<style>

    table {

        border:1px solid #;

    }

    .fontb {

        color:white;

        background:blue;

    }

    th {

        width:30px;

    }

    td,th {

        height:30px;

        text-align:center;

    }

    form {

        margin:0px;

        padding:0px;

    }

</style>

<?php

    include "calendar.class.php";

    $calendar=new Calendar;

    $calendar->out();

<?php

class Calendar {

        private $year; //当前的年

        private $month; //当前的月

        private $start_weekday; //当月的第一天对应的是周几

        private $days; //当前月一共多少天

        function __construct(){

            $this->year=isset($_GET["year"]) ? $_GET["year"] : date("Y");

            $this->month=isset($_GET["month"]) ? $_GET["month"] : date("m");

            $this->start_weekday=date("w", mktime(, , , $this->month, , $this->year));

            $this->days=date("t", mktime(, , , $this->month, , $this->year));

        }

        function out(){

            echo '<table align="center">';

            $this->chageDate("test.php");

            $this->weeksList();

            $this->daysList();

            echo '</table>';

        }

        private function weeksList(){

            $week=array('日','一','二','三','四','五','六');

            echo '<tr>';

            for($i=; $i<count($week); $i++)

                echo '<th class="fontb">'.$week[$i].'</th>';

            echo '</tr>';

        }

        private function daysList(){

            echo '<tr>';

            //输出空格(当前一月第一天前面要空出来)

            for($j=; $j<$this->start_weekday; $j++)

                echo '<td>&nbsp;</td>';

            for($k=; $k<=$this->days; $k++){

                $j++;

                if($k==date('d'))

                    echo '<td class="fontb">'.$k.'</td>';

                else

                    echo '<td>'.$k.'</td>';

                if($j%==)

                    echo '</tr><tr>';

            }

            //后面几个空格

            while($j%!==){

                echo '<td>&nbsp;</td>';

                $j++;

            }

            echo '</tr>';

        }

        private function prevYear($year, $month){

            $year=$year-;

            if($year < )

                $year = ;

            return "year={$year}&month={$month}";

        }

        private function prevMonth($year, $month){

            if($month == ) {

                $year = $year -;

                if($year < )

                    $year = ;

                $month=;

            }else{

                $month--;

            }

            return "year={$year}&month={$month}";

        }

        private function nextYear($year, $month){

            $year = $year + ;

            if($year > )

                $year = ;

            return "year={$year}&month={$month}";

        }

        private function nextMonth($year, $month){

            if($month==){

                $year++;

                if($year > )

                    $year=;

                $month=;

            }else{

                $month++;

            }

            return "year={$year}&month={$month}";

        }

        private function chageDate($url=""){

            echo '<tr>';

            echo '<td><a href="?'.$this->prevYear($this->year, $this->month).'">'.'<<'.'</a></td>';

            echo '<td><a href="?'.$this->prevMonth($this->year, $this->month).'">'.'<'.'</a></td>';

            echo '<td colspan="3">';

            echo '<form>';

            echo '<select name="year" onchange="window.location=\''.$url.'?year=\'+this.options[selectedIndex].value+\'&month='.$this->month.'\'">';

            for($sy=; $sy <= ; $sy++){

                $selected = ($sy==$this->year) ? "selected" : "";

                echo '<option '.$selected.' value="'.$sy.'">'.$sy.'</option>';

            }

            echo '</select>';

            echo '<select name="month"  onchange="window.location=\''.$url.'?year='.$this->year.'&month=\'+this.options[selectedIndex].value">';

            for($sm=; $sm<=; $sm++){

                $selected1 = ($sm==$this->month) ? "selected" : "";

                echo '<option '.$selected1.' value="'.$sm.'">'.$sm.'</option>';

            }

            echo '</select>';

            echo '</form>';

            echo '</td>';

            echo '<td><a href="?'.$this->nextYear($this->year, $this->month).'">'.'>>'.'</a></td>';

            echo '<td><a href="?'.$this->nextMonth($this->year, $this->month).'">'.'>'.'</a></td>';

            echo '</tr>';

        }

    }