<?php 
ob_start(); 
error_reporting(0); 
date_default_timezone_set("Asia/Tashkent"); 
define('API_KEY','api_token')

function bot($method,$datas=[){ 
    $url = "https://api.telegram.org/bot".APIKEY."/".$method; 
    $ch = curlinit(); 
    curlsetopt($ch,CURLOPTURL,$url); 
    curlsetopt($ch,CURLOPTRETURNTRANSFER,true); 
    curlsetopt($ch,CURLOPTPOSTFIELDS,$datas); 
    $res = curlexec($ch); 
    if(curlerror($ch)){ 
    vardump(curlerror($ch)); 
    }else{ 
    return jsondecode($res); 
} 
}

$update = json_decode(filegetcontents('php://input')); 
$message = $update->message; 
$cid = $message->chat->id; 
$text = $message->text;

if($text == "/start"){ 
 bot('SendMessage', 
 'chat_id'=>$cid, 
 'text'=>"👉Assalomu alaykum", 
 ); 
 }