<?
@date_default_timezone_set('RPC');

function show_calender(){
  
  //code by hqlulu
  //date:2007-12-12
  //web: https://www.aslibra.com

  $starttime=microtime();

  //处理请求日期
  $y=  isset($_GET["y"]) ? intval($_GET["y"]) : date("Y");
  $m=  isset($_GET["m"]) ? intval($_GET["m"]) : date("m");
  if($m<1 || $m>12)$m=date("m");
  if($y<=0)$y=date("Y");

  //下个月
  $nm=$m+1;
  if($nm>12){
    $nm=1;
    $ny=$y+1;
  }else{
    $ny=$y;
  }

  //前一月
  $pm=$m-1;
  if($pm<1){
    $pm=12;
    $py=$y-1;
  }else{
    $py=$y;
  }

  //获取本月名称
  $month = date("M",mktime(0, 0, 0, $m, 1, $y));

  //获取本月最后一天
  $lastday = date("d",mktime(0, 0, 0, $nm, 0, $ny));

  //获取开始一天的星期几
  $index = date("w",mktime(0, 0, 0, $m, 1, $y));

  //生成日历头
  echo "<table>\n<thead><tr><th colspan='1'><a href='?y={$py}&m={$pm}'>-</a></th><th colspan='5'> {$y} {$month} </th><th colspan='1'><a href='?y={$ny}&m={$nm}'>+</a></th></tr><thead>\n<tbody><tr><td>日</td><td>一</td><td>二</td><td>三</td><td>四</td><td>五</td><td>六</td></tr>";

  //处理日历
  $row=0;
  $day=1;
  while(1){
    echo "<tr>";
    if($row==0){
      for($i=0;$i<=6;$i++)
        if($i<$index)
          echo "<td>&nbsp;</td>";
        else
          echo "<td>".$day++."</td>";
    }else{
      for($i=0;$i<=6;$i++)
        if($day>$lastday)
          echo "<td>&nbsp;</td>";
        else
          echo "<td>".$day++."</td>";
    }
    echo "</tr>";
    $row++;
    if($day>$lastday)break;
  }
  echo "</table>";

  $endtime=microtime();
  $usedtime=$endtime-$starttime;
  return $usedtime;
}

$run_info=array();
for($i=0;$i<10;$i++)
  $run_info[]=show_calender();

print_r($run_info);
?>