PHP生成月历代码

Functionusage:calendar(Month,Year)
*/

functioncalendar($MM,$YYYY){
if($MM=="")$MM=date("m");
if($YYYY=="")$YYYY=date("Y");
if(checkdate($MM,1,$YYYY)){
$stringDate=strftime("%d%b%Y",mktime(0,0,0,$MM,1,$YYYY));
$days=strftime("%d",mktime(0,0,0,$MM+1,0,$YYYY));
$firstDay=strftime("%w",mktime(0,0,0,$MM,1,$YYYY));
$lastDay=strftime("%w",mktime(0,0,0,$MM,$days,$YYYY));
$printDays=$days;
$preMonth=strftime("%m",mktime(0,0,0,$MM-1,1,$YYYY));
$preYear=strftime("%Y",mktime(0,0,0,$MM-1,1,$YYYY));
$nextMonth=strftime("%m",mktime(0,0,0,$MM+1,1,$YYYY));
$nextYear=strftime("%Y",mktime(0,0,0,$MM+1,1,$YYYY));
print("");
print("P");
print("".strftime("%b%Y",mktime(0,0,0,$MM,1,$YYYY))."");
print("N");
print("");
print("SunMonTueWedThuFriSat");

$currentDays=1;
for($a=1;$a<=5;$a++){
print("");
$diffDays=$firstDay-$lastDay;
if($firstDay>$lastDay&&$currentDays==1&&($diffDays<>1)){
for($x=$lastDay;$x>=0;$x--){
$printDays=$days-$x;
print("$printDays");
}
for($z=1;$z<$firstDay-$lastDay;$z++){
print("");
}
for($y=$firstDay;$y<7;$y++){
print("$currentDays");
$currentDays++;
}
}elseif($firstDay!=0&&$currentDays==1){
for($z=1;$z<=$firstDay;$z++){
print("");
}
for($y=$firstDay;$y<7;$y++){
print("$currentDays");
$currentDays++;
}
}else{
for($u=1;$u<=7&&$currentDays<=$days;$u++){
print("$currentDays");
$currentDays++;
}
}
print("");
}
print("");
}
}
?>