timw4mail / HummingBirdAnimeClient

        $operator_string = $operator_token['content'];

        $operator_code = $operator_token['code'];

        if ($operator_string !== strtoupper($operator_string)) {

            $error_message = 'Logical operator should be in upper case;'

                . ' use "' . strtoupper($operator_string)

                . '" instead of "' . $operator_string . '"';

            $phpcsFile->addError($error_message, $stackPtr, 'LowercaseLogicalOperator');

        }

        $warning_message = 'The symbolic form "&&" is preferred over the literal form "AND"';

        $phpcsFile->addWarning($warning_message, $stackPtr, 'UseOfLiteralAndOperator');

            $phpcsFile->addError($error_message, $stackPtr, 'UseOf||InsteadOfOR');

        }

        // it is literal, if it is not symbolic

        else if ($operator_string !== strtoupper($operator_string)) {

            $error_message = 'Logical operator should be in upper case;'

                . ' use "' . strtoupper($operator_string)

                . '" instead of "' . $operator_string . '"';

            $phpcsFile->addError($error_message, $stackPtr, 'UseOfLowercaseOr');

        }

    }//end process()