CAllSearchQuery::GetQueryString

function GetQueryString($fields, $query, $bTagsSearch = false, $bUseStemming = true, $bErrorOnEmptyStem = false)
{
	$this->m_words = Array();
	$this->m_fields = explode(",", $fields);

	$this->bTagsSearch = $bTagsSearch;
	//In case there is no masks used we'll keep list
	//of all tags in this member
	//to perform optimization
	$this->m_tags_words = array();

	$this->m_query = $query = $this->CutKav($query);

	//Assume query does not have any word which can be stemmed
	$this->bStemming = false;
	if (!$this->bTagsSearch && $bUseStemming && COption::GetOptionString("search", "use_stemming") == "Y")
	{
		//In case when at least one word found: $this->bStemming = true
		$stem_query = $this->StemQuery($query, $this->m_lang);
		if ($this->bStemming === true || $bErrorOnEmptyStem)
			$query = $stem_query;
	}
	$this->m_parsed_query = $query = $this->ParseQ($query);

	if ($query == "( )" || $query == '')
	{
		$this->error = GetMessage("SEARCH_ERROR3");
		$this->errorno = 3;
		return false;
	}

	$query = $this->PrepareQuery($query);

	return $query;
}