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A Simple PHP Renderer for Slim 3 (or any other PSR-7 project)
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README.md

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PHP Renderer

This is a renderer for rendering PHP view scripts into a PSR-7 Response object. It works well with Slim Framework 3.

Cross-site scripting (XSS) risks

Note that PHP-View has no built-in mitigation from XSS attacks. It is the developer's responsibility to use htmlspecialchars() or a component like zend-escaper. Alternatively, consider Twig-View.

Installation

Install with Composer:

composer require slim/php-view

Usage with Slim 3

use Slim\Views\PhpRenderer;

include "vendor/autoload.php";

$app = new Slim\App();
$container = $app->getContainer();
$container['renderer'] = new PhpRenderer("./templates");

$app->get('/hello/{name}', function ($request, $response, $args) {
    return $this->renderer->render($response, "hello.php", $args);
});

$app->run();

Usage with any PSR-7 Project

//Construct the View
$phpView = new PhpRenderer("./path/to/templates");

//Render a Template
$response = $phpView->render(new Response(), "hello.php", $yourData);

Template Variables

You can now add variables to your renderer that will be available to all templates you render.

// via the constructor
$templateVariables = [
    "title" => "Title"
];
$phpView = new PhpRenderer("./path/to/templates", $templateVariables);

// or setter
$phpView->setAttributes($templateVariables);

// or individually
$phpView->addAttribute($key, $value);

Data passed in via ->render() takes precedence over attributes.

$templateVariables = [
    "title" => "Title"
];
$phpView = new PhpRenderer("./path/to/templates", $templateVariables);

//...

$phpView->render($response, $template, [
    "title" => "My Title"
]);
// In the view above, the $title will be "My Title" and not "Title"

Sub-templates

Inside your templates you may use $this to refer to the PhpRenderer object to render sub-templates.

Rendering in Layouts

You can now render view in another views called layouts, this allows you to compose modular view templates and help keep your views DRY.

Create your layout ./path/to/templates/layout.php.

<html><head><title><?=$title?></title></head><body><?=$content?></body></html>

Create your view template ./path/to/templates/hello.php.

Hello <?=$name?>!

Rendering in your code.

$phpView = new PhpRenderer("./path/to/templates", ["title" => "My App"]);
$phpView->setLayout("layout.php");

//...

$phpview->render($response, "hello.php", ["title" => "Hello - My App", "name" => "John"]);

Response will be

<html><head><title>Hello - My App</title></head><body>Hello John!</body></html>

Please note, the $content is special variable used inside layouts to render the wrapped view and should not be set in your view paramaters.

Exceptions

\RuntimeException - if template does not exist

\InvalidArgumentException - if $data contains 'template'

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