### Environment Variable Setup

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/vendor/sendgrid/php-http-client/README.md

Instructions for setting up environment variables by copying the example .env file and adding your API key.

```bash
cp .env_example .env
```

--------------------------------

### Quick Start GET Request

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/vendor/sendgrid/php-http-client/README.md

Example of making a GET request to a RESTful API using the SendGrid HTTP Client. Ensure you replace YOUR_SENDGRID_API_KEY and adjust the endpoint and parameters as needed.

```php
// include __DIR__ . '/loader.php';
require 'vendor/autoload.php';
$apiKey = YOUR_SENDGRID_API_KEY;
$authHeaders = [
    'Authorization: Bearer ' . $apiKey
];
$client = new SendGrid\Client('https://api.sendgrid.com', $authHeaders);
$param = 'foo';
$response = $client->your()->api()->_($param)->call()->get();

var_dump(
    $response->statusCode(),
    $response->headers(),
    $response->body()
);
```

--------------------------------

### Quick Start POST Request

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/vendor/sendgrid/php-http-client/README.md

Example of making a POST request with headers, query parameters, and a request body. This demonstrates versioning and custom headers. Replace placeholders and adjust as necessary.

```php
// include __DIR__ . '/loader.php';
require 'vendor/autoload.php';
$apiKey = YOUR_SENDGRID_API_KEY;
$authHeaders = [
    'Authorization: Bearer ' . $apiKey
];
$client = new SendGrid\Client('https://api.sendgrid.com', $authHeaders);
$queryParams = [
    'hello' => 0, 'world' => 1
];
$requestHeaders = [
    'X-Test' => 'test'
];
$data = [
    'some' => 1, 'awesome' => 2, 'data' => 3
];
$param = 'bar';
$response = $client->your()->api()->_($param)->call()->post($data, $queryParams, $requestHeaders);

var_dump(
    $response->statusCode(),
    $response->headers(),
    $response->body()
);
```

--------------------------------

### Mock vs Spy Example

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/mockery/mockery/docs/reference/spies.rst

Illustrates the difference in setup between using a mock with pre-defined expectations and a spy that asserts calls after the action.

```php
// arrange
    $mock = \Mockery::mock('MyDependency');
    $sut = new MyClass($mock);

    // expect
    $mock->shouldReceive('foo')
        ->once()
        ->with('bar');

    // act
    $sut->callFoo();

    // assert
    \Mockery::close();
```

```php
// arrange
    $spy = \Mockery::spy('MyDependency');
    $sut = new MyClass($spy);

    // act
    $sut->callFoo();

    // assert
    $spy->shouldHaveReceived()
        ->foo()
        ->with('bar');
```

--------------------------------

### Install PHP-HTTP Client Common

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/php-http/client-common/README.md

Install the client-common package using Composer.

```bash
composer require php-http/client-common
```

--------------------------------

### Composer Installation

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/vendor/sendgrid/php-http-client/README.md

Add the php-http-client to your project's composer.json file and run composer install.

```json
{
  "require": {
    "sendgrid/php-http-client": "^4.1.1"
  }
}
```

--------------------------------

### Manual Installation Client Instantiation

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/vendor/sendgrid/php-http-client/README.md

Instantiate the SendGrid
Client after including the loader.php file for manual installation.

```php
<?php

include __DIR__ . '/loader.php';

$client = new SendGrid\Client();
```

--------------------------------

### Install Mock Client via Composer

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/php-http/mock-client/README.md

Install the mock client as a development dependency using Composer.

```bash
composer require --dev php-http/mock-client
```

--------------------------------

### Install HTTPlug Discovery

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/php-http/discovery/README.md

Install the HTTPlug Discovery library using Composer.

```bash
composer require php-http/discovery
```

--------------------------------

### Execute Example Script

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/CONTRIBUTING.md

Run a PHP example script to demonstrate the library's functionality. Ensure you have the Composer autoloader included.

```bash
php examples/example.php
```

