/**
     * 将秒数转换为时间（年、天、小时、分、秒）
     * @param string $time 时间戳/y-m-d格式时间
     * @return mixed
     */
    public static function sec2Time($time){
        if (!is_numeric($time)) $time = strtotime($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);
        $res['time'] =$value["years"] ."年". $value["days"] ."天"." ". $value["hours"] ."小时". $value["minutes"] ."分".$value["seconds"]."秒";
        $res['value'] = $value;
        Return $res;
    }

使用示例：

public function test()
{
       print_r(ClassName::sec2Time(time()));    //当前时间
}

文中的ClassName请替换为自己的文件类名