我有来自J Bruni的代码，我在另一篇SO帖子中找到了这个代码。但是我的数据库结构有点不同，我需要让这些代码与我的表结构一起使用。
原始代码适用于此结构：
/*** SAMPLE DATABASE: ***
CREATE TABLE `menu_item` (
`id` int(11) NOT NULL,
`title` varchar(75) DEFAULT NULL,
`link` varchar(100) DEFAULT NULL,
`parent_id` int(11) DEFAULT NULL,
`position` int(11) DEFAULT NULL,
PRIMARY KEY (`id`)
);
INSERT INTO `menu_item` (`id`, `title`, `link`, `parent_id`, `position`) VALUES (1,'1','1.html',0,1);
INSERT INTO `menu_item` (`id`, `title`, `link`, `parent_id`, `position`) VALUES (2,'2','2.html',0,2);
INSERT INTO `menu_item` (`id`, `title`, `link`, `parent_id`, `position`) VALUES (3,'11','11.html',1,1);
INSERT INTO `menu_item` (`id`, `title`, `link`, `parent_id`, `position`) VALUES (4,'12','12.html',1,2);
INSERT INTO `menu_item` (`id`, `title`, `link`, `parent_id`, `position`) VALUES (5,'21','21.html',2,1);
INSERT INTO `menu_item` (`id`, `title`, `link`, `parent_id`, `position`) VALUES (6,'22','22.html',2,2);
INSERT INTO `menu_item` (`id`, `title`, `link`, `parent_id`, `position`) VALUES (7,'3','3.html',0,3);
*/
但是我的表结构是这样的：
CREATE TABLE tbmenu (
row_id Integer(11) NOT NULL AUTO_INCREMENT,
category_id Integer(11) NOT NULL,
menuitem NVarChar(128) COLLATE utf8_general_ci NOT NULL,
pageurl NVarChar(128) COLLATE utf8_general_ci NOT NULL,
PRIMARY KEY (
row_id
)
) ENGINE=InnoDB ROW_FORMAT=COMPACT DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
这是原始数据库结构的原始代码：
<?php
/**
* Generate HTML for multi-dimensional menu from MySQL database
* with ONE QUERY and WITHOUT RECURSION
* @author J. Bruni
*/
class MenuBuilder
{
/**
* MySQL connection
*/
var $conn;
/**
* Menu items
*/
var $items = array();
/**
* HTML contents
*/
var $html = array();
/**
* Create MySQL connection
*/
function MenuBuilder()
{
$this->conn = mysql_connect( 'localhost', 'user', 'pass' );
mysql_select_db( 'example', $this->conn );
}
/**
* Perform MySQL query and return all results
*/
function fetch_assoc_all( $sql )
{
$result = mysql_query( $sql, $this->conn );
if ( !$result )
return false;
$assoc_all = array();
while( $fetch = mysql_fetch_assoc( $result ) )
$assoc_all[] = $fetch;
mysql_free_result( $result );
return $assoc_all;
}
/**
* Get all menu items from database
*/
function get_menu_items()
{
// Change the field names and the table name in the query below to match tour needs
$sql = 'SELECT id, parent_id, title, link, position FROM menu_item ORDER BY parent_id, position;';
return $this->fetch_assoc_all( $sql );
}
/**
* Build the HTML for the menu
*/
function get_menu_html( $root_id = 0 )
{
$this->html = array();
$this->items = $this->get_menu_items();
foreach ( $this->items as $item )
$children[$item['parent_id']][] = $item;
// loop will be false if the root has no children (i.e., an empty menu!)
$loop = !empty( $children[$root_id] );
// initializing $parent as the root
$parent = $root_id;
$parent_stack = array();
// HTML wrapper for the menu (open)
$this->html[] = '<ul>';
while ( $loop && ( ( $option = each( $children[$parent] ) ) || ( $parent > $root_id ) ) )
{
if ( $option === false )
{
$parent = array_pop( $parent_stack );
// HTML for menu item containing childrens (close)
$this->html[] = str_repeat( "\t", ( count( $parent_stack ) + 1 ) * 2 ) . '</ul>';
$this->html[] = str_repeat( "\t", ( count( $parent_stack ) + 1 ) * 2 - 1 ) . '</li>';
}
elseif ( !empty( $children[$option['value']['id']] ) )
{
$tab = str_repeat( "\t", ( count( $parent_stack ) + 1 ) * 2 - 1 );
// HTML for menu item containing childrens (open)
$this->html[] = sprintf(
'%1$s<li><a href="%2$s">%3$s</a>',
$tab, // %1$s = tabulation
$option['value']['link'], // %2$s = link (URL)
$option['value']['title'] // %3$s = title
);
$this->html[] = $tab . "\t" . '<ul class="submenu">';
array_push( $parent_stack, $option['value']['parent_id'] );
$parent = $option['value']['id'];
}
else
// HTML for menu item with no children (aka "leaf")
$this->html[] = sprintf(
'%1$s<li><a href="%2$s">%3$s</a></li>',
str_repeat( "\t", ( count( $parent_stack ) + 1 ) * 2 - 1 ), // %1$s = tabulation
$option['value']['link'], // %2$s = link (URL)
$option['value']['title'] // %3$s = title
);
}
// HTML wrapper for the menu (close)
$this->html[] = '</ul>';
return implode( "\r\n", $this->html );
}
}
$menu = new MenuBuilder();
echo '<pre>' . htmlentities( $menu->get_menu_html() ) . '</pre>';
?>
..这是为我的数据库结构修改的代码：
<?php
/**
* Generate HTML for multi-dimensional menu from MySQL database
* with ONE QUERY and WITHOUT RECURSION
* @author J. Bruni
*/
function is_iterable($var)
{
return $var !== null
&& (is_array($var)
|| $var instanceof Traversable
|| $var instanceof Iterator
|| $var instanceof IteratorAggregate
);
}
class MenuBuilder
{
/**
* MySQL connection
*/
var $conn;
/**
* Menu items
*/
var $items = array();
/**
* HTML contents
*/
var $html = array();
/**
* Create MySQL connection
*/
function MenuBuilder()
{
$this->conn = mysqli_connect( "localhost", "rXXXt", "rXXXt" );
mysqli_select_db( $this->conn , "XXXXdb" );
}
/**
* Perform MySQL query and return all results
*/
function fetch_assoc_all( $sql )
{
$result = mysqli_query( $this->conn, $sql );
if ( !$result )
return false;
$assoc_all = array();
while( $fetch = mysqli_fetch_assoc( $result ) )
$assoc_all[] = $fetch;
mysqli_free_result( $result );
return $assoc_all;
}
/**
* Get all menu items from database
*/
function get_menu_items()
{
// Change the field names and the table name in the query below to match tour needs
$sql = "SELECT row_id, category_id, menuitem, pageurl FROM tbmenu ORDER BY row_id;";
return $this->fetch_assoc_all( $sql );
}
/**
* Build the HTML for the menu
*/
function get_menu_html( $root_id = 0 )
{
$this->html = array();
$this->items = $this->get_menu_items();
if (is_iterable($this->items))
{
foreach ( $this->items as $item )
$children[$item['category_id']][] = $item;
}
// loop will be false if the root has no children (i.e., an empty menu!)
