/**
* takes the search string as originally input by a user and makes it "better", in the sense
* that for example converts it to "term1 AND term2" instead of "term1 OR term2" which is the
* default behaviour. In order to do so, the "+" operator must be added before each one of the
* search terms as long as it is not already there.
*
* @param searchTerms The original search string
* @return Returns an 'improved' version of the search terms
*/
function _adaptSearchString($searchTerms)
{
// load this module only if needed...
include_once PLOG_CLASS_PATH . "class/data/textfilter.class.php";
$tf = new Textfilter();
$resultTerms = $tf->filterCharacters($searchTerms, array('"', ';', '.'));
$resultTerms = Db::qstr($resultTerms);
$resultTerms = trim($resultTerms);
return $resultTerms;
}
