PHP code example of ampproject / amp-toolbox

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

ampproject / amp-toolbox example snippets

use AmpProject\Optimizer\ErrorCollection;
use AmpProject\Optimizer\TransformationEngine;

$transformationEngine = new TransformationEngine();    // 1.
$errorCollection      = new ErrorCollection;           // 2.

$optimizedHtml = $transformationEngine->optimizeHtml(  // 3.
    $unoptimizedHtml,                                  // 4.
    $errorCollection                                   // 5.
);

use AmpProject\Dom\Document;
use AmpProject\Optimizer\ErrorCollection;
use AmpProject\Optimizer\TransformationEngine;

if (! $dom instanceof Document) {
    $dom = Document::fromNode($dom);
}

$transformationEngine = new TransformationEngine();
$errorCollection      = new ErrorCollection;
$transformationEngine->optimizeDom($dom, $errorCollection);

$errorCollection = new ErrorCollection;

// Do the transformation here, while passing in the $errorCollection object.

foreach ($errorCollection as $error) {
	printf(
	    "Error code: %s\nError Message: %s\n",
	    $error->getCode(),
	    $error->getMessage()
	);
}

if ($errorCollection->count() > 0) {
	$this->log('The AMP serverside optimization process produced one or more errors.');
}

if ($errorCollection->has('CannotRemoveBoilerplate')) {
	$this->log('The boilerplate was not removed by the Optimizer.');
}

use AmpProject\Optimizer\Configuration;
use AmpProject\Optimizer\DefaultConfiguration;
use AmpProject\Optimizer\TransformationEngine;
use AmpProject\Optimizer\Transformer;

$configurationData = [
	Configuration::KEY_TRANSFORMERS => [
		Transformer\ServerSideRendering::class,
		Transformer\AmpRuntimeCss::class,
		Transformer\TransformedIdentifier::class,
	],
];

$transformationEngine = new TransformationEngine(
	new DefaultConfiguration($configurationData)
);

use AmpProject\Optimizer\Configuration;
use AmpProject\Optimizer\DefaultConfiguration;
use AmpProject\Optimizer\TransformationEngine;
use AmpProject\Optimizer\Transformer;

$configurationData = [
	Transformer\AmpRuntimeCss::class => [
		Configuration\AmpRuntimeCssConfiguration::CANARY => true,
	],
];

$transformationEngine = new TransformationEngine(
	new DefaultConfiguration($configurationData)
);

public function transform(Document $document, ErrorCollection $errors)
{
	// Apply transformations to the provided $document and ...

	// ... add any encountered errors to the $errors collection.
}

use AmpProject\Optimizer\Configuration;
use AmpProject\Optimizer\DefaultConfiguration;
use AmpProject\Optimizer\TransformationEngine;
use MyProject\MyCustomTransformer;

$configurationData = [
	Configuration::KEY_TRANSFORMERS => array_merge(
		Configuration::DEFAULT_TRANSFORMERS,
		[
			MyCustomTransformer::class
		],
	),
];

$transformationEngine = new TransformationEngine(
	new DefaultConfiguration($configurationData)
);

use AmpProject\Optimizer\Configuration;
use AmpProject\Optimizer\DefaultConfiguration;
use AmpProject\Optimizer\TransformationEngine;
use MyProject\MyCustomTransformer;
use MyProject\MyCustomTransformerConfiguration;

$configurationData = [
	Configuration::KEY_TRANSFORMERS => array_merge(
		Configuration::DEFAULT_TRANSFORMERS,
		[
			MyCustomTransformer::class
		],
	),
	MyCustomTransformer::class => [
		MyCustomTransformerConfiguration::SOME_CONFIG_KEY => 'some value',
	],
];

$configuration = new DefaultConfiguration($configurationData);

$configuration->registerConfigurationClass(
	MyCustomTransformer::class,
	MyCustomTransformerConfiguration::class
);

$transformationEngine = new TransformationEngine($configuration);

namespace MyProject;

use AmpProject\Optimizer\Configuration\BaseTransformerConfiguration;

final class MyCustomTransformerConfiguration extends BaseTransformerConfiguration
{
	const SOME_CONFIG_KEY = 'some_config_key';

	protected function getAllowedKeys()
	{
		return [
			self::SOME_CONFIG_KEY => 'default value',
		];
	}

	protected function validate($key, $value)
	{
		switch ($key) {
			case self::SOME_CONFIG_KEY:
				// Validate configuration value here.
		}

		return $value;
	}
}

namespace MyProject;

use AmpProject\Dom\Document;
use AmpProject\Optimizer\Configurable;
use AmpProject\Optimizer\ErrorCollection;
use AmpProject\Optimizer\TransformerConfiguration;
use AmpProject\Optimizer\Transformer;

final class MyCustomTransformer implements Transformer
{
	private $configuration;

	public function __construct(TransformerConfiguration $configuration)
	{
		$this->configuration = $configuration;
	}

	public function transform(Document $document, ErrorCollection $errors)
	{
		// Bogus transformer logic that adds the configuration value as a body attribute.
		$document->body->setAttribute(
			'data-my-custom-transformer-body-attribute,
			$this->configuration->get(
				MyCustomTransformerConfiguration::SOME_CONFIG_KEY
			)
		);
	}
}

namespace MyProject;

use AmpProject\Dom\Document;
use AmpProject\RemoteGetRequest;
use AmpProject\Optimizer\ErrorCollection;
use AmpProject\Optimizer\Transformer;
use Throwable;

final class MyCustomTransformer implements Transformer
{
	const END_POINT = 'https://example.com/some_endpoint/';

	private $remoteRequest;

	public function __construct(RemoteGetRequest $remoteRequest)
	{
		$this->remoteRequest = $remoteRequest;
	}

	public function transform(Document $document, ErrorCollection $errors)
	{
		try {
			$response = $this->remoteRequest->get(self::END_POINT);
		} catch (Throwable $exception) {
			// Add error handling here.
		}

		$statusCode = $response->getStatusCode();

		if (200 < $statusCode || $statusCode >= 300) {
			// Add error handling here.
		}

		$content = $response->getBody();

		// Make use of the $content you've just retrieved from an external source.
	}
}

use AmpProject\Optimizer\DefaultConfiguration;
use AmpProject\Optimizer\TransformationEngine;

$transformationEngine = new TransformationEngine(
	new DefaultConfiguration(),

	// A custom implementation that lets you control how remote requests are handled.
	new MyCustomRemoteGetRequestImplementation()
);

use AmpProject\Optimizer\DefaultConfiguration;
use AmpProject\Optimizer\TransformationEngine;
use AmpProject\RemoteRequest\CurlRemoteGetRequest;
use AmpProject\RemoteRequest\FallbackRemoteGetRequest;
use AmpProject\RemoteRequest\FilesystemRemoteGetRequest;

const FALLBACK_MAPPING = [
	'https://example.com/some_endpoint/' => __DIR__ . '/../fallback_files/some_endpoint.json',
];

$remoteRequest = new FallbackRemoteGetRequest(
	new CurlRemoteGetRequest(true, 5, 0),                  // 5 second timeout with no retries, and ...
	new FilesystemRemoteGetRequest(self::FALLBACK_MAPPING) // ... fall back to shipped files.
);

$transformationEngine = new TransformationEngine(new DefaultConfiguration(), $remoteRequest);