如何获取平面 JSON 文件并使用 PHP 构建分层菜单

Question

我有一个包含菜单列表 link 的数据库。每个菜单 link 在字段 'menu_pages_id' 中都有一个 ID。

在数据库中有一个字段“subPageOf”，说明它的父项是什么。还有三种不同的菜单link，定义在字段“menuType”

中

我已将此列表输出到一个平面 JSON 文件中，并希望重建层次结构。

$jsonMenu = json_decode($jsonMenu);
foreach ($jsonMenu as $pageInfo ) {
    $pageUrl = $pageInfo->pageUrl;
    $menuPageName = $pageInfo->pageName;
    $menuType = $pageInfo->menuType;
    $subPageOf = $pageInfo->subPageOf;
    $menu_pages_id = $pageInfo->menu_pages_id;
    
    if( $menuType == 'header' &&  $subPageOf == '0' ){
        $headerMenu .= "<a href='$pageUrl'>$menuPageName</a>"; 
    }
    
    if( $menuType == 'category' &&  $subPageOf == '0'){
        $categoryMenu .= "<li><a href='$pageUrl'>$menuPageName</a></li>";
    }
    
    if( $menuType == 'footer' &&  $subPageOf == '0' ){
        $footerMenu .= "<a href='$pageUrl'>$menuPageName</a>"; 
    } 
}

$categoryMenu = '<ul>'.$categoryMenu.'</ul>';
echo $headerMenu
echo $categoryMenu
echo $footerMenu

这当然会输出第一级...但是如何将子页面嵌套到类别菜单的父级的

中。

我可以在

元素中放置另一个完整的 foreach 循环，然后运行它再次过滤父 ID。但这意味着我必须对要搜索的深度进行硬编码，而且看起来有很多额外的代码。我希望有一个更优雅的解决方案。

这是一个例子Json菜单

[{"menu_pages_id":"77","menu_id":"1","page_id":"1","listOrder":"0","subPageOf":"0","pageName":"Home","pageUrl":"home","pageType":"system","isProtected":"1","customerGroup":"1001","menuName":"Header Menu","menuType":"header","assignedGroup_id":"1","menuStatus":"Active"},{"menu_pages_id":"78","menu_id":"1","page_id":"14","listOrder":"0","subPageOf":"0","pageName":"About Us","pageUrl":"aboutus","pageType":"content","isProtected":"0","customerGroup":"1001","menuName":"Header Menu","menuType":"header","assignedGroup_id":"1","menuStatus":"Active"},{"menu_pages_id":"80","menu_id":"1","page_id":"6","listOrder":"0","subPageOf":"0","pageName":"Register","pageUrl":"register","pageType":"system","isProtected":"1","customerGroup":"1004","menuName":"Header Menu","menuType":"header","assignedGroup_id":"1","menuStatus":"Active"},{"menu_pages_id":"81","menu_id":"1","page_id":"7","listOrder":"0","subPageOf":"0","pageName":"Your Account","pageUrl":"account","pageType":"system","isProtected":"1","customerGroup":"1003","menuName":"Header Menu","menuType":"header","assignedGroup_id":"1","menuStatus":"Active"},{"menu_pages_id":"82","menu_id":"1","page_id":"9","listOrder":"0","subPageOf":"0","pageName":"Logout","pageUrl":"logout","pageType":"system","isProtected":"1","customerGroup":"1003","menuName":"Header Menu","menuType":"header","assignedGroup_id":"1","menuStatus":"Active"},{"menu_pages_id":"83","menu_id":"2","page_id":"15","listOrder":"0","subPageOf":"0","pageName":"Terms and Conditions","pageUrl":"terms-and-conditions","pageType":"content","isProtected":"0","customerGroup":"1001","menuName":"Footer","menuType":"footer","assignedGroup_id":"1","menuStatus":"Active"},{"menu_pages_id":"84","menu_id":"2","page_id":"44","listOrder":"0","subPageOf":"0","pageName":"Wholesale","pageUrl":"wholesale","pageType":"content","isProtected":"0","customerGroup":"1005, 1007","menuName":"Footer","menuType":"footer","assignedGroup_id":"1","menuStatus":"Active"},{"menu_pages_id":"97","menu_id":"24","page_id":"1","listOrder":"0","subPageOf":"0","pageName":"Home","pageUrl":"home","pageType":"system","isProtected":"1","customerGroup":"1001","menuName":"Test Menu","menuType":"category","assignedGroup_id":"3","menuStatus":"Active"},{"menu_pages_id":"98","menu_id":"24","page_id":"14","listOrder":"0","subPageOf":"0","pageName":"About Us","pageUrl":"aboutus","pageType":"content","isProtected":"0","customerGroup":"1001","menuName":"Test Menu","menuType":"category","assignedGroup_id":"3","menuStatus":"Active"},{"menu_pages_id":"99","menu_id":"24","page_id":"5","listOrder":"0","subPageOf":"97","pageName":"Login","pageUrl":"login","pageType":"system","isProtected":"1","customerGroup":"1004","menuName":"Test Menu","menuType":"category","assignedGroup_id":"3","menuStatus":"Active"},{"menu_pages_id":"100","menu_id":"24","page_id":"3","listOrder":"0","subPageOf":"99","pageName":"Support","pageUrl":"support","pageType":"system","isProtected":"1","customerGroup":"1001","menuName":"Test Menu","menuType":"category","assignedGroup_id":"3","menuStatus":"Active"},{"menu_pages_id":"101","menu_id":"24","page_id":"15","listOrder":"0","subPageOf":"0","pageName":"Terms and Conditions","pageUrl":"terms-and-conditions","pageType":"content","isProtected":"0","customerGroup":"1001","menuName":"Test Menu","menuType":"category","assignedGroup_id":"3","menuStatus":"Active"},{"menu_pages_id":"79","menu_id":"1","page_id":"5","listOrder":"3","subPageOf":"0","pageName":"Login","pageUrl":"login","pageType":"system","isProtected":"1","customerGroup":"1004","menuName":"Header Menu","menuType":"header","assignedGroup_id":"1","menuStatus":"Active"},{"menu_pages_id":"96","menu_id":"1","page_id":"44","listOrder":"8","subPageOf":"0","pageName":"Wholesale","pageUrl":"wholesale","pageType":"content","isProtected":"0","customerGroup":"1005, 1007","menuName":"Header Menu","menuType":"header","assignedGroup_id":"1","menuStatus":"Active"}]

