“field_” is how ACF determines that it’s a field key and that prefix is required. Anything else and ACF considers it a field name. Some functions will fail or through errors you use something else. You can put practically anything after the _.
Welcome to the Advanced Custom Fields community forum.
Browse through ideas, snippets of code, questions and answers between fellow ACF users
Clients need flexibility. Developers need a repeatable workflow that doesn’t have a steep learning curve. See how digital marketing agency Noiza found both with Advanced Custom Fields in our latest case study.https://t.co/BxQAy6COJt