diff --git a/.gitignore b/.gitignore
index ec8dd5b..f9a70cb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,7 @@
 composer.lock
-phpunit.xml
 .phpunit.result.cache
-vendor/
 src/voipbl.conf
 src/localbl.db
 src/voipbl.db
+docs/php/build/
+vendor/
diff --git a/README.md b/README.md
index fb9b5b5..e9edbe7 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,8 @@ when to use API acknowledgements.
 
 ## Library Usage
 
-Instead of using the `voipbl.php` file, you can use the `ExaBGP\VoIPBL` classes independently.
+Instead of using the `voipbl.php` file, you can use the `ExaBGP\VoIPBL` classes independently. Check the
+[ExaBGP\VoIPBL library documentation](docs/php/README.md) for the list of functions and their arguments.
 
 ```php
 use ExaBGP\VoIPBL\Loader;
@@ -57,12 +58,13 @@ $version = $controller->sendCommand('version', true);
 
 ## Development & Testing
 
-To verify the integrity of the codebase you can run the PHP linter and unit tests:
+To verify the integrity of the codebase you can run the PHP linter, unit tests, and update the library documentation:
 
 ```
 $ composer install
-$ ./vendor/bin/phpunit
-$ ./vendor/bin/phpcs --standard=phpcs.xml --extensions=php src/ tests/
+$ composer phpunit
+$ composer phpcs
+$ composer phpdoc
 ```
 
 ## Collaboration
diff --git a/composer.json b/composer.json
index 47660b2..b23c8ea 100644
--- a/composer.json
+++ b/composer.json
@@ -19,12 +19,20 @@
     "php": ">=7.0"
   },
   "require-dev": {
+    "cvuorinen/phpdoc-markdown-public": ">=0.2",
+    "jms/serializer": "^1.7",
     "squizlabs/php_codesniffer": ">=3.0",
+    "phpdocumentor/phpdocumentor": ">=2.9",
     "phpunit/phpunit": ">=8.0"
   },
   "autoload": {
     "psr-4": {
       "ExaBGP\\": "src/ExaBGP/"
     }
+  },
+  "scripts": {
+    "phpcs": "phpcs --standard=phpcs.xml --extensions=php src/ tests/",
+    "phpdoc": "phpdoc && sed -i \"s/'/'/g\" docs/php/README.md",
+    "phpunit": "phpunit"
   }
 }
diff --git a/docs/php/README.md b/docs/php/README.md
new file mode 100644
index 0000000..467ffb8
--- /dev/null
+++ b/docs/php/README.md
@@ -0,0 +1,440 @@
+# ExaBGP\VoIPBL Library Documentation
+
+## Table of Contents
+
+* [Controller](#controller)
+    * [__construct](#__construct)
+    * [init](#init)
+    * [loadVersion](#loadversion)
+    * [sendCommand](#sendcommand)
+* [Loader](#loader)
+    * [__construct](#__construct-1)
+    * [start](#start)
+* [Validator](#validator)
+    * [isIP](#isip)
+    * [isCIDR](#iscidr)
+    * [isPrivateIP](#isprivateip)
+    * [isReservedIP](#isreservedip)
+    * [isNotPrivateIP](#isnotprivateip)
+    * [isNotReservedIP](#isnotreservedip)
+    * [isURL](#isurl)
+    * [isRegularExpression](#isregularexpression)
+    * [makeCIDR](#makecidr)
+    * [ensureFileIsReadable](#ensurefileisreadable)
+    * [ensureFileIsWritable](#ensurefileiswritable)
+    * [ensureRequiredCfg](#ensurerequiredcfg)
+
+## Controller
+
+The Controller class.
+
+
+
+* Full name: \ExaBGP\VoIPBL\Controller
+
+**See Also:**
+
+* https://github.com/GeertHauwaerts/exabgp-voipbl - exabgp-voipbl
+
+### __construct
+
+Create a new Controller instance.
+
+```php
+Controller::__construct(  ): void
+```
+
+
+
+
+
+
+
+---
+
+### init
+
+Initialize an ExaBGP connection.
+
+```php
+Controller::init(  ): void
+```
+
+
+
+
+
+
+
+---
+
+### loadVersion
+
+Load the ExaBGP version.
+
+```php
+Controller::loadVersion(  ): void
+```
+
+
+
+
+
+
+
+---
+
+### sendCommand
+
+Send an API command to ExaBGP.
+
+```php
+Controller::sendCommand( string $cmd, boolean $response = false ): boolean|string
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$cmd` | **string** | The command to execute. |
+| `$response` | **boolean** | Indicate whether to return the API response. |
+
+
+
+
+---
+
+## Loader
+
+The Loader class.
+
+
+
+* Full name: \ExaBGP\VoIPBL\Loader
+
+**See Also:**
+
+* https://github.com/GeertHauwaerts/exabgp-voipbl - exabgp-voipbl
+
+### __construct
+
+Create a new Loader instance.
+
+```php
+Loader::__construct( string $path = __DIR__, string $cfg = 'voipbl.conf' ): void
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$path` | **string** | The data path. |
+| `$cfg` | **string** | The configuration file name. |
+
+
+
+
+---
+
+### start
+
+Handover the process to ExaBGP.
+
+```php
+Loader::start(  ): void
+```
+
+
+
+
+
+
+
+---
+
+## Validator
+
+The Validator class.