--------------------------------

### Install getallheaders for PHP < 5.6

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/ralouphie/getallheaders/README.md

Use this command to install the library if your PHP version is less than 5.6. This installs version 2 of the package.

```bash
composer require ralouphie/getallheaders "^2"
```

--------------------------------

### Run Unit Tests for PHP HTTP Client

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/vendor/sendgrid/php-http-client/CONTRIBUTING.md

Install dependencies and run unit tests using PHPUnit. This command filters for tests starting with 'test*' and uses a specific bootstrap file.

```bash
composer install
cd test/unit
../../vendor/bin/phpunit . --bootstrap bootstrap.php --filter test*
```

--------------------------------

### Install Mockery using Composer

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/mockery/mockery/README.md

Install Mockery as a development dependency using Composer.

```sh
composer require --dev mockery/mockery
```

--------------------------------

### Install Project Dependencies for Testing

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/clue/stream-filter/README.md

Shows the Composer command to install all dependencies required to run the project's test suite.

```bash
$ composer install
```

--------------------------------

### Install Dependencies and Update

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/doctrine/instantiator/CONTRIBUTING.md

Navigate to the project directory and install dependencies using Composer. This step is necessary before running tests or making code changes.

```sh
$ cd Instantiator
$ curl -s https://getcomposer.org/installer | php
$ php composer.phar update
```

--------------------------------

### Install Promise via Composer

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/php-http/promise/README.md

Use Composer to install the php-http/promise package.

```bash
$ composer require php-http/promise
```

--------------------------------

### Install DeepCopy with Composer

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/myclabs/deep-copy/README.md

Install the DeepCopy library using Composer. This is the first step to using the library.

```bash
composer require myclabs/deep-copy
```

--------------------------------

### Install php-timer with Composer

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/phpunit/php-timer/README.md

Installs the php-timer library as a project dependency using Composer.

```bash
composer require phpunit/php-timer
```

--------------------------------

### Install getallheaders for PHP >= 5.6

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/ralouphie/getallheaders/README.md

Use this command to install the library if your PHP version is 5.6 or higher.

```bash
composer require ralouphie/getallheaders
```

--------------------------------

### Install php-http/message-factory via Composer

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/php-http/message-factory/README.md

Use Composer to install the php-http/message-factory package.

```bash
$ composer require php-http/message-factory
```

--------------------------------

### Clone Repository and Install Dependencies

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/CONTRIBUTING.md

Clone the sendgrid-php repository and install its dependencies using Composer.

```bash
git clone https://github.com/sendgrid/sendgrid-php.git
cd sendgrid-php
composer install
```

--------------------------------

### Install sebastian/comparator with Composer

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/sebastian/comparator/README.md

Install the comparator library as a local project dependency using Composer.

```bash
composer require sebastian/comparator
```

--------------------------------

### Install sebastian/exporter with Composer

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/sebastian/exporter/README.md

Install the library as a local, per-project dependency using Composer.

```bash
composer require sebastian/exporter
```

--------------------------------

### Install sebastian/object-enumerator with Composer

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/sebastian/object-enumerator/README.md

Install the library as a local, per-project dependency using Composer.

```bash
composer require sebastian/object-enumerator
```

--------------------------------

### Install Mockery via Composer Command Line

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/mockery/mockery/docs/getting_started/installation.rst

A direct command-line method to install Mockery as a development dependency. This is an alternative to manually editing composer.json.

```bash
php composer.phar require --dev mockery/mockery
```

--------------------------------

### Install PHP HTTP Message via Composer

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/php-http/message/README.md

Install the package using Composer by running the command in your terminal.

```bash
$ composer require php-http/message
```

--------------------------------

### Install Twilio SDK for PHP

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/USE_CASES.md

Install the Twilio SDK for PHP using Composer. This is required before sending SMS messages.

```bash
composer require twilio/sdk
```

--------------------------------

### Install sebastian/comparator as a Development Dependency

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/sebastian/comparator/README.md

