[SOLVED]: "Notice: Use of undefined constant DS - assumed 'DS' in"
The DS constant has been removed in Joomla 3. If you really need it you can use DIRECTORY_SEPARATOR instead or insert the below code in your php file.
<?php /* BEGIN: for joomla 3 projects */ JLoader::import( "joomla.version" ); $version = new JVersion(); if (!version_compare( $version->RELEASE, "2.5", "<=")) : if (!defined("DS")): define("DS", DIRECTORY_SEPARATOR); endif; endif; /* END: for joomla 3 projects */ ?>
Also there is a joomla plugin, named "DS Constant Plugin", to fix this issue.