Full code for the implementation of the million calendar in PHP

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<?php//Modify the page encoding header ("Content-type:text/html;charset=utf-8");//Get current year $year=$_get[' y ']?$_get[' y ']:d ate (' y ');// Gets the current month $month=$_get[' m ']?$_get[' m ']:d ate (' m '),//Gets the number of days of the present month $days=date (' t ', Strtotime ("{$year}-{$month}-1"));//Current number of weeks $week =date (' W ', Strtotime ("{$year}-{$month}-1"),//center echo "<center>",//Calculate last month if ($month ==1) {$prevyear =$    Year-1; $prevmonth = 12;}    else{$prevyear = $year; $prevmonth = $month-1;}    Calculate next month if ($month ==12) {$nextyear = $year +1; $nextmonth = 1;}    else{$nextyear = $year; $nextmonth = $month +1;} Output header echo "