Install the comparator library as a development-time dependency for tasks like running test suites.

```bash
composer require --dev sebastian/comparator
```

--------------------------------

### Send Email with PHPMailer

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/PHPMailer/README.md

This example demonstrates how to send an email using PHPMailer with SMTP authentication. It includes server configuration, recipient setup, attachments, and HTML/plain text content. Ensure you have Composer installed and have required the autoloader.

```php
<?php
//Import PHPMailer classes into the global namespace
//These must be at the top of your script, not inside a function
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;
use PHPMailer\PHPMailer\Exception;

//Load Composer's autoloader
require 'vendor/autoload.php';

//Instantiation and passing `true` enables exceptions
$mail = new PHPMailer(true);

try {
    //Server settings
    $mail->SMTPDebug = SMTP::DEBUG_SERVER;                      //Enable verbose debug output
    $mail->isSMTP();                                            //Send using SMTP
    $mail->Host       = 'smtp.example.com';                     //Set the SMTP server to send through
    $mail->SMTPAuth   = true;                                   //Enable SMTP authentication
    $mail->Username   = 'user@example.com';                     //SMTP username
    $mail->Password   = 'secret';                               //SMTP password
    $mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS;         //Enable TLS encryption; `PHPMailer::ENCRYPTION_SMTPS` encouraged
    $mail->Port       = 587;                                    //TCP port to connect to, use 465 for `PHPMailer::ENCRYPTION_SMTPS` above

    //Recipients
    $mail->setFrom('from@example.com', 'Mailer');
    $mail->addAddress('joe@example.net', 'Joe User');     //Add a recipient
    $mail->addAddress('ellen@example.com');               //Name is optional
    $mail->addReplyTo('info@example.com', 'Information');
    $mail->addCC('cc@example.com');
    $mail->addBCC('bcc@example.com');

    //Attachments
    $mail->addAttachment('/var/tmp/file.tar.gz');         //Add attachments
    $mail->addAttachment('/tmp/image.jpg', 'new.jpg');    //Optional name

    //Content
    $mail->isHTML(true);                                  //Set email format to HTML
    $mail->Subject = 'Here is the subject';
    $mail->Body    = 'This is the HTML message body <b>in bold!</b>';
    $mail->AltBody = 'This is the body in plain text for non-HTML mail clients';

    $mail->send();
    echo 'Message has been sent';
} catch (Exception $e) {
    echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
}

```

--------------------------------

### GET Collection Data

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/vendor/sendgrid/php-http-client/USAGE.md

Example of making a GET request to retrieve a collection of resources, including query parameters and mock response headers.

```php
$query_params = ['limit' => 100, 'offset' => 0];
$request_headers = ['X-Mock: 200'];
$response = $client->api_keys()->get(null, $query_params, $request_headers);
echo $response->statusCode();
echo $response->body();
echo $response->headers();
```

--------------------------------

### Install sebastian/recursion-context as a development dependency

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/sebastian/recursion-context/README.md

Use this command to add the library as a development-time dependency, for example, for running tests.

```bash
composer require --dev sebastian/recursion-context
```

--------------------------------

### Install sebastian/object-reflector as a Development Dependency

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/sebastian/object-reflector/README.md

Use this command to add the library as a development-time dependency, for example, for running test suites.

```bash
composer require --dev sebastian/object-reflector
```

--------------------------------

### Install sebastian/complexity as a Development Dependency

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/sebastian/complexity/README.md

Use this command to add the library as a development-time dependency, for example, for running test suites.

```bash
composer require --dev sebastian/complexity
```

--------------------------------

### Get PHPUnit Version from PHAR

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/phpunit/phpunit/README.md

Check the installed PHPUnit version using the PHAR archive. Replace X.Y with the downloaded version.

```bash
$ php phpunit-X.Y.phar --version
```

--------------------------------

### Manual Installation Loader

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/vendor/sendgrid/php-http-client/README.md

