diff --git a/Config.php b/Config.php
new file mode 100644
index 0000000..b70316b
--- /dev/null
+++ b/Config.php
@@ -0,0 +1,85 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Jordy
+ * Date: 2019/12/5
+ * Time: 6:03 PM
+ */
+
+namespace All\Config;
+
+use Ali\InstanceTrait;
+use All\Exception\WarnException;
+
+class Config
+{
+    use InstanceTrait;
+
+    private $path;
+    private $data;
+
+    public function setPath($path)
+    {
+        $this->path = $path;
+        return $this;
+    }
+
+    /**
+     * @return mixed
+     * @throws WarnException
+     */
+    public function getPath()
+    {
+        if (!$this->path) {
+            throw new WarnException('Config path is not configured');
+        }
+        return $this->path;
+    }
+
+    /**
+     * @param string $key example: db/default.master.host
+     * @return array|null
+     * @throws \Exception
+     */
+    public function get($key)
+    {
+        list($file, $keys) = $this->parseKey($key);
+        $data = $this->getData($file);
+        if (!$keys || !$data) {
+            return $data;
+        }
+        foreach ($keys as $key) {
+            if (!is_array($data) || !isset($data[$key])) {
+                return null;
+            }
+            $data = $data[$key];
+        }
+        return $data;
+    }
+
+    /**
+     * @param $file
+     * @return array|null
+     * @throws WarnException
+     */
+    private function getData($file)
+    {
+        if (isset($this->data[$file])) {
+            return $this->data[$file];
+        }
+        $filePath = $this->getPath() . DIRECTORY_SEPARATOR . $file . '.php';
+        if (!is_file($filePath) || !is_readable($filePath)) {
+            return null;
+        }
+        $data = include $filePath;
+        $data = $data && is_array($data) ? $data : [];
+        return $this->data[$file] = $data;
+    }
+
+    private function parseKey($key)
+    {
+        $keys = explode('.', $key);
+        $file = trim(array_shift($keys), '/');
+        return [$file, $keys];
+    }
+}
\ No newline at end of file
diff --git a/README.md b/README.md
index a2bc206..e8bb2f1 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,12 @@
 # php-config
 PHP 配置类
+
+## Usage
+
+```php
+<?php
+$config = Config::getInstance();
+$config->setPath('./');
+
+$data = $config->get('path1/filename.level1.level2');
+```
\ No newline at end of file
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..0a2dce1
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,26 @@
+{
+    "name": "boxunphp/php-config",
+    "description": "PHP 配置类",
+    "type": "library",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Jordy",
+            "email": "arno.zheng@gmail.com"
+        }
+    ],
+    "minimum-stability": "dev",
+    "require-dev": {
+        "phpunit/phpunit": "7.*"
+    },
+    "require": {
+        "php": "^7.1",
+        "boxunsoft/php-instance": "^v1.1.0",
+        "boxunphp/php-exception": "^v1.0.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "All\\Config\\": ""
+        }
+    }
+}
diff --git a/composer.lock b/composer.lock
new file mode 100644
index 0000000..40d7844
--- /dev/null
+++ b/composer.lock
@@ -0,0 +1,1556 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "d380bde51eaf58136fb613007b9096a9",
+    "packages": [
+        {
+            "name": "boxunphp/php-exception",
+            "version": "v1.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/boxunphp/php-exception.git",
+                "reference": "95c722a1665285b2a5872adff0b0a0f6210dc452"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/boxunphp/php-exception/zipball/95c722a1665285b2a5872adff0b0a0f6210dc452",
+                "reference": "95c722a1665285b2a5872adff0b0a0f6210dc452",
+                "shasum": ""
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "All\\Exception\\": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jordy",
+                    "email": "arno.zheng@gmail.com"
+                }
+            ],
+            "description": "PHP Exception",
+            "time": "2019-12-05T09:57:21+00:00"
+        },
+        {
+            "name": "boxunsoft/php-instance",
+            "version": "v1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/boxunsoft/php-instance.git",
+                "reference": "6a4c4622da3000e97a792a9f728d3922a8eeb645"
+            },
+            "dist": {
+                "type": "zip",
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+                "reference": "6a4c4622da3000e97a792a9f728d3922a8eeb645",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Ali\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jordy",
+                    "email": "arno.zheng@gmail.com"
+                }
+            ],
+            "description": "php instance trait",
+            "time": "2018-12-29T02:25:36+00:00"
+        }
+    ],
+    "packages-dev": [
+        {
+            "name": "doctrine/instantiator",
+            "version": "1.3.x-dev",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/instantiator.git",
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+            },
+            "require": {
+                "php": "^7.1"
+            },
+            "require-dev": {
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+                "ext-pdo": "*",
+                "ext-phar": "*",