+
+
+
+* Full name: \ExaBGP\VoIPBL\Validator
+
+**See Also:**
+
+* https://github.com/GeertHauwaerts/exabgp-voipbl - exabgp-voipbl
+
+### isIP
+
+Validate an IP address.
+
+```php
+Validator::isIP( string $ip ): boolean
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$ip` | **string** | An IP address. |
+
+
+
+
+---
+
+### isCIDR
+
+Validate an IP/CIDR address.
+
+```php
+Validator::isCIDR( string $ipcidr ): boolean
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$ipcidr` | **string** | An IP/CIDR address. |
+
+
+
+
+---
+
+### isPrivateIP
+
+Validate an RFC1918 IP or IP/CIDR address.
+
+```php
+Validator::isPrivateIP( string $ipcidr ): boolean
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$ipcidr` | **string** | An IP or IP/CIDR address. |
+
+
+
+
+---
+
+### isReservedIP
+
+Validate an RFC1700 IP or IP/CIDR address.
+
+```php
+Validator::isReservedIP( string $ipcidr ): boolean
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$ipcidr` | **string** | An IP or IP/CIDR address. |
+
+
+
+
+---
+
+### isNotPrivateIP
+
+Validate an RFC1918 IP or IP/CIDR address. (negates)
+
+```php
+Validator::isNotPrivateIP( string $ipcidr ): boolean
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$ipcidr` | **string** | An IP or IP/CIDR address. |
+
+
+
+
+---
+
+### isNotReservedIP
+
+Validate an RFC1700 IP or IP/CIDR address. (negates)
+
+```php
+Validator::isNotReservedIP( string $ipcidr ): boolean
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$ipcidr` | **string** | An IP or IP/CIDR address. |
+
+
+
+
+---
+
+### isURL
+
+Validate a URL.
+
+```php
+Validator::isURL( string $url ): boolean
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$url` | **string** | A URL. |
+
+
+
+
+---
+
+### isRegularExpression
+
+Validate a regular expression.
+
+```php
+Validator::isRegularExpression( string $expr ): boolean
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$expr` | **string** | A regular expression. |
+
+
+
+
+---
+
+### makeCIDR
+
+Change an IP into an IP/CIDR.
+
+```php
+Validator::makeCIDR( string $ip ): boolean
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$ip` | **string** | An IP address. |
+
+
+
+
+---
+
+### ensureFileIsReadable
+
+Ensure the given file is readable.
+
+```php
+Validator::ensureFileIsReadable( string $file ): void
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$file` | **string** | The file to read. |
+
+
+
+
+---
+
+### ensureFileIsWritable
+
+Ensure the given file is writable.
+
+```php
+Validator::ensureFileIsWritable( string $file ): void
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$file` | **string** | The file to write to. |
+
+
+
+
+---
+
+### ensureRequiredCfg
+
+Ensure the required configuration parameters are present.
+
+```php
+Validator::ensureRequiredCfg( string $cfg ): void
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$cfg` | **string** | The configuration parameters. |
+
+
+
+
+---
+
+
+
+--------
+> This document was automatically generated from source code comments on 2019-04-24 using [phpDocumentor](http://www.phpdoc.org/) and [cvuorinen/phpdoc-markdown-public](https://github.com/cvuorinen/phpdoc-markdown-public)
diff --git a/phpdoc.xml b/phpdoc.xml
new file mode 100644
index 0000000..17e2992
--- /dev/null
+++ b/phpdoc.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<phpdoc>
+    <title>ExaBGP\VoIPBL Library Documentation</title>
+    <parser>
+        <target>docs/php/build</target>
+    </parser>
+    <transformer>
+        <target>docs/php</target>
+    </transformer>
+    <transformations>
+        <template name="vendor/cvuorinen/phpdoc-markdown-public/data/templates/markdown-public" />
+    </transformations>
+    <files>
+        <directory>src/ExaBGP</directory>
+        <ignore>Exception/*</ignore>
+    </files>
+</phpdoc>
diff --git a/phpunit.xml.dist b/phpunit.xml
similarity index 100%
rename from phpunit.xml.dist
rename to phpunit.xml
diff --git a/src/ExaBGP/VoIPBL/Validator.php b/src/ExaBGP/VoIPBL/Validator.php
index b03e58e..7c384f7 100644
--- a/src/ExaBGP/VoIPBL/Validator.php
+++ b/src/ExaBGP/VoIPBL/Validator.php
@@ -169,7 +169,7 @@ public function isRegularExpression($expr)
     /**
      * Change an IP into an IP/CIDR.
      *
-     * @param string $expr An IP address.
+     * @param string $ip An IP address.
      *
      * @return bool
      */