Question

为了构建痕迹导航菜单，我需要将数组$exampleBreadcrumbMenu转换为$exampleFlatArray的形式。

基本上我需要在每条路径之后尽可能地遍历$exampleBreadcrumbMenu，为每个菜单项构建一个数组项，并为我找到的每个菜单项创建$exampleFlatArray中的信息。

我的递归工作得很好，所以我可以处理树结构中的每个项目，但无法弄清楚如何为每个项目维护正确的级别编号。

主要代码位于$page->remap_breadcrumbmenu_to_flat_array()下方的主要功能中。

   $exampleBreadcrumbMenu = ['Home' =>
        [
            'Projects' => [
                'Create Project',
                'View Project',
                'Delete Project',
                'Export Project',
                ['Advanced' => [
                        'Upgrade',
                        'Downgrade'
                    ]
                ]
            ],
            'Employees' => [
                'Create Employee',
                'View Employee',
                'Delete Employee',
                'Export Employee',
                ['Advanced' => [
                        'Upgrade',
                        'Downgrade'
                    ]
                ]
            ],
            'Settings' => [
                ['Front End' => [
                        'CSS',
                        'HTML',
                        'Colors'
                    ]
                ],
                ['Back End' => [
                        'Database',
                        'PHP',
                        'Colors'
                    ]
                ]
            ],
            'About',
            'Help'
        ]
    ];

    $exampleFlatArray = [
        ['home' => [
                'level' => 0,
                'title' => 'Home',
                'prelinks' => [],
                'sublinks' => [
                    ['projects' => 'Projects'],
                    ['employees' => 'Employees'],
                    ['settings' => 'Settings']
                ]
            ]
        ],
        ['projects' => [
                'level' => 1,
                'title' => 'Projects',
                'prelinks' => [
                    ['home' => 'Home']
                ],
                'sublinks' => [
                    ['createProject' => 'Create Project'],
                    ['viewProject' => 'View Project'],
                    ['deleteProject' => 'Delete Project'],
                    ['exportProject' => 'Export Project'],
                    ['advanced' => 'Advanced']
                ]
            ]
        ],
        etc.,
        etc.,
    ];

这是我到目前为止所拥有的：

public function remap_breadcrumbmenu_to_flat_array($breadcrumbMenu, $key = '', $level = 0) {
    $flatArray = [];
    if (is_array($breadcrumbMenu)) {
        $key = $key == '' ? 'Home' : $key;
        echo 'MENU>>>>>>>>>>>>>>>>> ' . $key . ' (' . $level . ')<br/>';
        if (count($breadcrumbMenu) > 0) {
            foreach ($breadcrumbMenu as $key => $breadcrumbItem) {
                $this->remap_breadcrumbmenu_to_flat_array($breadcrumbItem, $key, ++$level);
            }
        }
    } else {
        if(is_string($breadcrumbMenu)) {
            echo $breadcrumbMenu . ' (' . $level . ')<br/>';
        }
    }
}

递归似乎工作正常，但水平不对：

MENU>>>>>>>>>>>>>>>>> Home (0)
MENU>>>>>>>>>>>>>>>>> Projects (1)
Create Project (2)
View Project (3)
Delete Project (4)
Export Project (5)
MENU>>>>>>>>>>>>>>>>> Advanced (6)
Upgrade (7)
Downgrade (8)
MENU>>>>>>>>>>>>>>>>> Employees (2)
Create Employee (3)
View Employee (4)
Delete Employee (5)
Export Employee (6)
MENU>>>>>>>>>>>>>>>>> Advanced (7)
Upgrade (8)
Downgrade (9)
MENU>>>>>>>>>>>>>>>>> Settings (3)
MENU>>>>>>>>>>>>>>>>> Front End (4)
CSS (5)
HTML (6)
Colors (7)
MENU>>>>>>>>>>>>>>>>> Back End (5)
Database (6)
PHP (7)
Colors (8)
About (4)
Help (5)

Answer 1

不要使用++$level，因为它还会增加当前级别范围内的局部变量，这意味着您的$level循环的每次迭代都会增加foreach在同一范围内。将$level + 1传递给递归调用。

在递归映射树结构数组时如何跟踪级别？

1 个答案: