'Billing period must be formatted as "Month", "Date", "Year" or "Week."', 'invalid_date_format' => 'Dates must be provided in MMYYYY format.', 'invalid_amount_format' => 'Money amounts must be formatted in decimal format, rounded to the hundredths place, ie 30.00', 'missing_ip_address' => 'IP address is required but was not provided in the request', 'missing_cc_type' => 'Credit Card Type is required but was not provided in the request', 'missing_cc_number' => 'Credit Card Number is required but was not provided in the request', 'missing_cc_details' => 'Full Credit Card details must be provided.', 'missing_cc_exp' => 'Credit Card Expiration is required but was not provided in the request', 'missing_cc_code' => 'Credit Card code is required but was not provided in the request', 'missing_email' => 'Email is required but was not provided in the request', 'missing_street' => 'Street is required but was not provided in the request', 'missing_city' => 'City is required but was not provided in the request', 'missing_state' => 'State is required but was not provided in the request', 'missing_country' => 'Country is required but was not provided in the request', 'missing_postal_code' => 'Postal code is required but was not provided in the request', 'missing_amt' => 'Amount is required but was not provided in the request', 'missing_identifier' => 'An identifier (such as a previous transaction ID) is required but was not provided in the request', 'missing_action' => 'An action to be taken by the payment gateway is required but was not provided in the request', 'missing_refund_type' => 'The type of refund you are issuing is required but was not provided in the request', 'missing_start_date' => 'Start date is required but was not provided in the request', 'missing_profile_start_date'=> 'Profile start date is required but was not provided in the request', 'missing_billing_period' => 'Billing period is required but was not provided in the request', 'missing_billing_frequency' => 'Billing frequency is required but was not provided in the request', 'missing_desc' => 'Description (desc) is required but was not provided in the request', 'missing_first_name' => 'First name is required but was not provided in the request', 'missing_last_name' => 'Last name is required but was not provided in the request', 'missing_currency_code' => 'Currency is required but was not provided in the request', 'no_details' => 'No further details provided', 'is_not_a_param' => 'Is not a valid parameter for this method', ); return $lang;