Send message telegram bot

bot.php

<form method=post>
    <input type=text name='input_message'>
    <input type=submit value='send'>
</form>

<?php
if($_POST){
    
    function sendMessage($message){
        if($message != ''){
        $url = 'https://api.telegram.org/botXXX:ZZZ/sendMessage';
        $data = array('chat_id' => 'zzzzzzzzzz', 'text' => $message);
        $options = array(
            'http' => array(
                'header'  => "Content-type: application/x-www-form-urlencoded\r\n",
                'method'  => 'POST',
                'content' => http_build_query($data)
            )
        );
        $context  = stream_context_create($options);
        $result = file_get_contents($url, false, $context);
        if ($result === FALSE) { /* Handle error */ }
    }

    }

    $message = $_POST['input_message'];
    sendMessage($message);
    // var_dump($result);
}
?>