$lines = explode("n", $configText);
$tree = [];
$currentKey = null;

foreach ($lines as $row) {
    if (empty($row)) {
        continue;
    } elseif (preg_match('/^s*[(.*?)]s*$/', $row, $matches)) {
        $currentKey = trim($matches[1]);
    } elseif ($currentKey && preg_match('/^(w+)=(.*)/', $row, $matches)) {
        $currentProperty = trim($matches[1]);
        $currentValues = trim($matches[2]);
        $values = [];

        if (preg_match_all('/(w+)=/', $currentValues, $matches)) {
            $values = preg_split('/(w+)=/', $currentValues);
            $values = array_map('trim', $values);

            if (empty($values[0])) {
                unset($values[0]);
            } else {
                array_unshift($matches[1], "");
            }

            $values = array_combine($matches[1], $values);
        } else {
            $values[""] = $currentValues;
        }

        $tree[$currentKey][$currentProperty] = [
            'value' => $currentValues,
            'params' => $values,
        ];
    } else {
        throw new Exception('Unexpected scenario');
    }
}

print_r($tree);