Simple PHP calendar algorithm_PHP tutorial

/**
* Calendar
*
* Copyright(c) 2007 by Chen Yixin (Deep Sky). All rights reserved
* To contact the author write to {@link mailto:shenkong@php.net}
* @author Chen Yixin (Deep Sky)
​*/
 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 < $end['mday']; $i++) { 
     if (!isset($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;  
 

http://www.bkjia.com/PHPjc/371563.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/371563.htmlTechArticle/*** Calendar * * Copyright(c) 2007 by 陈伊鑫(深空). All rights reserved * To contact the author write to {@link mailto:shenkong@php.net } * @author 陈伊鑫(深空)*/ if (fu...