Поиск словоформа - [VM1] Общие вопросы и ошибки

$keywordArr = vmGetCleanArrayFromKeyword( $keyword );
// This is the "advanced" search, filter by Keyword1 and Keyword2
$keyword1Arr = vmGetCleanArrayFromKeyword( $keyword1 );
$keyword2Arr = vmGetCleanArrayFromKeyword( $keyword2 );

// This is the "normal" search
if( !empty($keywordArr) ) {
	$sq = "(";
	$numKeywords = count( $keywordArr );
	$i = 1;
	foreach( $keywordArr as $searchstring ) {
		$sq .= "\n (`#__{vm}_product`.`product_name` LIKE '%$searchstring%' OR ";
		$sq .= "\n `#__{vm}_product`.`product_sku` LIKE '%$searchstring%' OR ";
		$sq .= "\n `#__{vm}_product`.`product_s_desc` LIKE '%$searchstring%' OR ";
		$sq .= "\n `#__{vm}_product`.`product_desc` LIKE '%$searchstring%') ";
	
		if( $i++ < $numKeywords ) {
			$sq .= "\n  AND ";
		}
	}
	$sq .= ")";
	$where_clause[] = $sq;
}	

function vmGetCleanArrayFromKeyword( $keyword ) {
	global $database;

	$keywordArr = array();

	if( empty( $keyword )) return $keywordArr;

	$keywords = explode( " ", $keyword, 10 );

	foreach( $keywords as $searchstring ) {
		$searchstring = trim( stripslashes($searchstring) );
		$strlen = strlen($searchstring);
		if( $strlen > 2 ) {


			/*if( $searchstring[0] == "\"" || $searchstring[0]=="'" )  {
				$searchstring[0] = " ";
			}
			if( $searchstring[strlen($searchstring)-1] == "\"" || $searchstring[strlen($searchstring)-1]=="'" ) {
				$searchstring[strlen($searchstring)-1] = " ";
			}*/
			$searchstring = $database->getEscaped( $searchstring );
			$searchstring = str_replace('\"', '"', $searchstring );
			$keywordArr[] = $searchstring;

		}
	}
	return $keywordArr;
}

$searchstring = str_replace('\"', '"', $searchstring );

$searchstring = str_replace("/(.*).$/", "\\2", $searchstring );