Answer 1

我认为应该使用递归。基于下面粗略示例的一些代码应该可以工作：

$menus = "your flat menu array";

function getNestedMenu($menus,$subPageOf){
    $nestedMenus = array();
    foreach($menus as $menu){
        if($menu['subPageOf'] = $subPageOf){
            $nestedMenu = $menu;
            $nestedMenu['subPages'] = getNestedMenu($menus,$menu['page_id']);
            $nestedMenus[] = $nestedMenu;
        }
    }
    return $nestedMenus;
}

$myNestedMenus = getNestedMenu($menu,"0");

使用上面的代码，您还可以调整它以制作基于 ul li 的嵌套菜单 html 代码

Answer 2

根据 Kewlashu 所说的，我能够使用以下方法使其工作。

$jsonMenu = json_decode($menus);
function makeMenu($jsonMenu,$parentId) {
    $menu .=  "<ul>";
    foreach ($jsonMenu as $pageInfo ) {
        $menuCustomerGroup = $pageInfo->customerGroup;
        $pageUrl = $pageInfo->pageUrl;
        $menuPageName = $pageInfo->pageName;
        $menuType = $pageInfo->menuType;
        $subPageOf = $pageInfo->subPageOf;
        $menu_pages_id = $pageInfo->menu_pages_id;
        if($menuType == 'category' &&  $subPageOf == $parentId){
            $menu .= "<li><a href='$pageUrl'>$menuPageName</a>".makeMenu($jsonMenu,$menu_pages_id)."</li>";
        }   
    }
    $menu .= "</ul>";
    return $menu;    
} 

$menu = makeMenu($jsonMenu,0);
$menu = str_replace("<ul></ul>",'', $menu);
echo $menu;

这个解决方案在每个子菜单的底部留下了空的

元素，所以我在输出之前使用字符串替换来删除它们。

如何获取平面 JSON 文件并使用 PHP 构建分层菜单

How to take a flat JSON file and build a hierarchical menu using PHP

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