/**
* Parses search keywords.
*
* @param string $keywordString
*/
protected static function parseKeywords($keywordString)
{
// convert encoding if necessary
if (CHARSET == 'UTF-8' && !StringUtil::isASCII($keywordString) && !StringUtil::isUTF8($keywordString)) {
$keywordString = StringUtil::convertEncoding('ISO-8859-1', 'UTF-8', $keywordString);
}
// remove bad wildcards
$keywordString = preg_replace('/(?<!\\w)\\*/', '', $keywordString);
// remove search operators
$keywordString = preg_replace('/[\\+\\-><()~]+/', '', $keywordString);
if (StringUtil::substring($keywordString, 0, 1) == '"' && StringUtil::substring($keywordString, -1) == '"') {
// phrases search
$keywordString = StringUtil::trim(StringUtil::substring($keywordString, 1, -1));
if (!empty($keywordString)) {
self::$keywords = array_merge(self::$keywords, array(StringUtil::encodeHTML($keywordString)));
}
} else {
// replace word delimiters by space
$keywordString = preg_replace('/[.,]/', ' ', $keywordString);
$keywords = ArrayUtil::encodeHTML(ArrayUtil::trim(explode(' ', $keywordString)));
if (count($keywords) > 0) {
self::$keywords = array_merge(self::$keywords, $keywords);
}
}
}
