简单的PHP日历算法

/**
* 日历
*
* Copyright(c) 2007 by 陈毅鑫(深空). All rights reserved
* To contact the author write to {@link mailto:[e-mail]}
* @author 陈毅鑫(深空)
*/
if (function_exists('date_default_timezone_set')) {
date_default_timezone_set('Asia/Chongqing');
}
$date = isset($_GET['date']) ? $_GET['date'] : date('Y-m-d');
$date = getdate(strtotime($date));
$end = getdate(mktime(0, 0, 0, $date['mon'] + 1, 1, $date['year']) - 1);
$start = getdate(mktime(0, 0, 0, $date['mon'], 1, $date['year']));
$pre = date('Y-m-d', $start[0] - 1);
$next = date('Y-m-d', $end[0] + 86400);
$html = '';
$html .= '';
$html .= '';
$html .= '';
$html .= '';
$html .= '';
$arr_tpl = array(0 => '', 1 => '', 2 => '', 3 => '', 4 => '', 5 => '', 6 => '');
$date_arr = array();
$j = 0;
for ($i = 0; $i if (!isset($date_arr[$j])) {
$date_arr[$j] = $arr_tpl;
}
$date_arr[$j][($i+$start['wday'])%7] = $i+1;
if ($date_arr[$j][6]) {
$j++;
}
}
foreach ($date_arr as $value) {
$html .= '';
foreach ($value as $v) {
if ($v) {
if ($v == $date['mday']) {
$html .= '';
} else {
$html .= '';
}
} else {
$html .= '';
}
}
$html .= '';
}
$html .= '

-	' . $date['year'] . ';' . $date['month'] . '					+
' . $v . '	' . $v . '

';
echo $html;