PHP制作日历，实现在1970年到2020年之间的任何一个月份的输出。上半部分

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<html xmlns="http://www.51sjk.com/Upload/Articles/1/0/257/257890_20210630002440874.jpg">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>月历表</title>
<?php
 $MONTH = array("元月","一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月");
 $enMONTH = array("元月","January" ,"February" ,"Marcy" ,"April" ,"May" ,"June" ,"July" ,"August" ,"September" ,"October" ,"November" ,"December");
 $WEEK = array("Sun","Mon","Tues","Wed","Thur","Fri","Sat",);
 $BACKCOLOR = array("#FFC" , "#FFF" , "#9F6" , "#FFC" , "#6F0" , "#6F6" , "#F90" , "#F06" , "#F00" , "#FC3" , "#FF6" , "#F99");
 
 function PrintMon($year, $mon)
 {
 date_default_timezone_set("Asia/Shanghai"); 
 global $MONTH;
 global $enMONTH;
 global $WEEK;
 global $BACKCOLOR;
 $startdate =strtotime("1 $enMONTH[$mon] $year"); //获取查询的年月
 $enddate = strtotime("+1 month",$startdate);   //获取下一个月的开始日期作为月历输出的截止时间
 $theDate = getdate($startdate); //把日期转化为字符串格式
 $color = $WRITECOLOR[$mon]; //设置月历的背景颜