所以,如果我有这个列表:
1. item
2. item
2.1. item
2.2. item
2.2.1. item
2.2.2. item
2.2.3. item
2.3. item
2.4. item
2.4.1. item
2.4.2. item
3. item
4. item
4.1. item
4.2. item
4.2.1. item
4.2.2. item
5. item
如果当前列表项是"2.",那么列表应该如下所示:
1. item
2. item // this needs class .selected
2.1. item
2.2. item
2.3. item
2.4. item
3. item
4. item
5. item
如果当前列表项是"2.2.",则列表应如下所示:
1. item
2. item // this needs class .selected
2.1. item
2.2. item // this needs class .selected
2.2.1. item
2.2.2. item
2.2.3. item
2.3. item
2.4. item
3. item
4. item
5. item
下面是一个对我来说运作良好的示例代码,能够显示完整的树形结构。我还添加了lft/rgt/current,这将有助于解决我的问题。
<?php
function MyRenderTree ( $tree = array(array('name'=>'','depth'=>'', 'lft'=>'','rgt'=>'')) , $current=false){
$current_depth = 0;
$counter = 0;
$result = '<ul>';
foreach($tree as $node){
$node_depth = $node['depth'];
$node_name = $node['name'];
$node_id = $node['category_id'];
if($node_depth == $current_depth){
if($counter > 0) $result .= '</li>';
}
elseif($node_depth > $current_depth){
$result .= '<ul>';
$current_depth = $current_depth + ($node_depth - $current_depth);
}
elseif($node_depth < $current_depth){
$result .= str_repeat('</li></ul>',$current_depth - $node_depth).'</li>';
$current_depth = $current_depth - ($current_depth - $node_depth);
}
$result .= '<li id="c'.$node_id.'"';
$result .= $node_depth < 2 ?' class="open"':'';
$result .= '><a href="#">'.$node_name.'</a>';
++$counter;
}
$result .= str_repeat('</li></ul>',$node_depth).'</li>';
$result .= '</ul>';
return $result;
}
// "$current" may contain category_id, lft, rgt for active list item
print MyRenderTree($categories,$current);
?>