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【PHP】 PHP生成日历
作者:RickyFeng / 发布于2011/9/18/ 1459
<div><?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', $firstDay);</div>
<div> echo '<tr>';
 for ($i=0; $i<$starDay; $i++) {
 echo '<td>&nbsp;</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+\'\'">';
</div>
<div> 
 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;
 }
 
}
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