CakePHP Database connection "Mysql" is missing, or could not be created. core.php and bootstrap.php -

CakePHP Database connection "Mysql" is missing, or could not be created. core.php and bootstrap.php -

i have looked answers before posted question, , seems problem in core.php or bootstrap.php file. i've seen said need alter prefixes or that, don't understand should alter them to. can help me please? here error page:

database connection "mysql" missing, or not created. error: internal error has occurred.

stack trace core/cake/model/datasource/dbosource.php line 260 → mysql->connect() core/cake/model/connectionmanager.php line 105 → dbosource->__construct(array) core/cake/model/model.php line 3476 → connectionmanager::getdatasource(string) core/cake/model/model.php line 1126 → model->setdatasource(string) core/cake/model/model.php line 3498 → model->setsource(string) core/cake/model/model.php line 1355 → model->getdatasource() core/cake/view/helper/formhelper.php line 207 → model->schema() core/cake/view/helper/formhelper.php line 459 → formhelper->_introspectmodel(string, string) app/view/layouts/default.ctp line 85 → formhelper->create(string, array) core/cake/view/view.php line 935 → include(string) core/cake/view/view.php line 897 → view->_evaluate(string, array) core/cake/view/view.php line 529 → view->_render(string) core/cake/view/view.php line 474 → view->renderlayout(string, string) core/cake/controller/controller.php line 952 → view->render(string, null) app/controller/pagescontroller.php line 69 → controller->render(string) [internal function] → pagescontroller->display(string) core/cake/controller/controller.php line 490 → reflectionmethod->invokeargs(pagescontroller, array) core/cake/routing/dispatcher.php line 185 → controller->invokeaction(cakerequest) core/cake/routing/dispatcher.php line 160 → dispatcher->_invoke(pagescontroller, cakerequest, cakeresponse) app/webroot/index.php line 108 → dispatcher->dispatch(cakerequest, cakeresponse)

have proper connection between site , database? reason can think of issue. check you're configuration settings in database.php file

php mysql cakephp cakephp-2.0