+                "phpbench/phpbench": "^0.13",
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+            "type": "library",
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+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Marco Pivetta",
+                    "email": "ocramius@gmail.com",
+                    "homepage": "http://ocramius.github.com/"
+                }
+            ],
+            "description": "A small, lightweight utility to instantiate objects in PHP without invoking their constructors",
+            "homepage": "https://www.doctrine-project.org/projects/instantiator.html",
+            "keywords": [
+                "constructor",
+                "instantiate"
+            ],
+            "time": "2019-10-21T16:45:58+00:00"
+        },
+        {
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+            "source": {
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+                "url": "https://github.com/myclabs/DeepCopy.git",
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+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1"
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+            "replace": {
+                "myclabs/deep-copy": "self.version"
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+            "require-dev": {
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+                "doctrine/common": "^2.6",
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+            },
+            "type": "library",
+            "autoload": {
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+            "notification-url": "https://packagist.org/downloads/",
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+                "copy",
+                "duplicate",
+                "object",
+                "object graph"
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+            "time": "2019-08-26T15:40:39+00:00"
+        },
+        {
+            "name": "phar-io/manifest",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
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+            "authors": [
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+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                },
+                {
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+                    "email": "sebastian@phpeople.de",
+                    "role": "Developer"
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+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
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+            ],
+            "description": "Component for reading phar.io manifest information from a PHP Archive (PHAR)",
+            "time": "2019-10-11T06:20:36+00:00"
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+                    "email": "sebastian@phpeople.de",
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+            "license": [
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+            "authors": [
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+                    "name": "Jaap van Otterdijk",
+                    "email": "opensource@ijaap.nl"
+                }
+            ],
+            "description": "Common reflection classes used by phpdocumentor to reflect the code structure",
+            "homepage": "http://www.phpdoc.org",
+            "keywords": [
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+            "description": "Highly opinionated mocking framework for PHP 5.3+",
+            "homepage": "https://github.com/phpspec/prophecy",
+            "keywords": [
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+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
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+            "extra": {
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+                    "dev-master": "1.1-dev"
+                }
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+                ]
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+                    "email": "sebastian@phpunit.de"
+                }
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+            "homepage": "https://github.com/sebastianbergmann/object-reflector/",
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+        },
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+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
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+                    "dev-master": "3.0.x-dev"
+                }
+            },
+            "autoload": {
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+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
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+            ],
+            "authors": [
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+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Jeff Welch",
+                    "email": "whatthejeff@gmail.com"
+                },
+                {
+                    "name": "Adam Harvey",
+                    "email": "aharvey@php.net"
+                }
+            ],
+            "description": "Provides functionality to recursively process PHP variables",
+            "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
+            "time": "2019-10-23T09:08:39+00:00"
+        },
+        {
