Enabled santizing input before validation

app/Http/Requests/CreateDocumentRequest.php

@@ -23,4 +23,22 @@ class CreateDocumentRequest extends DocumentRequest
             //'file' => 'mimes:jpg'
         ];
     }
+
+    /**
+     * Sanitize input before validation.
+     *
+     * @return array
+     */
+     /*
+    public function sanitize()
+    {
+        $input = $this->all();
+
+        $input['phone'] = 'test123';
+
+        $this->replace($input);
+
+        return $this->all();
+    }
+    */
 }

app/Http/Requests/Request.php

@@ -2,8 +2,34 @@
 
 use Illuminate\Foundation\Http\FormRequest;
 
+// https://laracasts.com/discuss/channels/general-discussion/laravel-5-modify-input-before-validation/replies/34366
 abstract class Request extends FormRequest {
 
-	//
-
+    /**
+     * Validate the input.
+     *
+     * @param  \Illuminate\Validation\Factory  $factory
+     * @return \Illuminate\Validation\Validator
+     */
+    public function validator($factory)
+    {
+        return $factory->make(
+            $this->sanitizeInput(), $this->container->call([$this, 'rules']), $this->messages()
+        );
+    }
+
+    /**
+     * Sanitize the input.
+     *
+     * @return array
+     */
+    protected function sanitizeInput()
+    {
+        if (method_exists($this, 'sanitize'))
+        {
+            return $this->container->call([$this, 'sanitize']);
+        }
+
+        return $this->all();
+    }
 }