php 多级领航显示

php 多级导航显示

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);

?

?