1. Go to this page and download the library: Download phpawcom/ismartsms library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
if(IsmartSMS::SendSMS('{8 digits phone number}', '{SMS Content}')){
// TODO: SMS has been sent, some action here
}else{
// TODO: SMS couldn't be sent, some action here
}