Watchdog. Will notify you if your bot is down.

tg-bots-watchdog.php

  <?php    
    $message = '';
    
    $botoneHook = file_get_contents('https://api.telegram.org/bot___FIRST_BOT_API_KEY___/getWebhookInfo');
    $bottwoHook = file_get_contents('https://api.telegram.org/bot___SECOND_BOT_API_KEY___/getWebhookInfo');
    
    $botOne = !empty($botoneHook) && !empty(json_decode($botoneHook, true)) && !empty(json_decode($botoneHook, true)['result']['pending_update_count']) && json_decode($botoneHook, true)['result']['pending_update_count'] > 5?
                json_decode($botoneHook, true)['result']:'ok';
    $botTwo = !empty($bottwoHook) && !empty(json_decode($bottwoHook, true)) && !empty(json_decode($bottwoHook, true)['result']['pending_update_count']) && json_decode($bottwoHook, true)['result']['pending_update_count'] > 5?
                json_decode($bottwoHook, true)['result']:'ok';
    
    if($botTwo == 'ok' && $botOne == 'ok') exit();
    
    if($botOne != 'ok' && !empty($botOne) && is_array($botOne)){
      $botOne = sprintf('🆘 BotOneBot errors count - %s, last one occurred %s - (%s)',
          $botOne['pending_update_count'],
          date("H:i:s", $botOne['last_error_date']),
          $botOne['last_error_message']
      );
    }
    if($botTwo != 'ok' && !empty($botTwo) && is_array($botTwo)){
      $botTwo = sprintf('🆘 BotTwoBot errors count - %s, last one occurred %s - (%s)',
          $botTwo['pending_update_count'],
          date("H:i:s", $botTwo['last_error_date']),
          $botTwo['last_error_message']
      );
    }
    
    $message .= trim(($botTwo != 'ok'?$botTwo:'').PHP_EOL.($botOne != 'ok'?$botOne:''));
    
    $fields_string = '';
    $url = 'https://api.telegram.org/bot___SENDER_BOT_API_KEY___/sendMessage'; // Sender bot api key
    $fields = array(
        'chat_id' => urlencode('___YOUR_TG_ID___'),
        'text' => urlencode(''.$message)
    );
    
    //url-ify the data for the POST
    foreach($fields as $key=>$value) { $fields_string .= $key.'='.$value.'&'; }
    rtrim($fields_string, '&');
    
    //open connection
    $ch = curl_init();
    
    //set the url, number of POST vars, POST data
    curl_setopt($ch,CURLOPT_URL, $url);
    curl_setopt($ch,CURLOPT_POST, count($fields));
    curl_setopt($ch,CURLOPT_POSTFIELDS, $fields_string);
    
    //execute post
    $result = curl_exec($ch);
    
    //close connection
    curl_close($ch);
    
    exit();