I Built a Full-Blown PHP Template Engine Faster Than I Expected (Because Escaping Kept Betraying Me)

“It Works” Is Not the Same as “It Composes”

Most template engines solve the baseline problems:

• basic variable escaping,
• loops/conditions,
• includes,
• inheritance.

Great. Necessary. Table stakes.

But real projects don’t live in tutorial mode. They live in:

• x-data attributes with JSON-like payloads,
• partials that need scoped variables,
• reusable components that must merge attributes sanely,
• inheritance rules that shouldn’t produce spooky wrapper behavior.

When these pieces collide, many template layers start leaking abstraction. You end up writing little “safe output rituals” everywhere, and each ritual is a tiny tax on readability and confidence.

The Alpine Pain Point (a.k.a. The Escaping Tax)

Here’s a pattern many of us use:

<div x-data="{ open: false, user: ... }"></div>

Now inject dynamic data and things get interesting fast.

<div x-data="{ user: '<?= $userName ?>', prefs: <?= json_encode($prefs) ?> }"></div>

<div x-data="{ user: <?= $userName ?>, prefs: <?= $prefs |> json() ?> }"></div>

A Side Note on SSR and “Old School” Thinking

I’ll admit it: I’m a bit old school. I still firmly believe server-side rendering has a place — a big one — and that the industry’s full-SPA-everything instinct of the last decade overcorrected harder than it needed to.

That said, I’m not anti-JavaScript. Far from it. What JS frameworks got right — and what I genuinely admire — is the directive-style approach. v-if, x-show, @click, x-data — these are elegant. They keep behavior close to the markup without turning your HTML into an unreadable component soup. They’re declarative without being alienating.

Sugar’s s:if, s:foreach, s:class are a direct acknowledgment of that influence. The pattern works because it respects the structure of the document. It felt wrong not to bring that same rhythm to the server-rendered world.

So: SSR with directive-style ergonomics, sprinkling Alpine where interactivity is actually needed. That’s a stack I can still feel good about in 2026. ## Why I Didn’t Just “Use Less PHP”

I’ve seen this issue across plain PHP stacks and framework-heavy projects alike. Whether it’s Twig in Drupal, Blade-like patterns, or custom rendering layers, the pain point is the same: real-world attribute composition collides with escaping edge cases and front-end behavior.

Not business logic spaghetti. Not accidental side effects. Just practical rendering logic where it belongs.

There’s a recurring internet argument that template languages should ban “too much PHP” for purity reasons. My position is opinionated and simple:

• PHP in templates should be allowed.
• Abuse should be discouraged by design and conventions.
• Restriction should be optional, not mandatory dogma.

You can build a clean view layer without pretending PHP is radioactive.

Two Different Template Use Cases People Keep Mixing Up

This matters a lot.

1. Application templates (your team writes them).
2. User-authored templates (your users write them, e.g. Liquid-like scenarios).

These are not the same risk profile.

For application templates, full PHP capability is often a productivity multiplier when paired with code review and team discipline.

For user-authored templates, sandboxing and restricted DSLs are essential.

Trying to force one model onto both scenarios creates bad tooling for everyone.

Sugar is intentionally designed for developer-authored templates first.

Your Editor Isn’t Blind Anymore

This is one that rarely gets talked about enough: native editor support.

With Twig, Latte, or most compiled DSL-based engines, your editor sees an alien language. Variable types? Unknown. Autocompletion on method calls? Gone. PHPStan or Psalm catching a typo in a template expression? Not a chance.

Because Sugar templates are just PHP files — <?= $var ?> is real PHP — your editor treats them exactly as such. PhpStorm, VS Code with Intelephense, whatever your setup is: you get full type hinting, autocompletion, go-to-definition, and static analysis on your template code out of the box.

Is it perfect? Not entirely. Directive attributes like s:foreach or s:if are not (yet?) IDE-aware at the directive level, so those expressions don’t get the same treatment. But the PHP expressions inside your templates — the parts that actually produce output — are fully visible to your toolchain. That alone is a huge quality-of-life improvement over a black-box DSL.

Sugar uses directive-style attributes (s:*) to keep structure familiar while adding expressive power:

<s-template s:extends="../layouts/base.sugar.php"></s-template>

<title s:block="title">Posts</title>

<main s:block="content">
	<h1>Latest posts</h1>
	<ul>
		<li s:foreach="$posts as $post">
			<a href="/posts/<?= $post->slug ?>"><?= $post->title ?></a>
		</li>
	</ul>
</main>

You keep HTML shape, add behavior where needed, and avoid learning an entirely separate mini-language for every basic control structure.

Explicit Block Semantics

Sugar makes block behavior explicit via s:block, s:append, s:prepend, and s:parent.

<!-- layouts/base.sugar.php -->
<main s:block="content">
	<p>Default content</p>
</main>

<!-- pages/home.sugar.php -->
<s-template s:extends="../layouts/base.sugar.php"></s-template>

<s-template s:block="content">
	<s-template s:parent />
	<section class="welcome">
		<h1>Dashboard</h1>
	</section>
</s-template>

Why this helps:

• parent placement is explicit,
• intent is local and reviewable,
• no magic comments or undocumented order rules.

Component Example

<!-- components/s-alert.sugar.php -->
<?php
$variant ??= 'info';
?>

<article class="alert" s:class="['alert--danger' => $variant === 'danger']">
	<h3 s:slot="title">Notice</h3>
	<div s:slot>
		<?= $slot ?>
	</div>
</article>

Usage:

<s-alert s:bind="['variant' => 'danger']" class="mb-4" x-data="{ dismissed: false }">
	<h4 s:slot="title">Deploy failed</h4>
	Rollback started. Check queue workers.
</s-alert>

What’s happening and why it matters:

• s:bind passes typed intent (props), not random attributes.
• non-prop attributes (like class, x-data) merge onto the root element.
• slots keep semantic control with caller-defined markup.

This is the sweet spot: powerful enough for production UI, simple enough to read at 2AM.

The Wrong Way: Bypass First, Ask Questions Later

<div><?= $commentBody |> raw() ?></div>

If $commentBody contains user input, this is a security incident waiting for a calendar invite.

The Right Way: Default Safe, Override Rarely

<div><?= $commentBody ?></div>

Sugar escapes according to context automatically.

Only use raw output for trusted, pre-sanitized HTML (e.g., content filtered server-side by a strict sanitizer you control and test).

When you need structured data for JavaScript or Alpine usage:

<script>
	const payload = <?= $payload |> json() ?>;
</script>

<div x-data="{ data: <?= $payload |> json() ?> }"></div>

This gives you data transport without punching holes through your escape model.