ramsey/composer-repl

A REPL for PHP built into Composer.

About

This Composer plugin provides the composer repl command.

REPL stands for read-eval-print loop. It's a language shell that reads user input, evaluates the input using a programming language (in this case, PHP), and prints the output to the screen. Then, it returns to the read state (that's the loop part).

PsySH is the REPL providing the magic behind ramsey/composer-repl. PsySH is a language shell for PHP. It's similar to irb for Ruby, IPython for Python, and JShell for Java. In addition to acting as a language shell, PsySH can also function as an interactive debugger and development console. Laravel Tinker, Drush for Drupal, WP-CLI shell for WordPress, CakePHP console, and Yii shell are a few of the projects using PsySH.

💡 You may use this REPL without the Composer plugin functionality by requiring ramsey/composer-repl-lib instead.

This project adheres to a code of conduct. By participating in this project and its community, you are expected to uphold this code.

Installation

Install this package as a development dependency using Composer.

composer require --dev ramsey/composer-repl

Usage

Open your terminal and type composer repl. You may also type composer shell, if you prefer.

You'll see something similar to this:

Psy Shell v0.11.1 (PHP 8.1.1 — cli) by Justin Hileman
------------------------------------------------------------------------
Welcome to the development console (REPL).
To learn more about what you can do in PsySH, type `help`.
------------------------------------------------------------------------
>>>

While in the dev console, you can do cool things like this:

>>> $hello = 'Hello, world'
=> "Hello, world"

>>> echo $hello
Hello, world

>>> foreach ([1, 2, 3] as $x) echo $x . "\n"
1
2
3

>>> $date = new DateTimeImmutable();
=> DateTimeImmutable @1598393282 {#6953
     date: 2020-08-25 22:08:02.643076 UTC (+00:00),
   }

>>> $getDate = fn (DateTimeInterface $dt): DateTimeInterface => $dt;
=> Closure(DateTimeInterface $dt): DateTimeInterface {#6964 …3}

>>> t assertInstanceOf(DateTimeInterface::class, $date);
Test passed!

>>> t assertSame($date, $getDate($date))
Test passed!

>>> phpunit

PHPUnit 9.5.11 by Sebastian Bergmann and contributors.

Runtime:       PHP 8.1.1
Configuration: /path/to/ramsey/conventional-commits/phpunit.xml.dist

...............................................................  63 / 221 ( 28%)
............................................................... 126 / 221 ( 57%)
............................................................... 189 / 221 ( 85%)
................................                                221 / 221 (100%)

Time: 00:00.064, Memory: 12.00 MB

OK (221 tests, 484 assertions)

✨🐘 This implementation of PsySH has Super ElePHPant Powers. 🐘✨

Environment Bootstrapping

The power of this REPL comes in its ability to act as a tool in your local development environment. So, you might want to load parts of your environment (i.e., configuration, objects, etc.), so you can access these from within the REPL.

You can do this by specifying any number of PHP scripts to include in composer.json, like this:

{
    "extra": {
        "ramsey/composer-repl": {
            "includes": [
                "repl.php",
                "tests/bootstrap.php"
            ]
        }
    }
}

Any variables set or configuration loaded from these scripts is available to use from within the REPL.

For example, if repl.php contains:

<?php
$foo = 'bar';

And we use composer.json to load it with the REPL:

{
    "extra": {
        "ramsey/composer-repl": {
            "includes": [ "repl.php" ]
        }
    }
}

Then, when we're in the REPL, we'll see $foo defined:

>>> ls
Variables: $env, $foo, $phpunit

>>> $foo
=> "bar"

Contributing

Contributions are welcome! To contribute, please familiarize yourself with CONTRIBUTING.md.

Coordinated Disclosure

Keeping user information safe and secure is a top priority, and we welcome the contribution of external security researchers. If you believe you've found a security issue in software that is maintained in this repository, please read SECURITY.md for instructions on submitting a vulnerability report.

Copyright and License

The ramsey/composer-repl plugin is copyright © Ben Ramsey and licensed for use under the terms of the MIT License (MIT). Please see LICENSE for more information.