php 日历源码

date_default_timezone_set("Asia/shanghai");
class CalendarForm {

        private $year;

        private $month;

        private $day;

        private $weekend;

        private $currentdate;

        private $dayofmonth;

        private $day_count;

        private $num;

        private $week = array();

        private $retunrhtml="";

        function __construct($year, $month) {
                $this->makeWeeks($year, $month);
        }

        public function setYearMonth($year, $month) {
                $this->year = $year;
                $this->month = $month;
        }

        private function resetDayCount() {
                $this->day_count = 1;
        }

        private function setFirstWeek() {
                $this->num = 0;
        }

        public function getDayOfMonth($year, $month) {
                $this->resetDayCount();
                return date('t', mktime(0, 0, 0, $month, $this->day_count, $year ));
        }

        private function setDayOfMonth($year, $month) {
                $this->dayofmonth = $this->getDayOfMonth($year, $month);
        }


        private function getDayOfWeek() {
                return date('w', mktime(0, 0, 0, $this->month, $this->day_count, $this->year ));
        }


       public function getNextMonth() {
                return date('m', mktime(0, 0, 0, $this->month, 28, $this->year )+432000);
        }

        public function getNextYear() {
                return date('Y', mktime(0, 0, 0, $this->month, 28, $this->year )+432000);
        }

        public function getPrevMonth() {
                return date('m', mktime(0, 0, 0, $this->month, 1, $this->year )-432000);
        }

        public function getPrevYear() {
                return date('Y', mktime(0, 0, 0, $this->month, 1, $this->year )-432000);
        }

        private function makeWeeks($year, $month) {

                $this->setYearMonth($year, $month);
                $this->setDayOfMonth($this->year, $this->month);
                $this->setFirstWeek();

                $this->num = 0;
                for($i = 0; $i < 7; $i++) {

                        $dayofweek = $this->getDayOfWeek();
                        $dayofweek = $dayofweek - 1;
                        if($dayofweek == -1) $dayofweek = 6;
                        if($dayofweek == $i) {
                                $this->week[$this->num][$i] = $this->day_count;
                                $this->day_count++;
                        } else {
                                $this->week[$this->num][$i] = "";
                        }
                }
               while(true) {
                        $this->num++;
                        for($i = 0; $i < 7; $i++) {
                                $this->week[$this->num][$i] = $this->day_count;
                                $this->day_count++;
                                if($this->day_count > $this->dayofmonth) break;
                        }
                        if($this->day_count > $this->dayofmonth) break;
                }

        }

        public function getCalendarHeader() {
                $this->retunrhtml =
                                                "

.
                                                "".
                                                "".$this->month."/".$this->year."".
                                                "".
                                                "周一".
                                                "周二".
                                                "周三".
                                                "周四".
                                                "周五".
                                                "周六".
                                                "周日".
                                                "";
        }

        public function getCalendarFooter() {
                $this->retunrhtml.="";
        }

        public function getBeginTR() {
                $this->retunrhtml.="";
        }

        public function getEndTR() {
                $this->retunrhtml.="";
        }

        protected function getDay() {
                return $this->day;
        }

        protected function getMonth() {
                return $this->month;
        }

        protected function getYear() {
                return $this->year;
        }

        protected function isWeekend() {
                return $this->weekend;
        }

        protected function isCurrent() {
                return $this->currentdate;
        }

        public function getTDHref() {
                return $this->getDay();
        }

        public function getTD() {
                $td="td"; if ($this->isCurrent()) $td="th";
                $this->retunrhtml.="<$td style=\"text-align: right;\">".$this->getTDHref()."</$td>";
        }

        public function getTDWeekend() {
                $td="td"; if ($this->isCurrent()) $td="th";
                $this->retunrhtml.="<$td style=\"text-align: right;\">".$this->getTDHref()."</$td>";
        }

        protected function makeCodeMonth($year, $month) {
                $this->makeWeeks($year, $month);
                $this->getCalendarHeader();
                for($i = 0; $i < count($this->week); $i++) {
                        $this->getBeginTR();
                        for($j = 0; $j < 7; $j++) {

                                if(!empty($this->week[$i][$j])) {
                                        $this->day = $this->week[$i][$j];
                                        $this->currentdate = 0;
                                        if ( $this->year==date('Y') && $this->month==date('m') && $this->day==date('j')) $this->currentdate = 1;
                                        if($j == 5 || $j == 6) {
                                                $this->weekend = 1;
                                                $this->getTDWeekend();
                                        } else {
                                                $this->weekend = 0;
                                                $this->getTD();
                                        }

                                } else $this->retunrhtml.="
";

                        }
                        $this->getEndTR();
                }
                $this->getCalendarFooter();
        }

        public function getCodeMonth() {
                $this->makeCodeMonth($this->year, $this->month);
                return $this->retunrhtml;
        }

        public function showCodeMonth() {
                echo $this->getCodeMonth();
        }

}

class TechCalendarForm extends CalendarForm {
        public function getTDHref() {
                if ($this->isWeekend()) $font = ""; else $font = "";
                return ".$_SERVER["PHP_SELF"]."?action=showdate&date=".parent::getYear()."-".parent::getMonth()."-".parent::getDay()."\">".$font.parent::getDay()."";
        }
}


?>
<html>
<head>
 <style type="text/css">  
 .align-center{  
     margin:0 auto;      /* 居中 这个是必须的，，其它的属性非必须 */  
     width:789px;        /* 给个宽度 顶到浏览器的两边就看不出居中效果了 */  
    // background:red;     /* 背景色 */  
     text-align:center;  /* 文字等内容居中 */  
 }  
 </style> 
</head>
<body>
<div class="align-center">
 
    //$cal= new TechCalendarForm(2009,10);
    $cal= new CalendarForm(2009,10);
    $cal->showCodeMonth();
?>
</div>
</body>
</html>