PhpStorm is a lightweight and smart PHP IDE focused on developer productivity that deeply understands your code, provides smart code completion, quick navigation and on-the-fly error checking. It is always ready to help you shape your code, run unit-tests or provide visual debugging.
In order to use PhpStorm with CUBRID all that is needed is to install the CUBRID PHP Driver according to your PHP version and operating system. All the installation instructions are available here: http://www.cubrid.org/wiki_apis/entry/cubrid-php-driver-installation-instructions
Check out examples of usage here: http://www.cubrid.org/blog/cubrid-appstools/best-php-ide-phpstorm-now-supports-cubrid-api-syntax/