Baikal\Core\Tools::assertEnvironmentIsOk PHP Method

    static function assertEnvironmentIsOk()
    {
        # Asserting Baikal Context
        if (!defined("BAIKAL_CONTEXT") || BAIKAL_CONTEXT !== true) {
            die("Bootstrap.php may not be included outside the Baikal context");
        }
        # Asserting PDO
        if (!defined('PDO::ATTR_DRIVER_NAME')) {
            die('Baikal Fatal Error: PDO is unavailable. It\'s required by Baikal.');
        }
        # Asserting PDO::SQLite or PDO::MySQL
        $aPDODrivers = \PDO::getAvailableDrivers();
        if (!in_array('sqlite', $aPDODrivers) && !in_array('mysql', $aPDODrivers)) {
            die('<strong>Baikal Fatal Error</strong>: Both <strong>PDO::sqlite</strong> and <strong>PDO::mysql</strong> are unavailable. One of them at least is required by Baikal.');
        }
    }

 public static function bootstrap()
 {
     # Registering Baikal classloader
     define("BAIKAL_PATH_FRAMEWORKROOT", dirname(__FILE__) . "/");
     \Baikal\Core\Tools::assertEnvironmentIsOk();
     \Baikal\Core\Tools::configureEnvironment();
     # Check that a config file exists
     if (!file_exists(PROJECT_PATH_SPECIFIC . "config.php") || !file_exists(PROJECT_PATH_SPECIFIC . "config.system.php")) {
         self::installTool();
     } else {
         require_once PROJECT_PATH_SPECIFIC . "config.php";
         require_once PROJECT_PATH_SPECIFIC . "config.system.php";
         date_default_timezone_set(PROJECT_TIMEZONE);
         # Check that Baïkal is already configured
         if (!defined("BAIKAL_CONFIGURED_VERSION")) {
             self::installTool();
         } else {
             # Check that running version matches configured version
             if (version_compare(BAIKAL_VERSION, BAIKAL_CONFIGURED_VERSION) > 0) {
                 self::installTool();
             } else {
                 # Check that admin password is set
                 if (!defined("BAIKAL_ADMIN_PASSWORDHASH")) {
                     self::installTool();
                 }
                 \Baikal\Core\Tools::assertBaikalIsOk();
                 set_error_handler("\\Baikal\\Framework::exception_error_handler");
             }
         }
     }
 }