数据库教程

-- 
-- Table structure for table `category` 
-- 
CREATE TABLE IF NOT EXISTS `category` ( 
`id` int(11) NOT NULL AUTO_INCREMENT, 
`catpath` varchar(255) DEFAULT NULL, 
`name` varchar(255) DEFAULT NULL, 
PRIMARY KEY (`id`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=11 ; 
-- 
-- Dumping data for table `category` 
-- 
INSERT INTO `category` (`id`, `catpath`, `name`) VALUES 
(1, '0', '网站首页'), 
(2, '0-1', 'Linux OS'), 
(3, '0-1', 'Apache服务器'), 
(4, '0-1', 'MySQL数据库'), 
(5, '0-1', 'PHP脚本语言'), 
(6, '0-1-2', 'Linux 系统教程'), 
(7, '0-1-2', 'Linux 网络技术'), 
(8, '0-1-2', 'Linux 安全基础'), 
(9, '0-1-2-7', 'Linux LAMP'), 
(10, '0-1-3-10', 'apache Server');

php教程代码

$conn = mysql教程_connect ( 'localhost', 'root', '' ); 
mysql_select_db ( 'test', $conn ); 
mysql_query ( 'set names UTF8' ); 
$sql = "select id,concat(catpath,'-',id) as abspath,name from category order by abspath"; 
$query = mysql_query ( $sql ); 
while ( $row = mysql_fetch_array ( $query ) ) { 
/** 
* 第一种展示方法 
*/ 
/*$space = str_repeat ( ' ', count ( explode ( '-', $row ['abspath'] ) ) - 1 ); 
echo $space . $row ['name'] . '<br>';*/ 
/** 
* 第二种展示方法 
*/ 
$space = str_repeat ( ' ', count ( explode ( '-', $row ['abspath'] ) ) - 1 ); 
$option .= '<option value="' . $row ['id'] . '">' . $space . $row ['name'] . '</option>'; 
} 
echo '<select name="opt">' . $option . '</select>';

效果

教程链接:http://www.phprm.com/code/39704.html

随意转载~但请保留教程地址★