PHP制作万年历

<?php
/**
?* PHP万年历
?* @author Fly 2012/10/16
?*/
class Calendar{
??? protected $_table;//table表格
??? protected $_currentDate;//当前日期
??? protected $_year;??? //年
??? protected $_month;??? //月
??? protected $_days;??? //给定的月份应有的天数
??? protected $_dayofweek;//给定月份的 1号 是星期几
??? /**
???? * 构造函数
???? */
??? public function __construct()
??? {
??????? $this->_table="";
??????? $this->_year? = isset($_GET["y"])?$_GET["y"]:date("Y");
??????? $this->_month = isset($_GET["m"])?$_GET["m"]:date("m");
??????? if ($this->_month>12){//处理出现月份大于12的情况
??????????? $this->_month=1;
??????????? $this->_year++;
??????? }
??????? if ($this->_month<1){//处理出现月份小于1的情况
??????????? $this->_month=12;
??????????? $this->_year--;
??????? }
??????? $this->_currentDate = $this->_year.'年'.$this->_month.'月份';//当前得到的日期信息
??????? $this->_days?????????? = date("t",mktime(0,$this->_month,1,$this->_year));//得到给定的月份应有的天数
??????? $this->_dayofweek??? = date("w",$this->_year));//得到给定的月份的 1号 是星期几
??? }
??? /**
???? * 输出标题和表头信息
???? */
??? protected function _showTitle()
??? {
??????? $this->_table="<table><thead><tr align='center'><th colspan='7'>".$this->_currentDate."</th></tr></thead>";
??????? $this->_table.="<tbody><tr>";
??????? $this->_table .="<td style='color:red'>星期日</td>";
??????? $this->_table .="<td>星期一</td>";
??????? $this->_table .="<td>星期二</td>";
??????? $this->_table .="<td>星期三</td>";
??????? $this->_table .="<td>星期四</td>";
??????? $this->_table .="<td>星期五</td>";
??????? $this->_table .="<td style='color:red'>星期六</td>";
??????? $this->_table.="</tr>";
??? }
??? /**
???? * 输出日期信息
???? * 根据当前日期输出日期信息
???? */
??? protected function _showDate()
??? {
??????? $nums=$this->_dayofweek+1;
??????? for ($i=1;$i<=$this->_dayofweek;$i++){//输出1号之前的空白日期
??????????? $this->_table.="<td>&nbsp</td>";
??????? }
??????? for ($i=1;$i<=$this->_days;$i++){//输出天数信息
??????????? if ($nums%7==0){//换行处理：7个一行
??????????????? $this->_table.="<td>$i</td></tr><tr>";???
??????????? }else{
??????????????? $this->_table.="<td>$i</td>";
??????????? }
??????????? $nums++;
??????? }
??????? $this->_table.="</tbody></table>";
??????? $this->_table.="<h3><a href='?y=".($this->_year)."&m=".($this->_month-1)."'>上一月</a>???";
??????? $this->_table.="<a href='?y=".($this->_year)."&m=".($this->_month+1)."'>下一月</a></h3>";
??? }
??? /**
???? * 输出日历
???? */
??? public function showCalendar()
??? {
??????? $this->_showTitle();
??????? $this->_showDate();
??????? echo $this->_table;
??? }
}
$calc=new Calendar();
$calc->showCalendar();