PHP日历

通过date函数能够自己写一个日历
 1 <?php
 2 header("Content-type:text/html;charset=utf-8");
 3 echo(date_sunset(time(),SUNFUNCS_RET_STRING,38.4,-9,90,1));
 4 $arr=array('星期一','星期二','星期三','星期四','星期五','星期六','星期日');
 5 $y=$_GET['y']?$_GET['y']:date("Y");
 6 $m=$_GET['m']?$_GET['m']:date("m");
 7 echo "当前是".$y."年".$m."月";
 8 echo "<table border='1' width='60%' align='center'>";
 9 echo "<tr>";
10 foreach($arr as $val)
11 {
12     echo "<th>".$val."</th>";    
13 }
14 echo  "</tr>";
15 $w=date("N",strtotime($y."-".$m."-01"));
16 echo "<tr>";
17 for($i=1;$i<$w;$i++)
18 {
19     echo "<td>&nbsp;</td>";
20     
21 }
22 $day=date("t");
23 for($i=1;$i<=$day;$i++)
24     {
25         $n=date("N",strtotime($y."-".$m."-".$i));
26                 
27          if($n%7==1)
28          {
29             echo "<tr>" ;    
30          }         
31          echo "<td>";
32          echo $i;
33          echo "</td>";
34         if($n%7==0) 
35         {
36             echo "</tr>";
37         }
38     }
39     $n=date("N",strtotime($y."-".$m."-".$day));
40     while($n<7)
41     {
42         echo $n;
43 
44         echo "<td>";
45         echo "&nbsp";
46         echo "</td>";
47         $n++;
48         
49     }
50 echo "</table>";
51 $ny=$y+1;
52 $nm=$m+1;
53 $by=$y-1;
54 $bm=$m-1;
55 ?>
56 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href=study.php?y=<?php echo $by;?>&m=<?php echo $bm;?>>上一年</a>&nbsp;<a href=study.php?m=<?php echo $bm;?>>上一月</a>&nbsp;<a href=study.php?m=<?php echo $nm;?>>下一月</a>&nbsp;<a href=study.php?y=<?php echo $ny;?>>下一年</a>