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# Serializable Closure
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## Introduction
> This project is a fork of the excellent [opis/closure: 3.x](https://github.com/opis/closure) package. At Laravel, we decided to fork this package as the upcoming version [4.x](https://github.com/opis/closure) is a complete rewrite on top of the [FFI extension](https://www.php.net/manual/en/book.ffi.php). As Laravel is a web framework, and FFI is not enabled by default in web requests, this fork allows us to keep using the `3.x` series while adding support for new PHP versions.
Laravel Serializable Closure provides an easy and secure way to **serialize closures in PHP**.
## Official Documentation
### Installation
> **Requires [PHP 7.4+](https://php.net/releases/)**
First, install Laravel Serializable Closure via the [Composer](https://getcomposer.org/) package manager:
```bash
composer require laravel/serializable-closure
```
### Usage
You may serialize a closure this way:
```php
use Laravel\SerializableClosure\SerializableClosure;
$closure = fn () => 'james';
// Recommended
SerializableClosure::setSecretKey('secret');
$serialized = serialize(new SerializableClosure($closure));
$closure = unserialize($serialized)->getClosure();
echo $closure(); // james;
```
### Caveats
* Anonymous classes cannot be created within closures.
* Attributes cannot be used within closures.
* Serializing closures on REPL environments like Laravel Tinker is not supported.
* Serializing closures that reference objects with readonly properties is not supported.
## Contributing
Thank you for considering contributing to Serializable Closure! The contribution guide can be found in the [Laravel documentation](https://laravel.com/docs/contributions).
## Code of Conduct
In order to ensure that the Laravel community is welcoming to all, please review and abide by the [Code of Conduct](https://laravel.com/docs/contributions#code-of-conduct).
## Security Vulnerabilities
Please review [our security policy](https://github.com/laravel/serializable-closure/security/policy) on how to report security vulnerabilities.
## License
Serializable Closure is open-sourced software licensed under the [MIT license](LICENSE.md).