mysql - Undefined index PHP Error/Warning -


i getting following error on php & mysql application joomla , jomsocial: 

[05-apr-2013 12:23:45 america/denver] php notice:  undefined index: query in /home2 /robervl4/public_html/forum/components/com_community/community.php on line 50

this did not work out of box. application displays products database should, problem error.

here php code of file, line 50 being:

parse_str($parts['query'], $qstring);

code:

// disable format=feed 17jan13 requested fuqaha $mainframe  = jfactory::getapplication(); $jinput     = $mainframe->input; $viewtype = $jinput->request->get('format', 'html','none'); if(strtolower($viewtype)=='feed') { $u = jfactory::geturi(); $parts = parse_url($u->tostring()); parse_str($parts['query'], $qstring); unset($qstring['format']); $parts['query'] = http_build_query($qstring) ;  //recompose url redirect $scheme   = isset($parts['scheme']) ? $parts['scheme'] . '://' : '';  $host     = isset($parts['host']) ? $parts['host'] : '';  $port     = isset($parts['port']) ? ':' . $parts['port'] : '';  $path     = isset($parts['path']) ? $parts['path'] : '';  $query    = isset($parts['query']) ? '?' . $parts['query'] : '';  $fragment = isset($parts['fragment']) ? '#' . $parts['fragment'] : '';   $mainframe->redirect(croute::_("$scheme$host$port$path$query$fragment")); exit('redirecting non-feed page'); }

parse_url include index if has value. i.e., if there no query, $parts['query'] not set. test if set first: if (isset($parts['query'])) parse_str($parts['query'], $qstring);

http://php.net/manual/en/function.parse-url.php


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