Added unset webhook

README.md

@@ -331,7 +331,8 @@ You can overwrite the default Upload and Download directory with:
 $telegram->setDownloadPath("yourpath/Download");
 $telegram->setUploadPath("yourpath../Upload");    
 ```
-
+###Unset Webhook
+Edit *example-unset.php* with your credential and execute it.  
 ### Logging
 Thrown Exception are stored in TelegramException.log file (in the base directory).
 

example-unset.php

+<?php
+//Composer Loader
+$loader = require __DIR__.'/vendor/autoload.php';
+
+$API_KEY = 'your_bot_api_key';
+$BOT_NAME = 'namebot';
+try {
+    // create Telegram API object
+    $telegram = new Longman\TelegramBot\Telegram($API_KEY, $BOT_NAME);
+    // set webhook
+    $result = $telegram->unsetWebHook();
+    //Uncomment to use certificate
+    //$result = $telegram->setWebHook($link, $path_certificate);
+    if ($result->isOk()) {
+        echo $result->getDescription();
+    }
+} catch (Longman\TelegramBot\Exception\TelegramException $e) {
+    echo $e;
+}

src/Request.php

@@ -395,11 +395,8 @@ class Request
         return $result;
     }
 
-    public static function setWebhook($url, $file = null)
+    public static function setWebhook($url='', $file = null)
     {
-        if (empty($url)) {
-            throw new TelegramException('Url is empty!');
-        }
         $data['url'] = $url;
 
         if (!is_null($file)) {

src/Telegram.php

@@ -716,6 +716,23 @@ class Telegram
         return $result;
     }
 
+    /**
+     * Unset Webhook for bot
+     *
+     * @return string
+     */
+    public function unsetWebHook()
+    {
+        $result = Request::setWebhook();
+
+        if (!$result->isOk()) {
+            throw new TelegramException(
+                'Webhook was not unset! Error: '.$result->getErrorCode().' '. $result->getDescription()
+            );
+        }
+
+        return $result;
+    }
     /**
      * Get available message types
      *