API page: http://api.drupal.org/api/drupal/modules%21system%21theme.api.php/functi...

The hook is declared as:
hook_preprocess_HOOK(&$variables)
while the call made to this hook includes a second parameter whose value is the hook:
hook_preprocess_HOOK(&$variables, $hook)

Based on a quick peek at theme(), this applies to 6.x and 8.x versions too.

Comments

jhodgdon’s picture

jhodgdon
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I'm actually not sure where this hook is invoked exactly. I remember figuring that out at one time (last time I updated the theme() docs), but I'm not sure now. I don't see a call in theme() directly...

solotandem’s picture

solotandem commented

This is the line:
$processor_function($variables, $hook_clone);

jhodgdon’s picture

jhodgdon
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Version: 7.x-dev » 8.x-dev
Issue tags: +Needs backport to D7

OK. Sounds like we should add that to the documentation on the theme() page that lists all the hooks that get invoked, and to each of the corresponding hook pages as well. Thanks!

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catch’s picture

catch
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Issue summary: View changes
Issue tags: +Bug Smash Initiative

Looks like this is still valid, but I really wonder why we pass the hook to a method that obviously knows what $hook is - seems like it might be cruft from when we had hook_preprocess(), so we should consider not passing in the redundant information instead.

catch’s picture

catch
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Issue tags: +Needs issue summary update

This is invoked in ThemeManager::render() and it's still passing the extra variable that's not documented.

I think we should probably document the actual arguments in Drupal 9, but then deprecate the $hook argument for Drupal 10.

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