一个PHP日历程序

php// if($HTTP_GET_VARS[year]==""){$HTTP_GET_VARS[year]=date("Y");}if($HTTP_GET_VARS[month]==""){$HTTP_GET_VARS[month]=date("n");}$month=$HTTP_GET_VARS[month];$year=$HTTP_GET_VARS[year];// if($year{echo "出错!";echo "";echo "Back";exit();}?>//if($month{$month=12;$year-=1;}if($month>12){$month=1;$year+=1;}////***************************************//echo "年>>";?>echo "月>>";//?>日一二三四五六$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="";}else{$Font;}return $FontStyle;}for($i=0;$i{for($i;$i    {echo "\n";}if($i==$FirstDay){echo "".font_style($month,1,$year)."1\n";if($FirstDay==6)//判断1号是否星期六{echo "";}}}$countMonth=date("t",mktime(0,0,0,$month,1,$year));//某月的总天数for($i=2;$i{echo "".font_style($month,$i,$year)."$i\n";if(date("w",mktime(0,0,0,$month,$i,$year))==6)//判断该日是否星期六{echo "\n";}}?>