/home/smartonegroup/www/system/install/ajax_c.php
<?php
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
require 'base.php';
$data = posted_data() ?? [];
$appurl = $data['appurl'] ?? '';
$db_host = $data['dbhost'] ?? '';
$db_user = $data['dbuser'] ?? '';
$db_password = $data['dbpass'] ?? '';
$db_name = $data['dbname'] ?? '';

$_SESSION['db_host'] = $db_host;
$_SESSION['db_user'] = $db_user;
$_SESSION['db_password'] = $db_password;
$_SESSION['db_name'] = $db_name;

$purchase_key = $data['purchase_key'] ?? '';

$_SESSION['purchase_key'] = $purchase_key;

if ($appurl === '' or $db_host === '' or $db_user === '' or $db_name === '') {
    echo 'Please input all the information and try again.';
    exit();
}

$link = mysqli_connect($db_host, $db_user, $db_password, $db_name);

if (!$link) {
    echo "Error: Unable to connect to MySQL." . PHP_EOL;
    echo "Debugging error: " . mysqli_connect_error() . PHP_EOL;
    exit();
}

try {
    $dbh = new pdo(
        "mysql:host=$db_host;dbname=$db_name",
        "$db_user",
        "$db_password",
        [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]
    );

    // database connection successful

    //create config file

    $input =
        '<?php
define(\'DB_HOST\', \'' .
        $db_host .
        '\'); # Database Host
define(\'DB_PORT\', \'\'); # Database Port. Keep it blank if you are un sure.
define(\'DB_USER\', \'' .
        $db_user .
        '\'); # Database Username
define(\'DB_PASSWORD\', \'' .
        $db_password .
        '\'); # Database Password
define(\'DB_NAME\', \'' .
        $db_name .
        '\'); # Database Name
define(\'APP_URL\', \'' .
        $appurl .
        '\'); # Application URL.
#Please include http and do not use trailing slash after the url. For example use in this format- http://www.example.com Or http://www.example.com/finance
define(\'APP_STAGE\', \'Live\'); # Change Live to Dev to enable Debug
';

    $f_msg =
        'Can\'t create config file. The folder is not writable. You will have to manually create config file. Create a <strong>config.php</strong> inside- <strong>system</strong> folder with following contents- <hr>
<textarea rows="10" class="form-control">' .
        $input .
        '</textarea>
<span class="help-block">CloudOnex requires some folders writable. It seems folders are not writable. The App may not work properly. For common troubleshooting tips, please visit- <strong><a href="https://www.cloudonex.com/doc/general/troubleshooting" target="_blank">https://www.cloudonex.com/doc/general/troubleshooting</a></strong></span>
';

    $wConfig = "../system/config.php";

    if (file_exists($wConfig)) {
        echo 'Config file exist. Please delete- <strong>system/config.php</strong> and try again.';
        exit();
    }

    ($fh = fopen($wConfig, 'w')) or die($f_msg);
    fwrite($fh, $input);
    fclose($fh);

    echo '1';
} catch (PDOException $e) {
    echo 'Connection failed: ' . $e->getMessage();
    exit();
}
Path: home/smartonegroup/www/system/install