small fixes, readme updated

README.md

@@ -1,3 +1,8 @@
+[![Latest Stable Version](https://poser.pugx.org/evilfreelancer/routeros-api-php/v/stable)](https://packagist.org/packages/evilfreelancer/routeros-api-php)
+[![Total Downloads](https://poser.pugx.org/evilfreelancer/routeros-api-php/downloads)](https://packagist.org/packages/evilfreelancer/routeros-api-php)
+[![License](https://poser.pugx.org/evilfreelancer/routeros-api-php/license)](https://packagist.org/packages/evilfreelancer/routeros-api-php)
+[![Scrutinizer CQ](https://scrutinizer-ci.com/g/evilfreelancer/routeros-api-php/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/evilfreelancer/routeros-api-php/)
+
 # RouterOS PHP7 API Client
 
     composer require evilfreelancer/routeros-api-php
@@ -54,6 +59,42 @@ $response = $client->write($query)->read();
 var_dump($response);
 ```
 
+### How to write queries
+
+You can write absolutely any queries to your router, for this you
+need to create a "Query" object whose first argument is the
+required command, after this you can add the attributes of the
+command to "Query" object.
+
+More about attributes and "words" from which this attributes
+should be created [here](https://wiki.mikrotik.com/wiki/Manual:API#Command_word). 
+
+```php
+use \RouterOS\Query;
+
+// One line query: Get all packages
+$query = new Query('/system/package/getall');
+
+// Multiline query: Enable interface and add tag
+$query = new Query('/interface/set');
+$query
+    ->add('=disabled=no')
+    ->add('=.id=ether1')
+    ->add('.tag=4');
+
+// Multiline query: Get all ethernet and VLAN interfaces
+$query = new Query('/interface/print');
+$query
+    ->add('?type=ether')
+    ->add('?type=vlan')
+    ->add('?#|');
+
+// Multiline query: Get all routes that have non-empty comment
+$query = new Query('/ip/route/print');
+$query
+    ->add('?>comment=');
+```
+
 ## Links
 
 * [Cloud Hosted Router](https://mikrotik.com/download#chr) - Virtual images of RouterOS for your hypervisor 

src/Client.php

@@ -89,10 +89,9 @@ class Client implements Interfaces\ClientInterface
      * Send write query to RouterOS (with or without tag)
      *
      * @param   Query $query
-     * @param   string|null $tag
      * @return  ClientInterface
      */
-    public function write(Query $query, string $tag = null): ClientInterface
+    public function write(Query $query): ClientInterface
     {
         // Send commands via loop to router
         foreach ($query->getQuery() as $command) {
@@ -100,11 +99,6 @@ class Client implements Interfaces\ClientInterface
             fwrite($this->_socket, $this->encodeLength(\strlen($command)) . $command);
         }
 
-        // If tag is not empty, send to socket
-        if (null !== $tag) {
-            fwrite($this->_socket, $this->encodeLength(\strlen('.tag=' . $tag)) . '.tag=' . $tag);
-        }
-
         // Write zero-terminator
         fwrite($this->_socket, \chr(0));
 

src/Interfaces/ClientInterface.php

@@ -62,9 +62,8 @@ interface ClientInterface
      * Send write query to RouterOS (with or without tag)
      *
      * @param   Query $query
-     * @param   string|null $tag
      * @return  ClientInterface
      */
-    public function write(Query $query, string $tag = null): ClientInterface;
+    public function write(Query $query): ClientInterface;
 
 }