PHP实现的简单日历代码

//calendar.php

<?                                                                          
 /*******************************                                           
  *   用来判断是否闰年的函数    *                                           
  *   可以根据更复杂的算法改进  *                                           
  *******************************/                                          
  function leap_year($year)                                                 
    {                                                                  
      if($year% 4 == 0) // basic rule                                       
            {                                                               
             return true; // is leap year                                   
            }                                                               
   else                                                                   
     {                                                                    
      return false;                                                       
     }                                                                    
    }                                                                       
                                                                            
 /*******************************                                           
  *   对一些变量进行赋值操作    *                                           
  *   特别注意对二月份的赋值    *                                           
  *******************************/                                          
  function setup()                                                          
   {                                                                        
   global $mon_num;                                                       
   $mon_num=array(31,30,31,30,31,30,31,31,30,31,30,31);                   
     global $mon_name;                                                      
   $mon_name=array("一","二","三","四",                                   
                  "五","六","七","八",                                    
                  "九","十","十一","十二");                               
   if (leap_year($firstday[year])) // basic rule                          
          {                                                                 
            $mon_num[1]=29; // is leap year                                 
          }                                                                 
   else                                                                   
   {                                                                      
     $mon_num[1]=28;                                                      
   }                                                                      
   }                                                                        
                                                                            
 /*******************************                                           
  *   显示表格中的一格          *                                           
  *   显示的内容和颜色可变      *                                           
  *******************************/                                          
        function showline($content,$show_color)                             
        {                                                                   
         $begin_mark = "<TD WIDTH=60 HEIGHT=25>";                           
  $begin_mark =$begin_mark."<FONT COLOR=$show_color>";                    
  $end_mark = "</FONT></TD>";                                             
         echo $begin_mark.$content.$end_mark ;                              
        }                                                                   
                                                                            
                                                                            
?>                                                                          
                                                                            
<!--日历程序的正式开始-->                                                   
<html>                                                                      
                                                                            
<head>                                                                      
                                                                            
<title>                                                                     
社区日历                                                                    
</title>                                                                    
                                                                            
<meta http-equiv=content-type content="text/html; charset=gb2312">          
                                                                            
<head>                                                                      
                                                                            
<body>                                                                      
                                                                            
<?                                                                          
   //获得当前的日期                                                         
   $firstday  = getdate(mktime(0,0,0,date("m"),1,date("Y")));               
                                                                            
   setup();                                                                 
                                                                            
        //显示表格的名称                                                    
 echo "<CENTER>";                                                         
 echo "<TABLE BORDER=2  CELLSPACING=4>";                                  
 echo "<TH COLSPAN=7 HEIGHT=50>";                                         
 echo "<FONT COLOR=red SIZE=3 >";                                         
 echo "$firstday[year]年 &nbsp".$mon_name[$firstday[mon]-1]."月&nbsp月历";
 echo "</FONT>";                                                          
 echo "</TH>";                                                            
                                                                          
        //表头                                                              
 $weekDay[0] = "日";                                                      
 $weekDay[1] = "一";                                                      
 $weekDay[2] = "二";                                                      
 $weekDay[3] = "三";                                                      
 $weekDay[4] = "四";                                                      
 $weekDay[5] = "五";                                                      
 $weekDay[6] = "六";                                                      
                                                                          
 echo "<TR ALIGN=\"center\" VALIGN=\"center\">";                          
                                                                          
 //显示表格的第一行                                                       
 for ($dayNum = 0; $dayNum < 7; ++$dayNum) {                              
    showline($weekDay[$dayNum],"red");                                    
 }                                                                        
                                                                          
 echo"</TR>";                                                             
                                                                          
   $toweek=$firstday[wday];//本月的第一天是星期几                           
   $lastday=$mon_num[$firstday[mon]-1];//本月的最后一天是星期几             
   $day_count = 1;//当前应该显示的天数                                      
 $up_to_firstday = 1;//是否显示到本月的第一天                             
                                                                          
 for ($row = 0; $row <= ($lastday+$toweek-1)/7; ++$row)//本月有几个星期   
 { echo "<TR ALIGN=center VALIGN=center>";                          
  for ($col=1; $col<=7; ++$col)                                    
  {                                                                
          //在第一天前面显示的都是"空"                             
   if (($up_to_firstday <= $toweek) ||($day_count>$lastday))
   {                                                        
    echo "<TD>&nbsp</TD>";                           
    $up_to_firstday++;                               
   }                                                        
   else                                                     
          {                                                        
                //显示本月中的某一天                                        
               showline($day_count,"blue");                                 
    $day_count++;                                    
                 }                                                        
  }                                                                
  echo "</TR>";                                                    
 }                                                                        
                                                                          
 echo "</TABLE>";                                                         
 echo "</CENTER>";                                                        
?>                                                                          
</body>                                                                     
</html>