556926);
			$time = ($time%31556926);
		}
		if($time >= 86400){
			$value["days"] = floor($time/86400);
			$time = ($time%86400);
		}
		if($time >= 3600){
			$value["hours"] = floor($time/3600);
			$time = ($time%3600);
		}
		if($time >= 60){
			$value["minutes"] = floor($time/60);
			$time = ($time%60);
		}
		$value["seconds"] = floor($time);
		return (array) $value;
	}else{
		return (bool) FALSE;
	}
}

// 本站创建的时间
$site_create_time = strtotime('2013-05-22 00:00:00');
$time = time() - $site_create_time;
$uptime = Sec2Time($time);
?>

本站运行：<span style="color:red;"><?php echo $uptime['years']; ?>年<?php echo $uptime['days']; ?>天<?php echo $uptime['hours']; ?>小时<?php echo $uptime['minutes']; ?>分<?php echo $uptime['seconds']; ?>秒</span>