Move custom libs to the source tree

libs/SimpleValidator/Validators/Ip.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace SimpleValidator\Validators;
+
+class Ip extends Base
+{
+    public function execute(array $data)
+    {
+        if ($this->isFieldNotEmpty($data)) {
+            return filter_var($data[$this->field], FILTER_VALIDATE_IP) !== false;
+        }
+
+        return true;
+    }
+}