Create a loader.php file to include the necessary client and response classes when not using Composer.

```php
<?php

require_once __DIR__ . '/lib/php-http-client/lib/Client.php';
require_once __DIR__ . '/lib/php-http-client/lib/Response.php';
```

--------------------------------

### Clone and Set Up Local Repository

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/vendor/sendgrid/php-http-client/FIRST_TIMERS.md

Clone your fork of the php-http-client repository and set up the upstream remote to track the original repository.

```bash
# Clone your fork of the repo into the current directory
git clone https://github.com/your_username/php-http-client
# Navigate to the newly cloned directory
cd php-http-client
# Assign the original repo to a remote called "upstream"
git remote add upstream https://github.com/sendgrid/php-http-client
```

--------------------------------

### Install sebastian/code-unit-reverse-lookup as a development dependency

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/sebastian/code-unit-reverse-lookup/README.md

Use this command to add the library as a development-time dependency, for example, to run your project's test suite.

```bash
composer require --dev sebastian/code-unit-reverse-lookup
```

--------------------------------

### Copy Environment Sample

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/vendor/sendgrid/php-http-client/use_cases/docker.md

Copies the sample environment file to be used for configuration.

```bash
cp examples/.env_sample .env
```

--------------------------------

### Get Bounces using SendGrid v3 Web API (Fluent Interface)

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/README.md

This example shows how to retrieve bounce data using the SendGrid v3 Web API with the fluent interface. It requires the SENDGRID_API_KEY environment variable to be set.

```php
$apiKey = getenv('SENDGRID_API_KEY');
$sg = new \SendGrid($apiKey);

try {
    $response = $sg->client->suppression()->bounces()->get();
    print $response->statusCode() . "\n";
    print_r($response->headers());
    print $response->body() . "\n";
} catch (Exception $e) {
    echo 'Caught exception: '.  $e->getMessage(). "\n";
}
```

--------------------------------

### Get Bounces using SendGrid v3 Web API (Without Fluent Interface)

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/README.md

This example demonstrates retrieving bounce data using the SendGrid v3 Web API without the fluent interface. The SENDGRID_API_KEY environment variable must be configured.

```php
$apiKey = getenv('SENDGRID_API_KEY');
$sg = new \SendGrid($apiKey);

try {
    $response = $sg->client->_("suppression/bounces")->get();
    print $response->statusCode() . "\n";
    print_r($response->headers());
    print $response->body() . "\n";
} catch (Exception $e) {
    echo 'Caught exception: '.  $e->getMessage(). "\n";
}
```

--------------------------------

### Example Fetcher Class with Instance Method

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/mockery/mockery/docs/cookbook/class_constants.rst

A sample class with an instance method and class constants, for demonstrating non-static mocking.

```php
class Fetcher
{
    const SUCCESS = 0;
    const FAILURE = 1;

    public function fetch()
    {
        // Fetcher gets something for us from somewhere...
        return self::SUCCESS;
    }
}

class MyClass
{
    public function doFetching($fetcher)
    {
        $response = $fetcher->fetch();

        if ($response == Fetcher::SUCCESS) {
            echo "Thanks!" . PHP_EOL;
        } else {
            echo "Try again!" . PHP_EOL;
        }
    }
}
```

--------------------------------

### Example Fetcher Class

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/mockery/mockery/docs/cookbook/class_constants.rst

A sample class with static method and class constants.

```php
class Fetcher
{
    const SUCCESS = 0;
    const FAILURE = 1;

    public static function fetch()
    {
        // Fetcher gets something for us from somewhere...
        return self::SUCCESS;
    }
}

class MyClass
{
    public function doFetching()
    {
        $response = Fetcher::fetch();

        if ($response == Fetcher::SUCCESS) {
            echo "Thanks!" . PHP_EOL;
        } else {
            echo "Try again!" . PHP_EOL;
        }
    }
}
```

--------------------------------

### Install Nyholm/psr7

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/nyholm/psr7/README.md

Use Composer to install the Nyholm/psr7 package.

```bash
composer require nyholm/psr7
```

