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Deprecated plugin hooks in WordPress 4.4

Important! Some WordPress hooks get applied in multiple PHP files. If you are trying to figure out what a specific WordPress hook does, sort the table by "hook" and make sure you are looking in all the files where it occurs.

Hook Type Renamed?
1 twentythirteen_credits action DEPRECATED
2 {$prefix}plugin_action_links note filter DEPRECATED
3 {$prefix}plugin_action_links_{$plugin_file} note filter DEPRECATED
4 twentythirteen_author_bio_avatar_size filter DEPRECATED
5 twentythirteen_attachment_size filter DEPRECATED
6 customize_value_{$this->id_data[base]} note filter DEPRECATED

Important warning about variable hooks

Some hooks have variables in their names. For example, pre_${taxonomy}_$field and admin_head- both have variable names. In general, any hook that ends (or begins) with - or _, or contains a $, has a variable name. Since the syntax with which these variables are defined may change from version to version, this page may think that a hook is deprecated (or new) even if it is not. You can usually catch this sort of thing by comparing this hook to the list of "related hooks" below.