Telegram bot mini

telegram.php

<?php
// Telegram bot
// https://gist.github.com/TrywaR/2e0bdad504545ed61a1ebb1059bd7fce
// _____
// INFO
// Create bot go to telegram chat @BotFather
// send message "/createbot"
// copy and add ApiKey
// user send message to new bot
// and that bot send message to user, user go to chat witch bot, send message /start
// Telegram->send_to_user(message,username);
// %2b - adaptation sign +

class Telegram
{
    static $sApiKey = ''; # Telegram API key
    static $sChatId = ''; # chatid for responce message
    static $sUserName = ''; # username for response message
    public $sApiUrl = "https://api.telegram.org/bot";

    // Bot messages response
    function get_bot(): string
    {
        $sUrl = $this->sApiUrl . $this->sApiKey . "/getUpdates";
        return file_get_contents($sUrl);
    }

    // Bot get chat id for username
    function get_chat_id(String $sUserName): string
    {
        if (empty($sUserName)) die('Error: not parametre sUserName');
        $oBot = json_decode($this->get_bot());
        if (empty($oBot->result[0])) die('Error: not result');
        foreach ($oBot->result as $oMessageResult) {
            if (empty($oMessageResult->message)) continue;
            foreach ($oMessageResult->message as $sKey => $oMessage) {
                if ($sKey=='from' ){
                    if ($oMessage->username == $sUserName) {
                        return $oMessage->id;
                    }
                }
            }
        }
        die('Error: not find id');
    }

    // Bot send message to chat id
    function send_to_chat(String $sMessage, String $sChatId): bool
    {
        if (empty($sMessage)) die('Error: not parametre sMessage');
        if (empty($sChatId)) {
            if (empty($this->sChatId)) die('Error: not parametre sChatId');
            else $sChatId = $this->sChatId;
        }
        if ($this->send($sMessage, $sChatId)) return true;
        else return false;
    }

    // Bot send message to username
    function send_to_user(String $sMessage, String $sUserName): bool
    {
        if (empty($sMessage)) die('Error: not parametre sMessage');
        if (empty($sUserName)) {
            if (empty($this->sUserName)) die('Error: not parametre sUserName');
            else $sUserName = $this->sUserName;
        }
        $sChatId = $this->get_chat_id($sUserName);
        if ($this->send($sMessage, $sChatId)) return true;
        else return false;
    }

    // Bot only send message
    function send(String $sMessage, String $sChatId): bool
    {
        $sUrl = $this->sApiUrl . $this->sApiKey . "/sendMessage?chat_id=$sChatId&parse_mode=Markdown&text=$sMessage";
        if (file_get_contents($sUrl)) return false;
        return true;
    }

    function __construct(String $sApiKey)
    {
        $this->sApiKey = $sApiKey;
    }
}