--------------------------------

### Install GuzzleHttp PSR-7

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/guzzlehttp/psr7/README.md

Use Composer to install the guzzlehttp/psr7 package.

```shell
composer require guzzlehttp/psr7
```

--------------------------------

### Initialize SendGrid Client

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/vendor/sendgrid/php-http-client/USAGE.md

Demonstrates how to initialize the SendGrid client with an API key and base URL. Ensure you have the necessary autoloader or client file included.

```php
// If running this outside of this context, use the following include and
// comment out the two includes below
// require __DIR__ . '/vendor/autoload.php';
include(dirname(__DIR__) . '/lib/Client.php');
// This gets the parent directory, for your current directory use getcwd()
$path_to_config = dirname(__DIR__);
$apiKey = getenv('SENDGRID_API_KEY');
$headers = ['Authorization: Bearer ' . $apiKey];
$client = new SendGrid
Client('https://api.sendgrid.com', $headers, '/v3');
```

--------------------------------

### SendGrid Email Configuration Example

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/USE_CASES.md

This comprehensive example demonstrates how to configure various aspects of an email, including global headers, sections, categories, reply-to addresses, ASM settings, IP pool names, mail settings (BCC, bounce, spam, unsubscribe, footer, sandbox, spam check), and tracking settings (click, open, subscription, Google Analytics). It concludes with sending the email using the SendGrid API and handling the response or exceptions.

```php
$email->addGlobalHeader(new Header("X-Day", "Monday"));
$globalHeaders = [
    new Header("X-Month", "January"),
    new Header("X-Year", "2017")
];
$email->addGlobalHeaders($globalHeaders);

$email->addSection(
    new Section(
        "%section1%",
        "Substitution for Section 1 Tag"
    )
);

$sections = [
    new Section(
        "%section3%",
        "Substitution for Section 3 Tag"
    ),
    new Section(
        "%section4%",
        "Substitution for Section 4 Tag"
    )
];
$email->addSections($sections);

$email->addCategory(new Category("Category 1"));
$categories = [
    new Category("Category 2"),
    new Category("Category 3")
];
$email->addCategories($categories);

$email->setBatchId(
    new BatchId(
        "MWQxZmIyODYtNjE1Ni0xMWU1LWI3ZTUtMDgwMDI3OGJkMmY2LWEzMmViMjYxMw"
    )
);

$email->setReplyTo(
    new ReplyTo(
        "dx+replyto2@example.com",
        "DX Team Reply To 2"
    )
);

$asm = new Asm(
    new GroupId(1),
    new GroupsToDisplay([1,2,3,4])
);
$email->setAsm($asm);

$email->setIpPoolName(new IpPoolName("23"));

$mail_settings = new MailSettings();
$mail_settings->setBccSettings(
    new BccSettings(true, "bcc@example.com")
);

// Note: Bypass Spam, Bounce, and Unsubscribe management cannot
// be combined with Bypass List Management
$mail_settings->setBypassBounceManagement(
    new BypassBounceManagement(true)
);
$mail_settings->setBypassSpamManagement(
    new BypassSpamManagement(true)
);
$mail_settings->setBypassUnsubscribeManagement(
    new BypassUnsubscribeManagement(true)
);

// OR
$mail_settings->setBypassListManagement(
    new BypassListManagement(true)
);

$mail_settings->setFooter(
    new Footer(true, "Footer", "<strong>Footer</strong>")
);
$mail_settings->setSandBoxMode(new SandBoxMode(true));
$mail_settings->setSpamCheck(
    new SpamCheck(true, 1, "http://mydomain.com")
);
$email->setMailSettings($mail_settings);

$tracking_settings = new TrackingSettings();
$tracking_settings->setClickTracking(
    new ClickTracking(true, true)
);
$tracking_settings->setOpenTracking(
    new OpenTracking(true, "--sub--")
);
$tracking_settings->setSubscriptionTracking(
    new SubscriptionTracking(
        true,
        "subscribe",
        "<bold>subscribe</bold>",
        "%%sub%%"
    )
);
$tracking_settings->setGanalytics(
    new Ganalytics(
        true,
        "utm_source",
        "utm_medium",
        "utm_term",
        "utm_content",
        "utm_campaign"
    )
);
$email->setTrackingSettings($tracking_settings);

$sendgrid = new \SendGrid(getenv('SENDGRID_API_KEY'));
try {
    $response = $sendgrid->send($email);
    print $response->statusCode() . "\n";
    print_r($response->headers());
    print $response->body() . "\n";
} catch (Exception $e) {
    echo 'Caught exception: '.  $e->getMessage(). "\n";
}

