PhpCsFixer\ToolInfo::getScriptDir PHP Method

    private static function getScriptDir()
    {
        static $result;
        if (null === $result) {
            $script = $_SERVER['SCRIPT_NAME'];
            if (is_link($script)) {
                $linkTarget = readlink($script);
                // If the link target is relative to the link
                if (false === realpath($linkTarget)) {
                    $linkTarget = dirname($script) . '/' . $linkTarget;
                }
                $script = $linkTarget;
            }
            $result = dirname($script);
        }
        return $result;
    }