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learndash_billing_cycle_field_frequency_validate

learndash_billing_cycle_field_frequency_validate( string $price_billing_t3 = '' )

Validate the billing cycle field frequency.


Description #


Parameters #

$price_billing_t3

(string) (Optional) Billing frequency code. D, W, M, or Y.

Default value: ''


Return #

(string) Valid frequency or empty string.


Source #

File: includes/settings/settings-billing-functions.php


Changelog #

Changelog
Version Description
3.5.0 Introduced.