# What Are the Dependencies for the SunLicense PHP Class? Complete Guide

> Discover the dependencies for the SunLicense PHP class. This guide reveals it requires zero external dependencies and runs on core PHP 5.6+ functions.

- Repository: [Mehmet Selcuk Batal/php-license-key-generator](https://github.com/msbatal/php-license-key-generator)
- Tags: how-to-guide
- Published: 2026-03-07

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**The SunLicense class requires zero external dependencies and runs entirely on core PHP functions available in PHP 5.6 and above.**

Understanding the dependencies for the SunLicense PHP class is essential before integrating the license key generator into your application. The `msbatal/php-license-key-generator` repository provides a self-contained solution that operates without third-party libraries, Composer packages, or additional PHP extensions.

## SunLicense PHP Class Dependencies Overview

The SunLicense class is architected as a standalone component. Unlike many modern PHP libraries that rely on extensive package ecosystems, this class leverages only native PHP language features and standard library functions.

### Core PHP Functions Used

The implementation relies on fundamental PHP functions that are guaranteed to exist in any standard PHP installation:

- **`rand()`** and **`chr()`** – Generate random characters for key construction
- **`preg_match()`** – Parse license key templates and validate patterns
- **`in_array()`** and **`count()`** – Handle internal bookkeeping and array operations
- **`Exception`** – Native error handling for invalid configurations

These dependencies are inherent to PHP itself, requiring no special installation steps or extension activation.

## Why SunLicense Has No External Dependencies

The absence of external dependencies stems from deliberate architectural choices in the codebase. Examining [`SunLicense.php`](https://github.com/msbatal/php-license-key-generator/blob/main/SunLicense.php) reveals a design philosophy prioritizing portability and minimal overhead.

### Self-Contained Architecture

The source code contains no `require`, `include`, or Composer autoload statements. All logic resides within the single `SunLicense` class definition, making it possible to deploy the generator by copying just one file into your project. This approach eliminates version conflicts, dependency hell, and autoloader overhead.

### PHP Version Requirements

The class functions correctly on **PHP 5.6 and above**. This version threshold ensures compatibility with the randomization functions and exception handling used internally while maintaining support for legacy hosting environments. No PHP extensions beyond the standard distribution are required.

## Practical Code Examples

The following examples demonstrate how to use the SunLicense class without installing any dependencies.

### Generate a Single License Key

Create a basic license key using default settings:

```php
<?php
require 'SunLicense.php';

$license = new SunLicense();   // uses default template and case
echo $license->generate();    // e.g. "X9XX99-XX99-9X9X-99XX9X"
?>

```

### Generate Multiple Keys with Custom Settings

Produce an array of keys with a specific prefix and lowercase formatting:

```php
<?php
require 'SunLicense.php';

$license = new SunLicense('MYAPP', null, 'lower', 5);
$keys = $license->generate(); // returns an array of 5 keys
print_r($keys);
?>

```

### Create Keys Using Custom Templates

Define your own pattern for license key structure:

```php
<?php
require 'SunLicense.php';

$template = 'AA99-99AA';
$license = new SunLicense(null, $template);
echo $license->generate(); // e.g. "KD42-73KF"
?>

```

## Summary

- The **SunLicense PHP class** operates with **zero external dependencies**, requiring only core PHP functions.
- The implementation resides entirely in [`SunLicense.php`](https://github.com/msbatal/php-license-key-generator/blob/main/SunLicense.php) with no `require`, `include`, or Composer statements.
- Compatible with **PHP 5.6 and above** using standard library functions like `rand()`, `preg_match()`, and `chr()`.
- Deployment requires only copying the single class file into your project directory.

## Frequently Asked Questions

### Does SunLicense require Composer to install?

No. The SunLicense class does not use Composer or Packagist. You can install it by simply downloading [`SunLicense.php`](https://github.com/msbatal/php-license-key-generator/blob/main/SunLicense.php) from the `msbatal/php-license-key-generator` repository and including it directly in your project with a standard `require` statement.

### What PHP version is required for SunLicense?

SunLicense requires **PHP 5.6 or higher**. This version ensures support for the exception handling and randomization functions used internally. The class does not rely on any PHP extensions that are not included in the standard PHP distribution.

### Can SunLicense work with PHP frameworks like Laravel or Symfony?

Yes. Because SunLicense has no external dependencies and uses only core PHP functions, it integrates seamlessly with any PHP framework or application architecture. Simply include the class file and instantiate `SunLicense` within your controllers, services, or command classes.

### Are there any performance concerns with using core PHP functions?

No. The SunLicense class uses lightweight, built-in functions such as `rand()` and `preg_match()` that execute efficiently within the PHP runtime. Since there is no autoloading overhead or external library initialization, the class typically generates license keys with minimal memory and CPU usage.