php月历类

<meta charset="utf-8">
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript">
<!--
$(function (){
   $(".subMenu").hide()
   $(".menu>td>a").mouseover(function () {
      $(".subMenu").stop(true,true).hide(0);
      $(this).parent().find("div.subMenu").slideDown("slow");
      $(this).parent().addClass("mainHover")
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   $(".menu>td").hover(function () {},function () {$(this).find("div.subMenu").hide();
        $(this).removeClass("mainHover")
      }
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<style type="text/css">
<!--
#Layer1 {
   position:absolute;
   z-index:1;
        display:none; 
        width:100px; 
        height:100px; 
        background: #ccc;
        border:1px solid #ccc;
        padding: 10px;
        font-size: 14px;
        color: red;
        font-weight: bold;
}
a{
    display: block;
    width: 50px;
    height: 100%;
    text-decoration: none;
}
a:hover{
    text-decoration:underline;
}
-->
</style>
<?php 
class calendar{
    private $_BiaoJi=1;
    private $_CurrMon;//当前月
    private $_MonNum;//每月天数
    private $_WeekNum;//星期
    private $_url;//连接;
    private $_FirstDay;//每月的第一天
    private $_LastDay;//每月的最后一天
    private $_MonWeekSum;//每月有几个周
    //构造方法赋值
    function __construct() {
        $this->_CurrMon=  isset($_GET['mon'])?$_GET['mon']:  date('n');
        $this->_MonNum=array(31,30,31,30,31,30,31,31,30,31,30,31);
        $this->_WeekNum=array('日','一','二','三','四','五','六');
        $this->_url=  $this->GetUrl();
        $this->_FirstDay=  getdate(mktime(0,0,0,  $this->_CurrMon,1,  date('Y')));
        $this->Two();
        $this->_LastDay=  $this->_MonNum[$this->_CurrMon-1];
        $this->_MonWeekSum=  $this->MonWeekSum();   
    }
    //返回连接
    private function GetUrl(){
        $_url=$_SERVER['REQUEST_URI'];
        $_arr=  parse_url($_url);
        parse_str($_arr['query'],$_QueryArr);
        unset($_QueryArr['mon']);
        $_str=  http_build_query($_QueryArr);
        return $_arr['path'].'?'.$_str.'&mon=';
    }
    //返回二月份天数
    private function Two(){
        if(date('L')){
            return $this->_MonNum[1]=29;
        }else{
            return $this->_MonNum[1]=28;
        }
    }
    //返回每月的星期数
    private function MonWeekSum(){
        return ceil(($this->_LastDay+$this->_FirstDay['wday'])/7);
    }
    //上月
    private function PreMon(){
        if($this->_CurrMon>1){
            return "<a href='".$this->_url.($this->_CurrMon-1)."' style='float:left; margin-left:15%;'><<</a>";
        }
    }
    private function NextMon(){
        if($this->_CurrMon<12){
            return "<a href='".$this->_url.($this->_CurrMon+1)."' style='float:right; margin-right:15%;'>>></a>";
        }
    }
    //月历
    private function Mon(){
        echo "<table border='1' align='center' width='400'>";
        echo "<tr><td colspan='7' align='center'>".$this->PreMon().' '.date("Y").' 年 '.$this->_CurrMon.' 月 月历 '.$this->NextMon()."</td></tr>";
        echo "<tr align='center'>";
            foreach ($this->_WeekNum as $_arr1){
                echo "<td>{$_arr1}</td>";
            }
        echo "</tr>";
        for($i=0;$i<$this->_MonWeekSum;$i++){
            echo "<tr align='center' class='menu'>";
            for($j=0;$j<7;$j++){
                if($this->_FirstDay['wday']>0 || $this->_BiaoJi>$this->_LastDay){
                    echo "<td>&nbsp</td>";
                    $this->_FirstDay['wday']--;
                }else{
                    if($this->_BiaoJi==date('j')){
                      echo "<td style='background:red;'><a href='#'>{$this->_BiaoJi}</a><div id='Layer1' class='subMenu'>阳历".$this->_CurrMon."月".$this->_BiaoJi."号"."</div></td>";  
                    }else{
                      echo "<td><a href='#'>{$this->_BiaoJi}</a><div id='Layer1' class='subMenu'>阳历".$this->_CurrMon."月".$this->_BiaoJi."号"."</div></td>";
                    }
                    $this->_BiaoJi++;
                }
            }
            echo "</tr>";
        }
        echo "</table>";
    }
    public function show(){
        if($this->_CurrMon>0 && $this->_CurrMon<=12){
            $this->Mon();
        }else{
            echo '非法操作';
        }
    }
}
$_calendar=new calendar();
$_calendar->show();
?>