php 实现日历

转自： http://blog.chinaunix.net/uid-23781137-id-2985238.html

<?php class Calendar{var $YEAR,$MONTH,$DAY;var $COLOR_TODAY = "lightgray"; //当前日期的背景色var $COLOR_THIS_MONTH = "lightgray"; //当前月的背景色var $COLOR_THIS_YEAR = "lightgray"; //当前年的背景色var $NUMS_YEAR = 1; //年份下拉表里可以显示的年份数目var $WEEK=array("星期日","星期一","星期二","星期三","星期四","星期五","星期六"); var $_MONTH=array( "01"=>"一月", "02"=>"二月", "03"=>"三月", "04"=>"四月", "05"=>"五月", "06"=>"六月", "07"=>"七月", "08"=>"八月", "09"=>"九月", "10"=>"十月", "11"=>"十一月", "12"=>"十二月");function setYear($year){     $this->YEAR=$year; } //获得年份 function getYear(){     return $this->YEAR; } //设置月份 function setMonth($month){     $this->MONTH=$month; } //获得月份 function getMonth(){     return $this->MONTH; } //设置日期 function setDay($day){     $this->DAY=$day; } //获得日期 function getDay(){     return $this->DAY; } //获得方法内指定的日期的星期数 0（表示星期天）到 6（表示星期六）function getWeek($year,$month,$day){        $week=date("w",mktime(0,0,0,$month,$day,$year));//获得星期        return $week;//获得星期        } //为$YEAR,$MONTH,$DAY赋值function _env(){     if(isset($_POST['month'])){//有指定月         $month=$_POST['month'];         }else{             $month=date("m");//默认为本月         }         if(isset($_POST['year'])){//有指年             $year=$_POST['year'];         }else{             $year=date("Y");//默认为本年         }     $this->setYear($year);     $this->setMonth($month);     $this->setDay(date("d"));     }//打印日历 function out(){     $this->_env();     $week=$this->getWeek($this->YEAR,$this->MONTH,$this->DAY);//获得日期为星期几 （例如今天为2011-10-31，星期一）     $fweek=$this->getWeek($this->YEAR,$this->MONTH,1);//获得此月第一天为星期几     //echo "<div style=\"align:center;margin:0;border:1 solid black;font:9pt\"><table border=1 solid align=center><tr><td colspan='7'>    echo "<table border=1 solid align=center><tr><td colspan='7'>     <form action=$_SERVER[PHP_SELF] method=\"post\" style=\"margin:0\">     月份：<select name=\"month\" onchange=\"this.form.submit();\">";     for($ttmpa=1;$ttmpa<13;$ttmpa++){//打印12个月         $ttmpb=sprintf("%02d",$ttmpa);             if(strcmp($ttmpb,$this->MONTH)==0){                 $select="selected style=\"background-color:$this->COLOR_THIS_MONTH\"";             }else{                 $select="";             }            echo "<option value=\"$ttmpb\" $select>".$this->_MONTH[$ttmpb]."</option>";         }        echo "</select> 年份：<select name=\"year\" onchange=\"this.form.submit();\">";//打印年份        for($ctmpa=$this->YEAR-$this->NUMS_YEAR;$ctmpa<=$this->YEAR+$this->NUMS_YEAR;$ctmpa++){         if($ctmpa>2037){                 break;             }         if($ctmpa<1970){             continue;             }         if(strcmp($ctmpa,$this->YEAR)==0){             $select="selected style=\"background-color:$this->COLOR_THIS_YEAR\"";         }else{             $select="";             }             echo "<option value=\"$ctmpa\" $select>$ctmpa</option>";             }             echo "</select>             </form></td></tr><tr>";         for($Tmpa=0;$Tmpa<count($this->WEEK);$Tmpa++){//打印星期标头             echo "<td>".$this->WEEK[$Tmpa]."</td>";         }             echo "</tr><tr>";            for($Tmpc=0;$Tmpc<$fweek;$Tmpc++){                     echo "<td></td>";                 }          for($Tmpb=1;$Tmpb<=date("t",mktime(0,0,0,$this->MONTH,$this->DAY,$this->YEAR));$Tmpb++){//打印所有日期            $Tmpb=sprintf("%02d",$Tmpb);             if((strcmp($Tmpb,$this->DAY)==0) && ($this->MONTH == date("m")) && ($this->YEAR == date("Y")) ){//获得当前日期，做标记                $flag=" bgcolor='$this->COLOR_TODAY'";            }else{                 $flag=" bgcolor='white'";            }            if((strcmp($this->getWeek($this->YEAR,$this->MONTH,$Tmpb),0)==0) && (1==$Tmpb)){ //第一天是星期日则不用加<tr>                echo "<tr><td align=center $flag>$Tmpb</td>"; //星期日则换行，添加行首            }else if(strcmp($this->getWeek($this->YEAR,$this->MONTH,$Tmpb),0)==0){                 echo "<tr><td align=center $flag>$Tmpb</td>"; //星期日则换行，添加行首            }else if(strcmp($this->getWeek($this->YEAR,$this->MONTH,$Tmpb),6)==0){                echo "<td align=center $flag>$Tmpb</td></tr>";//星期六为行尾            }else{                 echo "<td align=center $flag>$Tmpb</td>";             }             }//for($Tmpb=1;$Tmpb<=date("t",mktime(0,0,0,$this->MONTH,$this->DAY,$this->YEAR));$Tmpb++)    //最后一天是星期六不用再加</tr>    if(strcmp($this->getWeek($this->YEAR,$this->MONTH,date("t",mktime(0,0,0,$this->MONTH,$this->DAY,$this->YEAR))),6)==0)        echo "</table>";    else        echo "</tr></table>"; }//out();}//class Calendar$d = new Calendar();$d->out();?>