php简单日历函数

<?php /* * php 输出日历程序 */ header("Content-type: text/html;charset=utf-8"); $year=(!isset($_GET['year'])||$_GET['year']=="")?date("Y"):$_GET['year']; $month=(!isset($_GET['month'])||$_GET['month']=="")?date("n"):$_GET['month']; $curUrl=$_SERVER['PHP_SELF'];  if($year<1971){   echo "出错!";   echo "<BR>";   echo "<a href=",$curUrl,">Back</a>";   exit(); } ?> <table width="200" border="1" cellspacing="0" cellpadding="0" bordercolor="#E7E7E7" style="font-size:12px;" align="center"> <tr align="center"><td colspan="2"> <?php //<-------当月份超出1至12时的处理;开始-------> if($month<1){   $month=12;   $year-=1; } if($month>12){   $month=1;   $year+=1; } //<-------当月份超出1至12时的处理;结束-------> //<---------上一年,下一年,上月,下月的连接处理及输出;开始---------> echo "<a href=",$curUrl,"?year=".($year-1)."&month=".$month."><<</a>年<a href=",$curUrl,"?year=".($year+1)."&month=".$month.">>></a>"; ?> </td><td colspan="3"><?php echo $year."年".$month."月";?> </td><td colspan="2"> <?php echo "<a href=",$curUrl,"?month=".($month-1)."&year=".$year."><<</a>月<a href=",$curUrl,"?month=".($month+1)."&year=".$year.">>></a>"; //<--------上一年,下一年,上月,下月的连接处理及输出;结束---------> ?></td></tr> <tr align=center><td><font color="red">日</font></td><td>一</td><td>二</td><td>三</td><td>四</td><td>五</td><td>六</td></tr><tr> <?php $d=date("d"); $FirstDay=date("w",mktime(0,0,0,$month,1,$year));//取得任何一个月的一号是星期几,用于计算一号是由表格的第几格开始 $bgtoday=date("d"); function font_color($month,$today,$year){//用于计算星期天的字体颜色   $sunday=date("w",mktime(0,0,0,$month,$today,$year));   if($sunday=="0"){     $FontColor="red";   }else{     $FontColor="black";   }   return $FontColor; } function bgcolor($month,$bgtoday,$today_i,$year){//用于计算当日的背景颜色   $show_today=date("d",mktime(0,0,0,$month,$today_i,$year));   $sys_today=date("d",mktime(0,0,0,$month,$bgtoday,$year));   if($show_today==$sys_today){   $bgcolor="bgcolor=#6699FF";   }else{   $bgcolor="";   }   return $bgcolor; } function font_style($month,$today,$year){//用于计算星期天的字体风格   $sunday=date("w",mktime(0,0,0,$month,$today,$year));   if($sunday=="0"){     $FontStyle="<strong>";   }else{     $FontStyle="";   }   return $FontStyle; } for($i=0;$i<=$FirstDay;$i++){//此for用于输出某个月的一号位置   for($i;$i<$FirstDay;$i++){     echo "<td align=center> </td>/n";   }   if($i==$FirstDay){     echo "<td align=center ".bgcolor($month,$bgtoday,1,$year)."><font color=".font_color($month,1,$year).">".font_style($month,1,$year)."1</font></td>/n";     if($FirstDay==6){//判断1号是否星期六       echo "</tr>";     }   } } $countMonth=date("t",mktime(0,0,0,$month,1,$year));//某月的总天数 for($i=2;$i<=$countMonth;$i++){//输出由1号定位,随后2号直至月尾的所有号数   echo "<td align=center ".bgcolor($month,$bgtoday,$i,$year)."><font color=".font_color($month,$i,$year).">".font_style($month,$i,$year)."$i</font></td>/n";   if(date("w",mktime(0,0,0,$month,$i,$year))==6){//判断该日是否星期六     echo "</tr>/n";   } } ?> </table>