Sergey Biryukov ef28363c7b Plugins: Standardize the terminology used for actions, filters, and callback functions. ...

Use `$hook_name` when referring to a filter or action hook name, and `$callback` when referring to a callback function.

This brings more consistency to parameter names in Plugin API functions.

Includes minor code layout fixes for better readability and reordering some functions in a more logical order.

Props johnbillion, jrf, SergeyBiryukov.
Fixes #50531.
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git-svn-id: http://core.svn.wordpress.org/trunk@50416 1a063a9b-81f0-0310-95a4-ce76da25c4cd

2021-05-04 10:48:03 +00:00

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