msg_processing_simple.php

<?php
/*
 * Telegram Bot Sample
 * ===================
 * UWiClab, University of Urbino
 * ===================
 * Basic message processing functionality,
 * used by both pull and push scripts.
 *
 * Put your custom bot intelligence here!
 */

// This file assumes to be included by pull.php or
// hook.php right after receiving a new message.
// It also assumes that the message data is stored
// inside a $message variable.

// Message object structure: {
//     "message_id": 123,
//     "from": {
//       "id": 123456789,
//       "first_name": "First",
//       "last_name": "Last",
//       "username": "FirstLast"
//     },
//     "chat": {
//       "id": 123456789,
//       "first_name": "First",
//       "last_name": "Last",
//       "username": "FirstLast",
//       "type": "private"
//     },
//     "date": 1460036220,
//     "text": "Text"
//   }
$message_id = $message['message_id'];
$chat_id = $message['chat']['id'];
$from_id = $message['from']['id'];

if (isset($message['text'])) {
    // We got an incoming text message
    $text = $message['text'];

    if (strpos($text, "/start") === 0) {
        echo 'Received /start command!' . PHP_EOL;

        telegram_send_message($chat_id, 'This is your first Telegram bot, welcome!');
    }
    else {
        echo "Received message: $text" . PHP_EOL;

        // Do something else...
    }
}
else {
    telegram_send_message($chat_id, 'Sorry, I understand only text messages at the moment!');
}
?>