PHP时间类完整实例(非常实用)

本文实例讲述了PHP时间类。分享给大家供大家参考，具体如下：

    <?php
    header("Content-type:text/html;Charset=utf-8");
    class time{
     private $year;//年
     private $month;//月
     private $day;//天
     private $hour;//小时
     private $minute;//分钟
     private $second;//秒
     private $microtime;//毫秒
     private $weekday;//星期
     private $longDate;//完整的时间格式
     private $diffTime;//两个时间的差值
     //返回年份 time：时间格式为时间戳  2013-3-27
     function getyear($time="",$type=""){
     if($time==""){
      $time=time();
     }
     if($type==1){
      return $this->year=date("y",$time); //返回两位的年份 13
     }else{
      return $this->year=date("Y",$time); //返回四位的年份 2013
     }
     }
     //返回当前时间的月份 time：时间格式为时间戳 2013-3-27
     function getmonth($time="",$type=""){
     if($time==""){
      $time=time();
     }
     switch($type){
      case 1:$this->month=date("n",$time);//返回格式 3
       break;
      case 2:$this->month=date("m",$time);//返回格式 03
       break;
      case 3:$this->month=date("M",$time);//返回格式 Mar
       break;
      case 4:$this->month=date("F",$time);//返回格式 March
       break;
      default:$this->month=date("n",$time);
     }
     return $this->month; 
     }
     //返回当前时间的天数 time：时间格式为时间戳 2013-3-4 
     function getday($time="",$type=""){
     if($time==""){
      $time=time();
     }
     if($type==1){
      $this->day=date("d",$time);//返回格式 04
     }else{
      $this->day=date("j",$time);//返回格式 4
     }
     return $this->day;
     }
     //返回当前时间的小时  2010-11-10 1:19:21 20:19:21 
     function gethour($time="",$type=""){
     if($time==""){
      $time=time();
     } 
     switch($type){
      case 1:$this->hour=date("H",$time);//格式： 1 20
       break;
      case 2:$this->hour=date("h",$time);//格式  01 08
       break;
      case 3:$this->hour=date("G",$time);//格式  1 20
       break;
      case 4:$this->hour=date("g",$time);//格式  1 8
       break; 
      default :$this->hour=date("H",$time);
     }
     return $this->hour;
     }
     //返回当前时间的分钟数 1:9:18  
     function getminute($time="",$type=""){
     if($time==""){
      $time=time();
     }
     $this->minute=date("i",$time); //格式  09
     return $this->minute;
     }
     //返回当前时间的秒数  20:19:01
     function getsecond($time="",$type=""){
     if($time==""){
      $time=time();
     }
     $this->second=date("s",$time); //格式  01
     return $this->second;
     }
     //返回当前时间的星期数 
     function getweekday($time="",$type=""){
     if($time==""){
      $time=time(); 
     }
     if($type==1){
      $this->weekday=date("D",$time);//格式  Sun
     }else if($type==2){
      $this->weekday=date("l",$time); //格式 Sunday
     }else{
      $this->weekday=date("w",$time);//格式 数字表示 0--6
     }
     return $this->weekday;
     }
     //比较两个时间的大小 格式 2013-3-4 8:4:3  
     function compare($time1,$time2){
     $time1=strtotime($time1);
     $time2=strtotime($time2);
     if($time1>=$time2){  //第一个时间大于等于第二个时间 返回1 否则返回0
      return 1;
     }else{
      return -1;
     }
     }
     //比较两个时间的差值
     function diffdate($time1="",$time2=""){
     //echo $time1.'------'.$time2.'<br>';
     if($time1==""){
      $time1=date("Y-m-d H:i:s"); 
     }
     if($time2==""){ 
      $time2=date("Y-m-d H:i:s"); 
     }
     $date1=strtotime($time1);
     $date2=strtotime($time2);
     if($date1>$date2){
      $diff=$date1-$date2; 
     }else{
      $diff=$date2-$date1;
     }
     if($diff>=0){
      $day=floor($diff/86400);
      $hour=floor(($diff%86400)/3600);
      $minute=floor(($diff%3600)/60);
      $second=floor(($diff%60));
      $this->diffTime='相差'.$day.'天'.$hour.'小时'.$minute.'分钟'.$second.'秒'; 
     }
     return $this->diffTime;
     }
     //返回 X年X月X日
     function buildDate($time="",$type=""){
     if($type==1){   
      $this->longDate = $this->getyear($time) . '年' . $this->getmonth($time) . '月' . $this->getday($time) . '日';  
     }else{
      $this->longDate = $this->getyear($time) . '年' . $this->getmonth($time) . '月' . $this->getday($time) . '日'.$this->gethour($time).':'.$this->getminute($time).':'.$this->getsecond($time);  
     }
     return $this->longDate;  
     }
    }
    ?>

希望本文所述对大家PHP程序设计有所帮助。