First commit.

.github/workflows/build.yml

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+name: Build
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php: [8.2, 8.1]
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Validate composer.json and composer.lock
+        run: composer validate --strict --no-check-version
+
+      - name: Cache Composer packages
+        id: composer-cache
+        uses: actions/cache@v2
+        with:
+          path: vendor
+          key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-php-
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-progress
+
+      - name: Run unit test suite
+        run: composer test
+
+      - name: Validate coding standards
+        run: composer lint
+
+      - name: Run static analysis
+        run: composer static-analysis

.gitignore

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+.phpunit.cache/
+vendor/
+.idea/
+.php-cs-fixer.cache

.php-cs-fixer.php

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+<?php
+
+$finder = PhpCsFixer\Finder::create()
+    ->in(__DIR__)
+    ->exclude('vendor')
+;
+
+$config = new PhpCsFixer\Config();
+
+return $config->setRules([
+        '@Symfony' => true,
+    ])
+    ->setFinder($finder)
+;

LICENSE

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+Copyright (c) 2023 Carla Gouveia
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Makefile

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+.PHONY: test
+test:
+	vendor/bin/phpunit
+	vendor/bin/phpstan
+	vendor/bin/php-cs-fixer check

README.md

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+# bitset-php
+![Build Status](https://github.com/carlagouveia/bitset-php/actions/workflows/build.yml/badge.svg)
+[![GitHub release](https://img.shields.io/github/release/carlagouveia/bitset-php.svg)](https://github.com/carlagouveia/bitset-php/releases/latest)
+[![License](https://img.shields.io/github/license/carlagouveia/bitset-php)](https://github.com/carlagouveia/bitset-php/blob/master/LICENSE)
+
+bitset-php is a reimplementation of `std::bitset` that allows PHP to interface with C++. It aims to provide a stable
+interface instead of a full bitwise replacement.
+
+## Install
+    $ composer require carlagouveia/bitset-php
+
+## Development
+    $ composer install
+    $ make test

composer.json

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+{
+    "name": "carlagouveia/bitset-php",
+    "description": "bitset-php is a reimplementation of `std::bitset` that allows PHP to interface with C++.",
+    "keywords": ["bitset", "cpp"],
+    "homepage": "https://github.com/carlagouveia/bitset-php",
+    "type": "library",
+    "license": "MIT",
+    "autoload": {
+        "psr-4": {
+            "Cpp\\Std\\": "src/"
+        }
+    },
+    "authors": [
+        {
+            "name": "Carla Gouveia",
+            "email": "[email protected]"
+        }
+    ],
+    "require-dev": {
+        "phpunit/phpunit": "^10.3",
+        "friendsofphp/php-cs-fixer": "^3.34",
+        "phpstan/phpstan": "^1.10"
+    },
+    "scripts": {
+        "test": "vendor/bin/phpunit",
+        "static-analysis": "vendor/bin/phpstan",
+        "lint": "vendor/bin/php-cs-fixer check"
+    }
+}