Parents and subpages

Check if a page has children (subpages)

<?php
    // The variable $page is an Page-Object
    if ($page->hasChildren()) {
        echo 'The page has children';
    } else {
        echo 'The page does not have children';
    }
?>

List all children of a page

<?php
    // The variable $page is an Page-Object
    $children = $page->children();

    // Each child is a Page-Object
    foreach ($children as $child) {
        echo $child->title();
    }
?>

Check if a page is a child (has a parent)

<?php
    // The variable $page is an Page-Object
    if ($page->isChild()) {
        echo 'The page is a child';
    } else {
        echo 'The page is not a child';
    }
?>

Print the title of the parent page from the child

If a page has a child, you can call the methods of the parent page with parentMethod().

<?php
    // The variable $page is an Page-Object
    if ($page->isChild()) {
        echo 'Title of the parent page: ' . $page->parentMethod('title');
    } else {
        echo 'The page is not child';
    }
?>

Print a Navigation Bar

A parent page might or may not have children.

<?php
    // Get the list of parent pages
    $parents = buildParentPages();

    foreach ($parents as $parent) {
        echo $parent->title();

        // Check if the page has children
        if ($parent->hasChildren()) {
            // Get the list of children
            $children = $parent->children();

            foreach ($children as $child) {
                echo " > " . $child->title();
            }
        }
    }
?>