PHP在线日历，PHP日历，灵活运用PHPstrtotime生成简单日历

PHP在线日历的实现
以下是代码，由于本人水平有限，代码不够完善，请大家谅解！

 *@version $Id:calendar.php,v 1.0 2011/02/12 15:12:00 uw Exp
 *@copyright ©2011,xudianyang
 */ /**
 *PHP生成一个简单的在线日历
 *
 *@param string $language 日历语言，值为EN,表示英文，值为CN，代表中文
 *@return string 返回日历的HTML代码
 */
define("EMPTY_COLUMN","");
header("content-type:text/html;charset=gb2312");
function php_calendar($language='EN'){
	$lang=array('EN','CN');
	if(!in_array($language,$lang)){
		$language="EN";
	}
	$mOnths=array('January','February','March','April','May','June','July','August','September','October','November','December');
	$EN=array(
		'month'=>
		array('January'=>'January','February'=>'February',
			'March'=>'March','April'=>'April',
			'May'=>'May','June'=>'June',
			'July'=>'July','August'=>'August',
			'September'=>'September','October'=>'October',
			'November'=>'November','December'=>'December',),
		'week'=>
		array('Mon'=>'Mon','Tue'=>'Tue','Wed'=>'Wed','Thu'=>'Thu','Fri'=>'Fri','Sat'=>'Sat','Sun'=>'Sun'),
		'today'=>'today',
	);
	$CN=array(
		'month'=>
		array('January'=>'一月','February'=>'二月',
			'March'=>'三月','April'=>'四月',
			'May'=>'五月','June'=>'六月',
			'July'=>'七月','August'=>'八月',
			'September'=>'九月','October'=>'十月',
			'November'=>'十一月','December'=>'十二月',),
		'week'=>
		array('Mon'=>'星期一','Tue'=>'星期二','Wed'=>'星期三','Thu'=>'星期四','Fri'=>'星期五','Sat'=>'星期六','Sun'=>'星期天'),
		'today'=>'转到今天',
	);
	if(isset($_GET['month']) && in_array($_GET['month'],$months)){
		$mOnth=$_GET['month'];
	}else{
		$mOnth=date("F");
	}
	if(isset($_GET['year']) && is_numeric($_GET['year']) && $_GET['year']<=2038 && $_GET['year']>=1970){
		$year=$_GET['year'];
	}else{
		$year=date("Y");
	}
	$start=strtotime("$month 1st $year");
	$end=strtotime("$month ".date("t",$start)." $year");
	$previous_year=strtotime("-1 year",$start);
	$next_year=strtotime("+1 year",$start);
	$previous_mOnth=strtotime("-1 month",$start);
	$next_mOnth=strtotime("+1 month",$start);
	$link="%s";
	if(date("Y",$previous_year)>= 1970){
		$calendar[]=sprintf($link,date("F",$start),date("Y",$previous_year),date("Y",$previous_year));
	}else{
		$calendar[]=EMPTY_COLUMN;
	}
	$calendar[]=EMPTY_COLUMN;
	$calendar[]=EMPTY_COLUMN;
	$calendar[]=date("Y",$start);
	$calendar[]=EMPTY_COLUMN;
	$calendar[]=EMPTY_COLUMN;
	if(date("Y",$next_year)<2038 && date("Y",$next_year)!=1969){
		$calendar[]=sprintf($link,date("F",$start),date("Y",$next_year),date("Y",$next_year));
	}else{
		$calendar[]=EMPTY_COLUMN;
	}
	$calendar[]=sprintf($link,date("F",$previous_month),date("Y",$previous_month),${$language}['month'][date("F",$previous_month)]);
	$calendar[]=EMPTY_COLUMN;
	$calendar[]=EMPTY_COLUMN;
	$calendar[]=${$language}['month'][date("F",$start)];
	$calendar[]=EMPTY_COLUMN;
	$calendar[]=EMPTY_COLUMN;
	$calendar[]=sprintf($link,date("F",$next_month),date('Y',$next_month),${$language}['month'][date('F',$next_month)]);
	$calendar[]=${$language}['week']['Mon'];
	$calendar[]=${$language}['week']['Tue'];
	$calendar[]=${$language}['week']['Wed'];
	$calendar[]=${$language}['week']['Thu'];
	$calendar[]=${$language}['week']['Fri'];
	$calendar[]=${$language}['week']['Sat'];
	$calendar[]=${$language}['week']['Sun'];
	$blank_td=date("N",$start);

	for($i=1;$i<$blank_td;$i++){
		$calendar[]=EMPTY_COLUMN;
	}
	$dates=range(1,date("t",$start));
	foreach($dates as $value){
		$calendar[]=$value;
	}
	$cc=count($calendar);
	for($i=1;$i<=63-$cc;$i++){
		$calendar[]=EMPTY_COLUMN;
	}
	$k=0;
	$today=date("Y")." ".date("F")." ".date("j");
	$html="";
	for($i=1;$i<=9;$i++){
		$html.="";
		for($j=1;$j<=7;$j++){
			if(is_int($calendar[$k])){
				$cur_date="$year $month $calendar[$k]";
				if($cur_date == $today){
					$html.="";
				}else{
					$html.="";
				}
			}else{
				$html.="";
			}
		}
		$html.="";
	}
	$html.='';
	$html.="
".$calendar[$k++]."
".$calendar[$k++]."
".$calendar[$k++]."
'.sprintf($link,date('F'),date('Y'),${$language}['today']).'
";
	return $html;
}
echo "英文版本日历：
";
echo php_calendar("EN");
echo "
";
echo "中文版本日历：
";
echo php_calendar("CN");
?>