yii\mongodb\QueryBuilder::buildLikeCondition PHP Метод

    public function buildLikeCondition($operator, $operands)
    {
        if (!isset($operands[0], $operands[1])) {
            throw new InvalidParamException("Operator '{$operator}' requires two operands.");
        }
        list($column, $value) = $operands;
        if (!$value instanceof Regex) {
            $value = new Regex(preg_quote($value), 'i');
        }
        return [$column => $value];
    }