[keyword] require_once

TIP: PHP file inclusion workarounds for many Drupal hook functions in one module

TODO: this content is incomplete, unfinished, or under construction.

A typical problem/side-effect of the hook and form validation and submit handler function convention systems of Drupal6/7/8 is that module files can grow in size to cope with many hooks (and/or convention functions).

One way of (sort of) addressing it is illustrated in the Examples Project: form examples, which includes tricks like:

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