php 多级导航显示

ty9919

　　写一次,想一次...重新做一次...  这回就放这了..以后用直接过来copy.


第一段代码


得到要显示的类别.


一级目录放在categories[0],


二级目录放在categories[1],


三级目录放在categories[2],


....以此类推


不过一般最多到3级就不再往下分了.

$cpath = array();
if(!empty($_REQUEST["parentId"])){
//category path
//get the category path
//put current category id in $cpath
$current_category["parentId"] = $_REQUEST["parentId"];
// put parent category id in $cpath
do{
array_unshift($cpath,$current_category["parentId"]);
$data_category = array(
"id" => $current_category["parentId"]
);
$current_category = array();
$current_category = pos($db_conn->search($db_category,$data_category));
}while(!empty($current_category["parentId"]));
}
//add the first level category parentId
array_unshift($cpath,"null");
// get all categories
$categories_level_count = sizeof($cpath);
for($i=0;$i $cpath[$i]
);
//get first level categories
$categories[$i] = $db_conn->search($db_category,$data_category);
//echo $db_category->search($data_category)."";
}
　　





第二段代码是将菜单以

<ul>
 <li>
<ul>
...
</ul>
 </li>
</ul>
　　



的形式显示菜单

function show_left_navigation($i){
global $categories,$cpath;
if(empty($categories[$i]))
return;
echo '<ul>';
foreach($categories[$i] as $id=>$category){
echo '';
if($id==end($cpath))
echo '<a href="advancedSearch.php?parentId='.$id.'">'.$category["name"].'</a>';
else
echo '<a href="advancedSearch.php?parentId='.$id.'">'.$category["name"].'</a>';
if(in_array($id,$cpath))
show_left_navigation($i+1);
echo '';
}
echo '</ul>';
}
show_left_navigation(0);