$loop = !empty( $children[$root_id] );
// initializing $parent as the root
$parent = $root_id;
$parent_stack = array();
// HTML wrapper for the menu (open)
$this->html[] = "<ul>";
while ( $loop && ( ( $option = each( $children[$parent] ) ) || ( $parent > $root_id ) ) )
{
if ( $option === false )
{
$parent = array_pop( $parent_stack );
// HTML for menu item containing childrens (close)
$this->html[] = str_repeat( "\t", ( count( $parent_stack ) + 1 ) * 2 ) . "</ul>";
$this->html[] = str_repeat( "\t", ( count( $parent_stack ) + 1 ) * 2 - 1 ) . "</li>";
}
elseif ( !empty( $children[$option['value']['row_id']] ) )
{
$tab = str_repeat( "\t", ( count( $parent_stack ) + 1 ) * 2 - 1 );
// HTML for menu item containing childrens (open)
$this->html[] = sprintf(
'%1$s<li><a href="%2$s">%3$s</a>',
$tab, // %1$s = tabulation
$option['value']['pageurl'], // %2$s = link (URL)
$option['value']['menuitem'] // %3$s = title
);
$this->html[] = $tab . "\t" . '<ul class="submenu">';
array_push( $parent_stack, $option['value']['category_id'] );
$parent = $option['value']['row_id'];
}
else
// HTML for menu item with no children (aka "leaf")
$this->html[] = sprintf(
'%1$s<li><a href="%2$s">%3$s</a></li>',
str_repeat( "\t", ( count( $parent_stack ) + 1 ) * 2 - 1 ), // %1$s = tabulation
$option['value']['pageurl'], // %2$s = link (URL)
$option['value']['menuitem'] // %3$s = title
);
}
// HTML wrapper for the menu (close)
$this->html[] = "</ul>";
return implode( "\r\n", $this->html );
}
}
$menu = new MenuBuilder();
echo "<pre>" . $menu->get_menu_html() . "</pŕe>";
?>
Category_ID是1,2,3,4 ..每个类别都有子菜单项。类别名称在另一个表中。因此，当显示时，它将显示为具有每个类别的树，然后显示在下面的子菜单项。
我知道这个问题听起来像是“为我做功课”，但我花了2个小时试图修改代码使其工作，但无济于事。我对PHP的数组和相关语法有点新，所以我觉得很难。
提前致谢！
答案 0 :(得分：1)
如果我没有错，原始代码中的parent_id指向同一个表的id，在你的情况下，它是某个其他表的id。为了使用相同的代码，您必须修改表的结构。
答案 1 :(得分：0)
function topMenu() {
global $MySQLi;
$query = "SELECT * FROM `grp_menuitems` WHERE `hidden` = '0' AND `parent` = '0' ORDER BY `order`";
$commit = $MySQLi->query($query);
if($commit === false) {
header("Location: error?code=01SET");
die();
}
else
{
while($row = $commit->fetch_assoc()) {
if($_SERVER['PHP_SELF'] == $row['link']) {
echo '<li class="current_page_item"><a href="'.$row['link'].'">'.$row['title'].'</a>';
}
else
{
echo '<li><a href="'.$row['link'].'">'.$row['title'].'</a>';
}
$this->topMenuChildren($row['id']);
echo '</li>';
}
}
}
function topMenuChildren($parent) {
global $MySQLi;
$query = "SELECT * FROM `grp_menuitems` WHERE `hidden` = '0' AND `parent` = '".$parent."' ORDER BY `order`";
$commit = $MySQLi->query($query);
if($commit === false) {
header("Location: error?code=01SET");
die();
}
else
{
if($commit->num_rows > 0) {
echo '<ul>';
while($row = $commit->fetch_assoc()) {
echo '<li><a href="'.$row['link'].'">'.$row['title'].'</a>';
$this->topMenuChildren($row['id']);
echo '</li>';
}
echo '</ul>';
}
}
}
这是我的功能。但是，我使用order而不是position作为列。根据需要进行调整。 ：）
只需致电topMenu();，其余部分通过PHP完成。我知道它与您的代码结构有点不同，但您似乎拥有能够分析并获得想法的知识。