System Requirements

BlaB! AX Pro is a web app that runs on a web server. The requirements are minimal.

• Any Linux / Windows host or a shared hosting service with a web server (Apache, Nginx), PHP and MySQL.
• PHP JSON - JSON is bundled from PHP7 on, if you are still running PHP5 - PHP json extension enabled.
• Optional: PHP fileinfo extension enabled in order to recognize file types incl. uploaded avatars.
• Optional: php_curl - required for VPN/ProxyGuard.
• Optional: php_curl or php.ini allow_url_fopen = On
• Optional: shell_exec enabled in php.ini and ffmpeg - required to create thumbnails for voice and video messages.

Wikipedia: Apache ꞏ PHP ꞏ MySQL

Not sure what you have? Upload on your webhost a PHP file - info.php with content <?php phpinfo();?> and navigate to it with your browser. You'll see a detailed information about your server configuration. CTRL+F and search the page for mysqli, json and fileinfo.