### Run Built-in PHP Web Server

Source: https://github.com/redbitcz/simpleshop-api-php-sdk/blob/master/README.md

Start the PHP built-in web server from the examples directory to test the SDK. Use a different port if 8000 is occupied.

```shell
php -S localhost:8000
```

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

### Install Composer Dependencies

Source: https://github.com/redbitcz/simpleshop-api-php-sdk/blob/master/README.md

After cloning the repository, run this command to install necessary packages for the SDK to run.

```shell
composer install
```

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

### Install SDK via Composer

Source: https://github.com/redbitcz/simpleshop-api-php-sdk/blob/master/README.md

Recommended method for installing the SDK library into your project using Composer.

```shell
composer require redbitcz/simpleshop-api-php-sdk
```

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

### Include Autoloader

Source: https://github.com/redbitcz/simpleshop-api-php-sdk/blob/master/README.md

Add this line to the beginning of your main PHP file (e.g., index.php) to load the SDK dependencies after installing via Composer.

```php
require __DIR__ . '/vendor/autoload.php';
```

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

### Clone the SDK Repository

Source: https://github.com/redbitcz/simpleshop-api-php-sdk/blob/master/README.md

Use this command to download the entire SDK repository. Alternatively, download the ZIP archive.

```shell
git clone https://github.com/redbitcz/simpleshop-api-php-sdk.git
```

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

### Instantiate SimpleShopApi Object

Source: https://github.com/redbitcz/simpleshop-api-php-sdk/blob/master/README.md

Create an instance of the SimpleShopApi class using your login and API key. Retrieve these credentials from your SimpleShop API settings.

```php
$simpleshop = new \Redbitcz\SimpleShop\Api\SimpleShopApi('login', 'API klíč');
```

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

### Call an API Method

Source: https://github.com/redbitcz/simpleshop-api-php-sdk/blob/master/README.md

After creating the API object, you can directly call its methods, such as retrieving an invoice by its ID.

```php
$invoice = $simpleshop->getInvoice(12345);
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.