Create Menu by array using recursion and save array in text file

Create Menu by array using recursion and save array in text file

<?php
$menuItems = array
(
    1 => array
    (
        'ItemText' => 'Home',
        'ItemLink' => 'index.php',
        'ParentID' => null,
    ),

    2 => array
    (
        'ItemText' => 'Home Sub 1',
        'ItemLink' => 'somepage.php',
        'ParentID' => 1,
    ),

    3 => array
    (
        'ItemText' => 'Home Sub 2',
        'ItemLink' => 'somepage2.php',
        'ParentID' => 1,
    ),

    4 => array
    (
        'ItemText' => 'Contact',
        'ItemLink' => 'contact.php',
        'ParentID' => null,
    ),
    5 => array
    (
        'ItemText' => 'Home Sub Sub 1',
        'ItemLink' => 'contact.php',
        'ParentID' => 2,
    ),
    6 => array
    (
        'ItemText' => 'Home Sub Sub 2',
        'ItemLink' => 'contact.php',
        'ParentID' => 2,
    ),
    7 => array
    (
        'ItemText' => 'Contact',
        'ItemLink' => 'contact.php',
        'ParentID' => 6,
    ),
    8 => array
    (
        'ItemText' => 'Home Sub Sub 1',
        'ItemLink' => 'contact.php',
        'ParentID' => 6,
    ),
    9 => array
    (
        'ItemText' => 'Home Sub Sub 2',
        'ItemLink' => 'contact.php',
        'ParentID' => 6,
    ),
10 => array
    (
        'ItemText' => 'Home Sub Sub 2',
        'ItemLink' => 'contact.php',
        'ParentID' => 9,
    ),
   
);

// Each node starts with 0 children
foreach ($menuItems as &$menuItem)
    $menuItem['Children'] = array();

// If menu item has ParentID, add it to parent's Children array  
foreach ($menuItems as $ID => &$menuItem)
{
    if ($menuItem['ParentID'] != null)
        $menuItems[$menuItem['ParentID']]['Children'][$ID] = &$menuItem;
}

// Remove children from $menuItems so only top level items remain
foreach (array_keys($menuItems) as $ID)
{
    if ($menuItems[$ID]['ParentID'] != null)
        unset($menuItems[$ID]);
}
/*
echo "<pre>";
print_r($menuItems);

$serializedData = serialize($menuItems); //where '$array' is your array
file_put_contents('your_file_name.txt', $serializedData);

//at a later point, you can convert it back to array like
$recoveredData = file_get_contents('your_file_name.txt');
$recoveredArray = unserialize($recoveredData);

// you can print your array like
print_r($recoveredArray);
*/
echo drawMenu ($menuItems);


function drawMenu ($menuItems) {
    echo "<ul>";
    foreach ($menuItems as $item) {
        echo "<li><a href='". $item['ItemLink']."'>" . $item['ItemText']."</a>";
        if ($item['Children']) {
            drawMenu($item['Children']); // here is the recursion
        }
        echo "</li>";
    }
    echo "</ul>";
}



?>