SimpleSAML_Configuration::getBaseDir PHP Method

    public function getBaseDir()
    {
        // check if a directory is configured in the configuration file
        $dir = $this->getString('basedir', null);
        if ($dir !== null) {
            // add trailing slash if it is missing
            if (substr($dir, -1) !== DIRECTORY_SEPARATOR) {
                $dir .= DIRECTORY_SEPARATOR;
            }
            return $dir;
        }
        // the directory wasn't set in the configuration file, path is <base directory>/lib/SimpleSAML/Configuration.php
        $dir = __FILE__;
        assert('basename($dir) === "Configuration.php"');
        $dir = dirname($dir);
        assert('basename($dir) === "SimpleSAML"');
        $dir = dirname($dir);
        assert('basename($dir) === "lib"');
        $dir = dirname($dir);
        // Add trailing directory separator
        $dir .= DIRECTORY_SEPARATOR;
        return $dir;
    }