Code refactoring by @MASNathan

Author: josantonius

.gitignore

@@ -9,3 +9,4 @@ docs/*.pyc
 .git*/
 .idea
 .DS_STORE
+vendor

composer.json

@@ -36,7 +36,7 @@
     },
     "autoload": {
         "psr-4": {
-            "Josantonius\\Ip\\": "src/Ip/"
+            "Josantonius\\Ip\\": "src/"
         }
     },
     "extra": {

src/Ip.php

@@ -0,0 +1,92 @@
+<?php
+/**
+ * PHP class to get user IP.
+ *
+ * @author     Tobias Sette Class - http://github.com/gnumoksha
+ * @author     Josantonius - hello@josantonius.com
+ * @copyright  Copyright (c) 2017
+ * @license    https://opensource.org/licenses/MIT - The MIT License (MIT)
+ * @link       https://github.com/Josantonius/PHP-Ip
+ * @since      1.0.0
+ */
+
+namespace Josantonius\Ip;
+
+/**
+ * IP handler.
+ *
+ * @since 1.0.0
+ */
+class Ip
+{
+    /**
+     * Gets the key value from globals
+     *
+     * @since 1.1.3
+     *
+     * @param string $key
+     *
+     * @return string|null
+     */
+    protected static function getGlobalValue($key)
+    {
+        if (isset($_SERVER[$key]) && static::validate($_SERVER[$key])) {
+            return $_SERVER[$key];
+        }
+
+        if (isset($_ENV[$key]) && static::validate($_ENV[$key])) {
+            return $_ENV[$key];
+        }
+
+        if (@getenv($key) && static::validate(getenv($key))) {
+            return getenv($key);
+        }
+
+        return null;
+    }
+
+    /**
+     * Get user's ip
+     *
+     * @since 1.0.0
+     *
+     * @return string|false → user IP
+     */
+    public static function get()
+    {
+        $possibleKeys = [
+            'HTTP_X_FORWARDED_FOR',
+            'HTTP_X_FORWARDED',
+            'HTTP_X_CLUSTER_CLIENT_IP',
+            'HTTP_FORWARDED_FOR',
+            'HTTP_FORWARDED',
+            'HTTP_VIA',
+            'HTTP_X_COMING_FROM',
+            'HTTP_COMING_FROM',
+            'HTTP_X_REAL_IP',
+            'REMOTE_ADDR',
+        ];
+
+        foreach ($possibleKeys as $key) {
+            if ($ip = static::getGlobalValue($key)) {
+                return $ip;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Validate ip.
+     *
+     * @since 1.1.3
+     *
+     * @param string $ip
+     *
+     * @return boolean
+     */
+    public static function validate($ip)
+    {
+        return filter_var($ip, FILTER_VALIDATE_IP) ? true : false;
+    }
+}

src/Ip/Ip.php

@@ -1,28 +1,29 @@
-<?php 
+<?php
 /**
  * PHP class to get user IP.
- * 
- * @author     Tobias Sette Class - http://github.com/gnumoksha 
+ *
+ * @author     Tobias Sette Class - http://github.com/gnumoksha
  * @author     Josantonius - hello@josantonius.com
  * @copyright  Copyright (c) 2017
  * @license    https://opensource.org/licenses/MIT - The MIT License (MIT)
  * @link       https://github.com/Josantonius/PHP-Ip
  * @since      1.1.4
  */
 
-function includeIfExists($file) {
-
+function includeIfExists($file)
+{
     if (file_exists($file)) {
-        
+
         return include $file;
     }
 }
 
-if ((!$loader = includeIfExists(__DIR__ . '/../vendor/autoload.php')) && 
-	(!$loader = includeIfExists(__DIR__ . '/../../../autoload.php'))) {
-    
+if ((!$loader = includeIfExists(__DIR__ . '/../vendor/autoload.php')) &&
+    (!$loader = includeIfExists(__DIR__ . '/../../../autoload.php'))
+) {
+
     die(PHP_EOL . 'You must set up the project dependencies, ' .
-    	'run the following commands:' . PHP_EOL .
+        'run the following commands:' . PHP_EOL .
         PHP_EOL . 'curl -s http://getcomposer.org/installer | php' . PHP_EOL .
         PHP_EOL . 'php composer.phar install' . PHP_EOL . PHP_EOL);
 }