Create a menu list dynamically from php array with subelements

Question

I have a PHP array with menu items and submenu items. The submenu items are set with a parent ID and depth. An example array looks like this:

[0] => stdClass Object ( [CategoryID] => 4 [ParentCategoryID] => -1 [Depth] => 1 [Name] => Menu1
[1] => stdClass Object ( [CategoryID] => 2 [ParentCategoryID] => 4 [Depth] => 2 [Name] => Submenu1 
[2] => stdClass Object ( [CategoryID] => 3 [ParentCategoryID] => 4 [Depth] => 2 [Name] => Submenu2 
[3] => stdClass Object ( [CategoryID] => 1 [ParentCategoryID] => -1 [Depth] => 1 [Name] => Menu2

Now I want to have the array output as a list and sublist like this:

<ul>
    <li>
        Menu1
        <ul>
            <li>Submenu1</li>
            <li>Submenu2</li>
        <ul>
    </li>
    <li>
        Menu2
    </li>
<ul>

I was not able to get those submenus to the parent element. Is there any way to do this in an easy way?

Possible duplicate of Sort an array with PHP to generate a multilevel menu listing — Abhijit Saxena
– Abhijit Saxena, Commented Apr 9, 2019 at 9:13
can you have for example a categrorie that the ParentCategoryID is 4 ? — Yassine CHABLI
– Yassine CHABLI, Commented Apr 9, 2019 at 9:21

Rahul · Accepted Answer · 2019-04-09 09:39:03Z

1

You can loop your array $a like this,

echo "<ul>";
foreach ($a as $k => $v) {
    // assuming depth = 1 is only for parent categories
    if ($v->Depth == 1) {
        echo "<li>";
        echo $v->Name;
        echo "<ul>";
        foreach ($a as $k1 => $v1) {
            // checking inner loops parent category with outer loop's category id
            if ($v1->ParentCategoryID == $v->CategoryID) { 
                echo "<li>";
                echo $v1->Name;
                echo "</li>";
            }
        }
        echo "</ul>";
        echo "</li>";
    }
}
echo "</ul>";

Try running in PHP script.

edited Apr 9, 2019 at 9:39

answered Apr 9, 2019 at 9:24

Rahul

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