PHP Learning Notes Calendar table

<title>Calendar table</title>
$MONTH = Array ("All", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");
$enMONTH = Array ("January", "February", "Marcy", "April", "may", "June", "July", "August", "September", "October", "N Ovember "," December ");
$WEEK = Array ("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday");
$BACKCOLOR = Array ("#FFC", "#FFF", "#9F6", "#FFC", "#6F0", "#6F6", "#F90", "#F06", "#F00", "#FC3", "#FF6", "#F9 9 ");

function Printmon ($year, $mon)
{
Date_default_timezone_set ("Asia/shanghai");
Global $MONTH;
Global $enMONTH;
Global $WEEK;
Global $BACKCOLOR;

$startdate =strtotime ("1 $enMONTH [$mon] $year"); Gets the date of the query
$enddate = Strtotime ("+1 month", $startdate); Gets the start date for the next one months as a deadline for the monthly calendar output
$theDate = getdate ($startdate); Convert date to string format
$color = $BACKCOLOR [$mon]; Set the background color for a month calendar

Echo ("



");$ym = $year. "Year". $MONTH [$mon];Echo (" ");Echo (" "); for ($i =0; $i <7; $i + +)//output Day of the week {echo (" "); } Echo (" "); $theWeek = $theDate [wday];//determines the day of the weekfor ($i =0; $i <6; $i + +){Echo (" "); for ($j =0; $j <7; $j + +) {echo (" "); } Echo (" ");if ($startdate = = $enddate)//If the full date has been output, end the loop{$i = 6;}} Echo ("}?> $year = $_post[' myyear ');$month = $_post[' mymonth ');if (Is_numeric ($year) && $year >= 1970 && $year <2038){if (Is_numeric ($month) && $month >= 1 && $month <=12){Printmon ($year, $month);}else if ($month! = NULL){Echo ("Month is wrong".) "");}}else if ($year! = NULL){Echo ("Wrong Year".) "");}?>

$ym

"); Echo (" $WEEK [$i] "); Echo ("

"); if ($startdate < $enddate && $theWeek = = $j)//Output the date to the corresponding day of the week, and be careful not to exceed this month's date { $theDay = $theDate [Mday]; Echo (" $theDay "); $startdate = Strtotime ("+1 Day", $startdate); Date moved forward 1 days $theDate = getdate ($startdate);//Update date $theWeek = ($theWeek + 1)% 7;//Update week } Echo ("