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https://github.com/slack-php/slack-php-slick

Dependency-free micro-framework for building Slack apps in PHP
https://github.com/slack-php/slack-php-slick

blockkit framework micro-framework php slack slack-api slack-bot

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Dependency-free micro-framework for building Slack apps in PHP

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# Slick (by slack-php)



A _slick_, single-file, dependency-free PHP micro-framework for building simple Slack apps.



**For something more robust, you should use our fully-featured [Slack PHP Framework][1].**



If you are new to Slack app development, you will want to learn about it on [Slack's website][2].



## Installation



### Requirements



Requires PHP 7.3+ with JSON support.



### Via Composer



We recommend using Composer to install Slick, so that autoloading and keeping it up-to-date are easy.



```

composer require slack-php/slick

```



### Manual



However, since Slick has no dependencies, you can directly download and require `Slick.php` or copy & paste the code

directly into your project.



(If you do end up doing this, let me know, because I will have no other way to track that it's happening.)



## Basic Usage



This small app responds to the `/cool` slash command by posting a message back to the conversation where

the slack command was used.



> Assumptions:

>

> - You have required the Composer autoloader to autoload Slick, OR you have required `Slick.php` directly.

> - You have `SLACK_SIGNING_KEY` set in your environment such that it is present in `$_SERVER`.



```php

route('command', '/cool', function (array $payload) {

        return "Thanks for running the `{$payload['command']}` command. You are cool! :thumbsup:";

    })

    ->run();

```



_Want to run this example in your workspace? Check out the [Example App][3] using Docker._



### Breaking It Down



Let's add some comments to that last example, so you know what is going on.



```php

route(

        // The payload type (e.g., command, block_actions, view_submission, shortcut, and others).

        'command',

        // The payload ID. It's different based on the type. For commands, it is the command name.

        '/cool',

        // The listener that handles the specific interaction's logic.

        function (array $payload) {

            // Any app logic can be done here, including calling Slack's APIs.

            // Whatever you do, it should take less than 3 seconds, so you can "ack" before Slack's timeout.

        

            // Whatever is returned will be included as part of the "ack" (response) body. You can return a string, an

            // associative array, or JSON-serializable object. You should make sure that anything you include in the ack

            // is supported by the type of interaction you are responding to. Many interactions don't require an ack

            // body, so you can also return null, and empty string, or just omit a return statement, entirely.

            return "Thanks for running the `{$payload['command']}` command. You are cool! :thumbsup:";

        }

    )

    // Add as many routes as you need to handle all your interactions.

    ->route(...)

    ->route(...)

    ->route(...)

    // Runs the Slack app. This includes the following steps:

    // 1. Reads data from the current request (e.g., via $_SERVER and php://input).

    // 2. Validates the request from Slack, including verifying the request signature from the header.

    // 3. Parses the request body into an array of Slack payload data.

    // 4. Determines the payload type and ID.

    // 5. Executes one of the registered listeners based on the payload type and ID.

    // 6. Acks (responds) back to Slack.

    ->run();

```



## Customization



There isn't much to customize, but you can control the behavior of your Slick Slack app when:



1. The incoming request doesn't match one of your routes (`on404()`).

2. An error occurs while processing the incoming request (`orErr()`).



```php

route(...)

    ->route(...)

    ->route(...)

    ->on404(function (array $payload) {

        // Do something custom. This is essentially used as a catch-all listener.

        // If you don't use on404(), then your app throws an error.

    })

    ->onErr(function (Throwable $err) {

        // Do something custom.

        // If you don't use onErr(), then your app calls `error_log()` and acks with a 500-level response.

    })

    ->run();

```



## Helper Functions



If you want to do your own request handling, Slick provides some static helper methods that you can use independent from

the routing features.



- `Slick::validateSignature(string $key, string $signature, int $time, string $body): void` – Validates a Slack request

  signature using their v0 algorithm.

- `Slick::parseRequestBody(string $body): array` – Parses a request body into an associative array of Slack payload

  data. Works for any payload type. Must provide the raw request body as a string (e.g., from `php://input`).

- `Slick::getPayloadType(array $payload): string` – Determines the payload type from an array of payload data.

- `Slick::getPayloadId(array $payload): string` – Determines the payloads routable ID from an array of payload data,

  based on its type.

- `Slack::ack(string $ack): void` – Echos an "ack" response with suitable headers and status code.



[1]: https://github.com/slack-php/slack-php-app-framework

[2]: https://api.slack.com/start

[3]: https://github.com/slack-php/slack-php-slick/tree/main/example