Add a simple debug command that outputs general info about the bot and the server environment.

src/Commands/AdminCommands/DebugCommand.php

+<?php
+/**
+ * This file is part of the TelegramBot package.
+ *
+ * (c) Avtandil Kikabidze aka LONGMAN <akalongman@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Longman\TelegramBot\Commands\AdminCommands;
+
+use Longman\TelegramBot\Commands\AdminCommand;
+use Longman\TelegramBot\DB;
+use Longman\TelegramBot\Request;
+
+/**
+ * Admin "/debug" command
+ */
+class DebugCommand extends AdminCommand
+{
+    /**
+     * @var string
+     */
+    protected $name = 'debug';
+
+    /**
+     * @var string
+     */
+    protected $description = 'Debug command to help find issues';
+
+    /**
+     * @var string
+     */
+    protected $usage = '/debug';
+
+    /**
+     * @var string
+     */
+    protected $version = '1.0.0';
+
+    /**
+     * Command execute method
+     *
+     * @return mixed
+     * @throws \Longman\TelegramBot\Exception\TelegramException
+     */
+    public function execute()
+    {
+        $pdo = DB::getPdo();
+        $message = $this->getMessage();
+        $chat_id = $message->getChat()->getId();
+
+        $debug_info = [];
+
+        $debug_info[] = sprintf('_TelegramBot version_: `%s`', $this->telegram->getVersion());
+
+        $php_bit = '';
+        PHP_INT_SIZE === 4 && $php_bit = ' (32bit)';
+        PHP_INT_SIZE === 8 && $php_bit = ' (64bit)';
+        $debug_info[] = sprintf('_PHP version_: `%1$s%2$s; %3$s; %4$s`', PHP_VERSION, $php_bit, PHP_SAPI, PHP_OS);
+        $debug_info[] = sprintf('_Maximum PHP script execution time_: `%d seconds`', ini_get('max_execution_time'));
+
+        $mysql_version = $pdo ? $pdo->query('SELECT VERSION() AS version')->fetchColumn() : null;
+        $debug_info[] = sprintf('_MySQL version_: `%s`', $mysql_version ?: 'disabled');
+
+        $debug_info[] = sprintf('_Operating System_: `%s`', php_uname());
+
+        if (isset($_SERVER['SERVER_SOFTWARE'])) {
+            $debug_info[] = sprintf('_Web Server_: `%s`', $_SERVER['SERVER_SOFTWARE']);
+        }
+        if (function_exists('curl_init')) {
+            $curlversion = curl_version();
+            $debug_info[] = sprintf('_curl version_: `%1$s; %2$s`', $curlversion['version'], $curlversion['ssl_version']);
+        }
+
+        $debug_info[] = '_Webhook Info_:';
+        try {
+            $webhook_info = json_encode(json_decode(Request::getWebhookInfo(), true)['result'], JSON_PRETTY_PRINT);
+        } catch (\Exception $e) {
+            $webhook_info = sprintf('Failed to get webhook info! (%s)', $e->getMessage());
+        }
+        $debug_info[] = sprintf("```\n%s\n```", $webhook_info);
+
+        $data = [
+            'chat_id'    => $chat_id,
+            'parse_mode' => 'Markdown',
+            'text'       => implode(PHP_EOL, $debug_info),
+        ];
+
+        return Request::sendMessage($data);
+    }
+}