+            "name": "sebastian/resource-operations",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/resource-operations.git",
+                "reference": "89893975fe3fcc2e60214471761af5e91cc7a933"
+            },
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+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Provides a list of PHP built-in functions that operate on resources",
+            "homepage": "https://www.github.com/sebastianbergmann/resource-operations",
+            "time": "2019-10-23T09:09:44+00:00"
+        },
+        {
+            "name": "sebastian/version",
+            "version": "2.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/version.git",
+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019"
+            },
+            "dist": {
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+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that helps with managing the version number of Git-hosted PHP projects",
+            "homepage": "https://github.com/sebastianbergmann/version",
+            "time": "2016-10-03T07:35:21+00:00"
+        },
+        {
+            "name": "symfony/polyfill-ctype",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-ctype.git",
+                "reference": "f8f0b461be3385e56d6de3dbb5a0df24c0c275e3"
+            },
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+                "reference": "f8f0b461be3385e56d6de3dbb5a0df24c0c275e3",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "suggest": {
+                "ext-ctype": "For best performance"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.13-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Ctype\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Gert de Pagter",
+                    "email": "BackEndTea@gmail.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill for ctype functions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "ctype",
+                "polyfill",
+                "portable"
+            ],
+            "time": "2019-11-27T13:56:44+00:00"
+        },
+        {
+            "name": "theseer/tokenizer",
+            "version": "1.1.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "11336f6f84e16a720dae9d8e6ed5019efa85a0f9"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/11336f6f84e16a720dae9d8e6ed5019efa85a0f9",
+                "reference": "11336f6f84e16a720dae9d8e6ed5019efa85a0f9",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": "^7.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "time": "2019-06-13T22:48:21+00:00"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "1.6.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozart/assert.git",
+                "reference": "573381c0a64f155a0d9a23f4b0c797194805b925"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/573381c0a64f155a0d9a23f4b0c797194805b925",
+                "reference": "573381c0a64f155a0d9a23f4b0c797194805b925",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3.3 || ^7.0",
+                "symfony/polyfill-ctype": "^1.8"
+            },
+            "conflict": {
+                "vimeo/psalm": "<3.6.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.8.36 || ^7.5.13"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Assertions to validate method input/output with nice error messages.",
+            "keywords": [
+                "assert",
+                "check",
+                "validate"
+            ],
+            "time": "2019-11-24T13:36:37+00:00"
+        }
+    ],
+    "aliases": [],
+    "minimum-stability": "dev",
+    "stability-flags": [],
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": {
+        "php": "^7.1"
+    },
+    "platform-dev": []
+}
diff --git a/phpunit.sh b/phpunit.sh
new file mode 100644
index 0000000..7c3ba02
--- /dev/null
+++ b/phpunit.sh
@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+vendor/bin/phpunit --configuration tests/phpunit.xml --colors tests
\ No newline at end of file
diff --git a/tests/ConfigTest.php b/tests/ConfigTest.php
new file mode 100644
index 0000000..6e32cbb
--- /dev/null
+++ b/tests/ConfigTest.php
@@ -0,0 +1,28 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Jordy
+ * Date: 2019/12/5
+ * Time: 6:06 PM
+ */
+
+namespace ConfigTest;
+
+use All\Config\Config;
+use PHPUnit\Framework\TestCase;
+
+class ConfigTest extends TestCase
+{
+    private $config;
+
+    protected function setUp()
+    {
+        $this->config = Config::getInstance();
+        $this->config->setPath(__DIR__);
+    }
+
+    public function testGet()
+    {
+        $this->assertEquals($this->config->get('config.master.host'), '127.0.0.1');
+    }
+}
\ No newline at end of file
diff --git a/tests/config.php b/tests/config.php
new file mode 100644
index 0000000..6d74abe
--- /dev/null
+++ b/tests/config.php
@@ -0,0 +1,12 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Jordy
+ * Date: 2019/12/5
+ * Time: 6:08 PM
+ */
+return [
+    'master' => [
+        'host' => '127.0.0.1'
+    ]
+];
\ No newline at end of file
diff --git a/tests/phpunit.xml b/tests/phpunit.xml
new file mode 100644
index 0000000..e5b7504
--- /dev/null
+++ b/tests/phpunit.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<phpunit bootstrap="../vendor/autoload.php">
+    <php>
+        <var name="PATH" value="./" />
+    </php>
+</phpunit>
\ No newline at end of file