README

Native PHP templating — no compilation step, no new syntax, no cache directory. A template is a plain .php file; the engine gives it Twig-style inheritance and escape-by-convention safety while staying ordinary PHP you can read top to bottom.

The seam

Controllers depend on Contracts\ViewInterface, never on the engine, so the template engine is an application choice — bind a Twig adapter in its place and no controller changes. The shipped implementation is PhpView.

use Hydra\View\PhpView;

$view = new PhpView(__DIR__ . '/views');
echo $view->render('home', ['name' => 'Will']);

Inside a template

The $this a template sees is a per-render Template, so nested partials and layout chains never stomp each other's state. The vocabulary:

$this->e($value) — escape for HTML. Escaping is by convention, not by default: templates are ordinary PHP, so a bare <?= $x ?> emits raw output — always route dynamic values through e(). Within e(), every value is treated as untrusted; the only way to emit raw markup through it is to wrap the value in HtmlView, so forgetting the HtmlView mark can only ever over-escape. Forgetting e() itself, however, under-escapes — that discipline is on the template author.
$this->extends('layouts/base') — wrap this template in a layout. The child's leftover output becomes the layout's content section. Chains to any depth.
$this->start('title') … $this->stop() / $this->section('title', $default) — capture and yield named sections.
$this->partial('card', [...]) — render another template inline as its own independent chain (inherits none of the parent's data; a stray extends() inside is ignored).
$this->siteUrl('/blog') — build an absolute URL for canonical / Open Graph tags (see below).
$this->csrf() / $this->csrfToken() — emit the session CSRF token (see below).

Full page vs. htmx fragment, one template

render($t, $data, layout: false) returns the template's own body and ignores its extends(). That's how a single template serves both a full page (layout on) and an htmx fragment (layout off) off one route — the inheritance is resolved by output buffering, so the fragment path simply doesn't walk the chain.

CSRF (optional)

PhpView's second argument is an optional Hydra\Csrf\CsrfGuard. Wired, the template can emit $this->csrf() (a hidden _token field) and $this->csrfToken() (the raw token, for a <meta> tag or htmx hx-headers). Left null — the isolation default — the csrf helpers throw if a template calls them, but the rest of the engine works untouched.

Absolute URLs (optional)

PhpView's third argument is an optional base URL string (the app passes its configured site URL). With it, siteUrl('/blog') → https://example.com/blog and siteUrl() → the bare origin. It's a plain string, not an app config object, so this package stays free of any application's config types. Absent it, siteUrl() returns the path unchanged.

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