PHP提供了date()函數，該函數提供了豐富的日期處理功能。現在需要獲得的數據有兩個，第一個是當月的總天數；第二個是該月的第一天所在星期中的第幾天，數字表示0（表示星期天）到6（表示星期六）。
通過date()函數可以很容易獲得上面的數據
代碼如下 復制代碼<?php
$month = $_GET['m']?$_GET['m']:date(‘n’);
$year = $_GET['y']?$_GET['y']:date(‘Y’);
$start_week = date(‘w’,mktime(0,0,0,$month,1,$year));
$day_num = date(‘t’,mktime(0,0,0,$month,1,$year));
$end = false;
?>
<table>
<tr>
<td>星期日</td><td>星期一</td><td>星期二</td><td>星期三</td><td>星期四</td><td>星期五</td><td>星期六</td>
</tr>
<tr>
<?php
for($i = 0; $i<$start_week; $i++)
{
echo “<td></td>”;
}
$j=1;
while($j<=$day_num)
{
echo “<td>$j</td>”;
$week = ($start_week+$j-1)%7;
if($week ==6){
echo “nt</tr>n”;
if($j != $day_num)
echo “t<tr>ntt”;
else $end = true;
}
$j++;
}
while($week%7 != 6)
{
echo “<td></td>”;
$week++;
}
if(!$end)
echo “n</tr>”;
?>
</table>
高級一點類
代碼如下 復制代碼<?php
class Calendar
{
private $year;
private $month;
private $weeks = array('日','一','二','三','四','五','六');
function __construct($options = array()) {
$this->year = date('Y');
$this->month = date('m');
$vars = get_class_vars(get_class($this));
foreach ($options as $key=>$value) {
if (array_key_exists($key, $vars)) {
$this->$key = $value;
}
}
}
function display()
{
echo '<table class="calendar">';
$this->showChangeDate();
$this->showWeeks();
$this->showDays($this->year,$this->month);
echo '</table>';
}
private function showWeeks()
{
echo '<tr>';
foreach($this->weeks as $title)
{
echo '<th>'.$title.'</th>';
}
echo '</tr>';
}
private function showDays($year, $month)
{
$firstDay = mktime(0, 0, 0, $month, 1, $year);
$starDay = date('w', $firstDay);
$days = date('t', $firstDay);
echo '<tr>';
for ($i=0; $i<$starDay; $i++) {
echo '<td> </td>';
}
for ($j=1; $j<=$days; $j++) {
$i++;
if ($j == date('d')) {
echo '<td class="today">'.$j.'</td>';
} else {
echo '<td>'.$j.'</td>';
}
if ($i % 7 == 0) {
echo '</tr><tr>';
}
}
echo '</tr>';
}
private function showChangeDate()
{
$url = basename($_SERVER['PHP_SELF']);
echo '<tr>';
echo '<td><a href="?'.$this->preYearUrl($this->year,$this->month).'">'.'<<'.'</a></td>';
echo '<td><a href="?'.$this->preMonthUrl($this->year,$this->month).'">'.'<'.'</a></td>';
echo '<td colspan="3"><form>';
echo '<select name="year" onchange="window.location=''.$url.'?year='+this.options[selectedIndex].value+'&month='.$this->month.''">';
for($ye=1970; $ye<=2038; $ye++) {
$selected = ($ye == $this->year) ? 'selected' : '';
echo '<option '.$selected.' value="'.$ye.'">'.$ye.'</option>';
}
echo '</select>';
echo '<select name="month" onchange="window.location=''.$url.'?year='.$this->year.'&month='+this.options[selectedIndex].value+''">';
for($mo=1; $mo<=12; $mo++) {
$selected = ($mo == $this->month) ? 'selected' : '';
echo '<option '.$selected.' value="'.$mo.'">'.$mo.'</option>';
}
echo '</select>';
echo '</form></td>';
echo '<td><a href="?'.$this->nextMonthUrl($this->year,$this->month).'">'.'>'.'</a></td>';
echo '<td><a href="?'.$this->nextYearUrl($this->year,$this->month).'">'.'>>'.'</a></td>';
echo '</tr>';
}
private function preYearUrl($year,$month)
{
$year = ($this->year <= 1970) ? 1970 : $year - 1 ;
return 'year='.$year.'&month='.$month;
}
private function nextYearUrl($year,$month)
{
$year = ($year >= 2038)? 2038 : $year + 1;
return 'year='.$year.'&month='.$month;
}
private function preMonthUrl($year,$month)
{
if ($month == 1) {
$month = 12;
$year = ($year <= 1970) ? 1970 : $year - 1 ;
} else {
$month--;
}
return 'year='.$year.'&month='.$month;
}
private function nextMonthUrl($year,$month)
{
if ($month == 12) {
$month = 1;
$year = ($year >= 2038) ? 2038 : $year + 1;
}else{
$month++;
}
return 'year='.$year.'&month='.$month;
}
}
調用方法
代碼如下 復制代碼<?php
$params = array();
if (isset($_GET['year']) && isset($_GET['month'])) {
$params = array(
'year' => $_GET['year'],
'month' => $_GET['month'],
);
}
$params['url'] = 'demo.php';
require_once 'calendar.class.php';
?>
<html>
<head>
<title>日歷demo</title>
<meta http-equiv="Content-Type" content="text/html" charset="UTF-8" />
<style type="text/css">
table.calendar {
border: 1px solid #050;
}
.calendar th, .calendar td {
width:30px;
text-align:center;
}
.calendar th {
background-color:#050;
color:#fff;
}
.today{
color:#fff;
background-color:#050;
}
</style>
</head>
<body>
<div style="align:center">
<?php
$cal = new Calendar($params);
$cal->display();
?>
</div>
</body>
</html>