```

--------------------------------

### Parse PHP Code to AST and Dump

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/nikic/php-parser/README.md

Installs the library using composer and demonstrates parsing PHP code into an AST, then dumping the AST in a human-readable format.

```php
<?php
use PhpParser\Error;
use PhpParser\NodeDumper;
use PhpParser\ParserFactory;

$code = <<<'CODE'
<?php

function test($foo)
{
    var_dump($foo);
}
CODE;

$parser = (new ParserFactory)->create(ParserFactory::PREFER_PHP7);
try {
    $ast = $parser->parse($code);
} catch (Error $error) {
    echo "Parse error: {$error->getMessage()}\n";
    return;
}

$dumper = new NodeDumper;
echo $dumper->dump($ast) . "\n";

```

--------------------------------

### Install PHP Text Template as a Project Dependency

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/phpunit/php-text-template/README.md

Use this command to add the library as a local, per-project dependency using Composer.

```bash
composer require phpunit/php-text-template
```

--------------------------------

### Install PHP Invoker as a Project Dependency

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/phpunit/php-invoker/README.md

Use this command to add the library as a local, per-project dependency.

```bash
composer require phpunit/php-invoker
```

--------------------------------

### Install PSR Log Package

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/psr/log/README.md

Use Composer to install the PSR Log package.

```bash
composer require psr/log
```

--------------------------------

### Clone and Install PHP HTTP Client

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/vendor/sendgrid/php-http-client/CONTRIBUTING.md

Clone the SendGrid PHP HTTP Client repository and navigate into the project directory to begin local development.

```bash
git clone https://github.com/sendgrid/php-http-client.git
cd php-http-client
```

--------------------------------

### Copy Environment Sample File

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/sendgrid/README.md

Copy the sample environment file to `.env` to configure your SendGrid API key. This is a common practice for managing sensitive credentials.

```bash
cp .env.sample .env
```

--------------------------------

### Composer Installation (CLI)

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/PHPMailer/README.md

Run this command in your terminal to install PHPMailer using Composer.

```sh
composer require phpmailer/phpmailer
```

--------------------------------

### Install php-code-coverage with Composer

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/phpunit/php-code-coverage/README.md

Add the php-code-code-coverage library as a project dependency using Composer.

```bash
composer require phpunit/php-code-coverage
```

--------------------------------

### Initial Mocking Attempt (Fails)

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/elasticsearch/vendor/mockery/mockery/docs/cookbook/mocking_class_within_class.rst

Demonstrates an initial attempt to mock App\Point and App\Rectangle. This approach fails because App\Point is already autoloaded by the time the mock is set up.

```php
<?php
class MyTest extends PHPUnit\Framework\TestCase {
    public function testCreate() {
        $point = Mockery::mock("App\Point");
        // check if our mock is called
        $point->shouldReceive("setPoint")->andThrow(Exception::class);

        $rect = Mockery::mock("App\Rectangle")->makePartial();
        $rect->shouldReceive("draw");

        $rect->create(0, 0, 100, 100);  // does not throw exception
        Mockery::close();
    }
}

```

--------------------------------

### Composer Installation (JSON)

Source: https://github.com/cubecart/v6/blob/v6.x-master/classes/PHPMailer/README.md

Add this line to your composer.json file to install PHPMailer using Composer.

```json
"phpmailer/phpmailer": "^6.2"
```