Yii2 recursion of the tree menu? - php

Question

Good night all! Help please in the recursion, where I made a mistake, I need to output the categories, as in the last example!
Model:
protected function buildTree($data, $rootID = 0)
{
$tree = [];
foreach ($data as $id => $node) {
if ($node->parent_id == $rootID) {
unset($data[$id]);
$node->childs = $this->buildTree($data, $node->id);
$tree[] = $node;
}
}
return $tree;
}
public function getTree()
{
$data = Category::find()->all();
return $this->buildTree($data);
}
View:
<?php $form = ActiveForm::begin()
foreach ($tree as $cat) {
echo '<br><div class="spoiler-title">' . $cat['title'] . '</div>';
printNode($cat);
}
function printNode($cat, $level = 1)
{
if (count($cat['childs']) > 0) {
foreach ($cat['childs'] as $child) {
for ($j = 1; $j < $level; $j++) {
echo '------- <b>';
}
echo '' . $child['title'] . '</b><br>';
//echo $form->field($model, $child['title'])->checkbox();
//I want to do a checkbox, get an error, do not understand $
//form and $ model
if (count($child['childs']) > 0) {
printNode($child, $level + 1);
}
}
}
}
$form = ActiveForm::end() ?>
That's how I get the tree, this is with your code
root
category
category
category
---- <b>subcategory</b
---- <b>subcategory</b
---- <b>subcategory</b
---- <b>subcategory</b
category
category
I need to make checkboxes in subcategories, but I get an error, in the code I wrote in the comments, your code works, but I can not change it my needs as a picture.

Answer 1

You should also add recursion in view when you print tree.
Try this in view:
$form = \yii\bootstrap\ActiveForm::begin();
foreach ($tree as $cat) {
printNode($cat);
}
function printNode($cat, $level = 1) {
echo '<br><div class="spoiler-title">' . $cat['title'] . '</div>';
if (count($cat['childs']) > 0) {
foreach ($cat['childs'] as $child) {
echo \yii\helpers\Html::checkbox('someName[]') . ' ' . $child['title'] . '<br>';
if (count($child['childs']) > 0) {
printNode($child, $level + 1);
}
}
}
}
\yii\bootstrap\ActiveForm::end();