Convert Array into Ul-Li

Question

i have an array like this

Array
(
    [0] => Array
        (
            [name] => Region
            [id] => 3
            [parent_id] => 2
            [children] => Array
                (
                    [0] => Array
                        (
                            [name] => Asia
                            [id] => 4
                            [parent_id] => 3
                            [children] => Array
                                (
                                    [0] => Array
                                        (
                                            [name] => Central Asia
                                            [id] => 6621
                                            [parent_id] => 4
                                            [children] => Array
                                                (
                                                    [0] => Array
                                                        (
                                                            [name] => Afghanistan
                                                            [id] => 5
                                                            [parent_id] => 6621
                                                            [children] => Array
                                                                (
                                                                    [0] => Array
                                                                        (
                                                                            [name] => Balkh
                                                                            [id] => 6
                                                                            [parent_id] => 5
                                                                            [children] => Array
                                                                                (
                                                                                    [0] => Array
                                                                                        (
                                                                                            [name] => Mazar-e-Sharif
                                                                                            [id] => 7
                                                                                            [parent_id] => 6
                                                                                        )

                                                                                )

                                                                        )

                                                                    [1] => Array
                                                                        (
                                                                            [name] => Kabol
                                                                            [id] => 10
                                                                            [parent_id] => 5
                                                                        )

                                                                    [2] => Array
                                                                        (
                                                                            [name] => Qandahar
                                                                            [id] => 12
                                                                            [parent_id] => 5
                                                                        )

                                                                )

                                                        )

                                                )

                                        )

                                    [1] => Array
                                        (
                                            [name] => Middle East
                                            [id] => 6625
                                            [parent_id] => 4
                                            [children] => Array
                                                (
                                                    [0] => Array
                                                        (
                                                            [name] => Armenia
                                                            [id] => 14
                                                            [parent_id] => 6625
                                                        )

                                                )

                                        )

                                )

                        )

                )

        )

)

now i want to convert this array in to ul-li in tree formate

but it is giving me weird output

for example Region i want like this

<li id=3 parent_id=2 > Region </li>

here i want use id and parent_id as attribute php function is

    function olLiTree($tree)
    {
        echo '<ul>';
        foreach($tree as $key => $item) {
            if (is_array($item)) {
                echo '<li>', $key;
                olLiTree($item);
                echo '</li>';
            } else {
                echo '<li>', $item, '</li>'; 
            }
        }
        echo '</ul>';
    }

output for region is like this from above function

<ul>
    <li>0
        <ul>
            <li>Region</li>
            <li>3</li>
            <li>2</li>
            <li>children
                <ul>

Answer 1

Perhaps this is recursion you seek.

function olLiTree( $tree ) {
    echo '<ul>';
    foreach ( $tree as $item ) {
        echo "<li id=\"$item[id]\" parent_id=\"$item[parent_id]\" > $item[name] </li>";
        if ( isset( $item['children'] ) ) {
            olLiTree( $item['children'] );
        }
    }
    echo '</ul>';
}

Answer 2

I think this one is correct:

function olLiTree($tree) {
    echo "<ul>";
    foreach ($tree as $v) {
        echo "<li id='{$v['id']}' parent_id='{$v['parent_id']}'>{$v['name']}</li>";
        if ($v['children'])
            olLiTree($v['children']);
    }
    echo "</ul>";
}

Output:

Region
Asia
Central Asia
Afghanistan
Balkh
Mazar-e-Sharif
KabolQandahar
Middle East
Armenia