PHP 将 ul 平均分成 3 列 Joomla 菜单模块

Question

我目前正在创建一个 joomla 菜单模块，但我遇到了一些问题..

我正在尝试将子菜单项分成 3 列，目前我正在使用:

$counter = 0;

if($item->level == 2):
    $counter += count($item);
endif;

if($item->level == 1):
    $counter = 0;
endif;

if($counter%3 == 0 && $item->level == 2){
        echo '</ul><ul class="col-lg-3">';
    }

但这只是将它们分成 3 组

这是整个 default.php:

<?php

// No direct access
defined('_JEXEC') or die;

// Note. It is important to remove spaces between elements.
$counter = 0;

?>

<ul class="nav navbar-nav <?php echo $class_sfx; ?>  nav-mega"<?php
$tag = '';
if ($params->get('tag_id') != null)
{
    $tag = $params->get('tag_id') . '';
    echo ' id="' . $tag . '"';
}
?>>

<?php
    foreach ($list as $i => &$item) {

        if($item->level == 2):
            $counter += count($item);
        endif;

        if($item->level == 1):
            $counter = 0;
        endif;

        $class = 'item-' . $item->id;
        if ($item->id == $active_id) {
            $class .= ' current';
        }

        if (in_array($item->id, $path)){
            $class .= ' active';
        }elseif ($item->type == 'alias'){
            $aliasToId = $item->params->get('aliasoptions');
            if (count($path) > 0 && $aliasToId == $path[count($path) - 1]) {
                $class .= ' active';
            }elseif (in_array($aliasToId, $path)){
                $class .= ' alias-parent-active';
            }
        }

        if ($item->deeper){
            $class .= ' deeper dropdown';
        }

        if ($item->parent){
            $class .= ' parent';
        }

        if (!empty($class)){
            $class = ' class="' . trim($class) . '"';
        }

        echo '<li' . $class . '>';

        // Render the menu item.
        switch ($item->type){
            case 'separator':
            case 'url':
            case 'component':
                require JModuleHelper::getLayoutPath('mod_blogmenu', 'default_' . $item->type);
            break;

            default:
                require JModuleHelper::getLayoutPath('mod_blogmenu', 'default_url');
            break;
        }

        // The next item is deeper.
        if($counter%3 == 0 && $item->level == 2){
            echo '</ul><ul class="col-lg-3">';
        }

        if ($item->deeper){
            echo '<div class="dropdown-menu mega-dropdown">';
            echo '<div class="mega-image col-lg-3 thumbnail visible-md visible-lg"><img src="'.$item->menu_image.'" /></div>';
            echo '<ul class="col-lg-3">';
        }
                // The next item is shallower.
        elseif ($item->shallower){

            echo str_repeat('</ul><div class="mega-caption"></div></div>', $item->level_diff);
        }
                // The next item is on the same level.
        else {
            //echo '</li>';
        }
    }

?>
</ul>

抱歉了很多代码；我仍在努力学习 PHP 并努力理解 Joomla 的做事方式，这对我来说并不容易。

Answer 1

在循环遍历所有菜单项之前，计算每个菜单项的所有子菜单项。(免责声明:我不了解 Joomla 菜单，但我希望 $item->parent->id 引用父项的 id。)

$submenuItemsTotals = array();
foreach ($list as $i => &$item) { 
   if ($item->level == 2) {
       if (!isset($submenuItemsTotal[$item->parent->id])) {
          $submenuItemsTotal[$item->parent->id] = 1;
       } else {
          $submenuItemsTotal[$item->parent->id]++;
       }
   }
}

$itemsPerColumn = array();
foreach ($submenuItemsTotals as $parentId => $submenuItemsTotal) {
   $itemsPerColumn[$parentId] = ceil($submenuItemsTotal / 3); 
}


// Here comes your existing code with a small change

foreach ($list as $i => &$item) { 
    [your code....]

    // The next item is deeper.
    if($item->level == 2 && ($counter % $itemsPerColumn[$item->parent->id]) == 0){
        echo '</ul><ul class="col-lg-3">';
    }

    [your code....]
}