How to convert array to treeview in php

Below is my array

Array
(
    [0] => Array
        (
            [efi] => Array
                (
                )
        )
    [1] => Array
        (
            [grub] => Array
                (
                    [0] => Array
                        (
                            [fonts] => Array
                                (
                                )
                        )
                    [1] => Array
                        (
                            [i386-pc] => Array
                                (
                                )
                        )
                    [2] => Array
                        (
                            [locale] => Array
                                (
                                )
                        )
                    [3] => Array
                        (
                            [x86_64-efi] => Array
                                (
                                )
                        )
                )
        )
)

I want output as treeview

efi
grub

and under grub I want

fonts
i386-pc
locale
x86_64-efi

I have used below code for same

function generateTreeMenu($dir_array, $parent = 0, $limit=0){
            if($limit > 1000) return '';
            $tree = '';
            $tree = '<ul>';
            for($i=0, $ni=count($dir_array); $i < $ni; $i++){
                if($dir_array[$i]['parent_id'] == $parent){
                    $tree .= '<li><a>';
                    $tree .= $dir_array[$i]['title'].'</a>';
                    $tree .= generatePageTree($dir_array, $dir_array[$i]['id'], $limit++);
                    $tree .= '</li>';
                }
            }
            $tree .= '</ul>';
            return $tree;
}

generateTreeMenu($dir_array);

it show warning Undefined property: stdClass::$parent_id in

初学者，请大神告知 下面这段代码是定义一个函数吗？“ (EFIAPI *EFI_SET_FRB_TIMER) ”是什么意思？

hahahalbx

3个回复

初学者，请大神告知下面这段代码是定义一个函数吗？“ (EFIAPI *EFI_SET_FRB_TIMER) ”是什么意思？