PHP实例：两个php日期控制类实例

<?php
class Calendar
{
 var $month;
 var $year;
 
    function __construct($year,$month)
    {
     $this->year=$year;
  $this->month=$month;
 }
 
 function endday()
 {
  $daydate=date("d",mktime(0,0,0,$this->month,35,$this->year));
  $endday=35-$daydate;
  return $endday;
 }
 
 function oneday_week()
 {
  $oneday_week=date("w",mktime(0,0,0,$this->month,1,$this->year));
  return $oneday_week;
 }
 
 function title_link()
 {
  if(!isset($this->month) && !isset($this->year))
  {
   $this->year  = date("Y");
   $this->month = date("m");
        }
  
  $lastmonth=$this->month-1;
  $nextmonth=$this->month+1;
  $lastyear=$this->year;
  $nextyear=$this->year;
 
        if($this->month <= 1)
        {
         $lastmonth=12;
   $nextmonth=$this->month+1;
   $lastyear=$this->year-1;
   $nextyear=$this->year;
  }
        elseif ($this->month >= 12) 
        {
         $lastmonth=$this->month-1;
         $nextmonth=1;
   $lastyear=$this->year;
   $nextyear=$this->year+1;
        }
 
        $str ="<td colspan='2'><div align='center'><a href=$PHP_SELF?year=".$lastyear."&month=".$lastmonth."&><<<</a></div></td>";
  $str.="<td colspan='3'><div align='center'>".$this->year."--".$this->month."</div></td>";
  $str.="<td colspan='2'><div align='center'><a href=$PHP_SELF?year=".$nextyear."&month=".$nextmonth."&>>>></a></div></td>";
  return $str;
 }
 
 function Show_Calendar()
 {
        echo "<table width='181' border=5><tr class='tr.title'>".$this->title_link()."</tr><tr>";
        $weekarray=array("日","一","二","三","四","五","六");
        
        for($k=0;$k<=6;$k++)
        {
         echo "<td><div align='center'>".$weekarray[$k]."</div></td>";
        }
        echo "</tr>";
        
        for($i=0;$i<=5;$i++)
        {
         echo "<tr>";
         for($j=1;$j<=7;$j++)
         {
     $math=( $j - $this->oneday_week() ) + 7 * $i;
    
          echo "<td><div align='center'>";
    
          if($math <= $this->endday() and $math>=1)
     {
   echo $math;
     }
    
         echo "</div></td>";
         }    
         echo "</tr>";     
        }
  echo "</table>";
 }
}
$calendar=new Calendar($_GET['year'],$_GET['month']);
$calendar->month=$_GET['month'];
$calendar->year=$_GET['year'];
$calendar->Show_Calendar();
?>

<?php
header("content-type:text/html;charset=utf-8");
?>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
 
<link href="statics/css/zhaoshang.css" rel="stylesheet" type="text/css">
<div class="rili">
<?php
if(!emptyempty($_GET)){
    $year = isset($_GET['year'])?$_GET['year']:date('y');
    $month = isset($_GET['month'])?$_GET['month']:date('m');
 $day = isset($_GET['day'])?$_GET['day']:date('d');
}
if(emptyempty($year)){
    $year = date('Y');
}
if(emptyempty($month)){
    $month = date('m');
}
 
if(emptyempty($month)){
    $days = date('d');
}
 
$start_weekday = date('w',mktime(0,0,0,$month,1,$year));
//echo $start_weekday;
$days = date('t',mktime(0,0,0,$month,1,$year));
//echo $days;
$week = array('日','一','二','三','四','五','六');
$i = 0;
$k = 1;
$j = 0;
echo '<table >';
echo '<tr><td colspan = 7 style ="text-align:center; width:250px; background:#d5e5f6; border-bottom:1px solid #333366;">'.$year.'年'.$month.'月'.'</td></tr>';
echo '<tr>';
for($i = 0;$i < 7;$i++){
    echo '<td>'.$week[$i].'</td>';
}
echo '</tr>';
echo '<tr>';
for($j = 0;$j < $start_weekday;$j++){
    echo '<td style="color:#f1f8fc;">'.$j.'</td>';
}
while($k <= $days){
    if($k == $day){
        echo '<td style="color:red"><a href="?year='.$year.'&month='.$month.'&day='.$k.'"><span style="color:red">'.$k.'</span></a></td>';
    }else{
        echo '<td><a href="?year='.$year.'&month='.$month.'&day='.$k.'">'.$k.'</a></td>';
    }
    if(($j+1) % 7 == 0){
        echo '</tr><tr>';
    }
    $j++;
    $k++;
}
while($j % 7 != 0){
    echo '<td style="color:#f1f8fc;">'.$j.'</td>';
    $j++;
}
echo '</tr>';
 
echo '<tr style="background:#d5e5f6;">';
echo "<td><a href=?".lastYear($year,$month).">".'<<'.'</a></td>';
echo "<td><a href=?".lastMonth($year,$month).">".'<'.'</a></td>';
echo '<td colspan = 3 style="width:105px;" >';
echo '<form name = "myform" method = "GET">';
echo '<select name = year  class="year">';
for($start_year = 1970;$start_year<2039;$start_year++){
 $selected='';
 if( $year== $start_year ) { $selected='selected'; }
 echo '<option value ='. $start_year.' '.$selected.'>'.$start_year.'</option>'." nt";
}
echo '</select>';
echo '<select name = month class="month">';
for($start_month = 1;$start_month<=12;$start_month++){
 $selected='';
 if( $month== $start_month ) { $selected='selected';}
 echo '<option value = '.$start_month.' '.$selected.'>'.$start_month.'</option>'." nt";
}
echo '</select>';
/*echo '月';*/
/*echo '<input type = "submit" name = "search" value = "查询">';*/
echo '</form>';
echo '</td>';
echo "<td><a href=?".nextYear($year,$month).">".'>>'.'</a></td>';
echo "<td><a href=?".nextMonth($year,$month).">".'>'.'</a></td>';
echo '</tr>';
echo '</table>';
 
function lastYear($year,$month){
 $year = $year-1;
 return "year=$year&month=$month";
}
function lastMonth($year,$month){
 if($month == 1){
  $year = $year -1;
  $month = 12;
 }else{
  $month--;
 }
 return "year=$year&month=$month";
}
function nextYear($year,$month){
 $year = $year+1;
 return "year=$year&month=$month";
}
function nextMonth($year,$month){
 if($month == 12){
  $year = $year +1;
  $month = 1;
 }else {
  $month++;
 }
 return "year=$year&month=$month";
}
 
?>
</div>