Replicating Twig's functionally isn't always easy in native PHP. A compiled language (like Twig) has the advantage of full visibility of an entire template before rendering it. Native PHP (like Plates) on the other hand have to be creative with output buffering and includes, and the order becomes important.

In this case the layout (parent) template is rendered after the current template, meaning its content isn't available to the current template, and generally this is a good thing.

You can however still get this sort of functionality with Plates. Here's how:

The layout template

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title><?=$this->title?></title>
</head>

<body>

<div id="content">
    <?=$this->content?>
</div>

<?php if (isset($this->sidebar)): ?>

    <div id="sidebar">

        <?=$this->sidebar?>

        <?php if (isset($this->showSidebarDefault) and $this->showSidebarDefault === true): ?>
            <p>Some default sidebar content</p>
        <?php endif ?>

    </div>

<?php endif ?>

</body>
</html>

The page template

<?php $this->layout('template') ?>

<?php $this->title = 'User Profile' ?>

<?php $this->start('content') ?>
    <h1>Welcome!</h1>
    <p>Welcome, <?=$this->e($this->name)?></p>
<?php $this->end() ?>

<?php $this->start('sidebar') ?>
    <ul>
        <li><a href="/link">Example Link</a></li>
        <li><a href="/link">Example Link</a></li>
        <li><a href="/link">Example Link</a></li>
        <li><a href="/link">Example Link</a></li>
        <li><a href="/link">Example Link</a></li>
    </ul>

    <?php $this->showSidebarDefault = true ?>

<?php $this->end() ?>

Add 'parent' method #1

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