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WordPress hook directory
postbox_classes_{$page}_{$id}

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.

WordPress version history for postbox_classes_{$page}_{$id}

This database has information for all major versions from WP 1.2.1 through 6.2.

Version File Line Type
3.2 wp-admin/includes/post.php 1080 View in context filter
3.3 wp-admin/includes/post.php 1002 View in context filter
3.4 wp-admin/includes/post.php 998 View in context filter
3.5 wp-admin/includes/post.php 969 View in context filter
3.6 wp-admin/includes/post.php 984 View in context filter
3.7 wp-admin/includes/post.php 1000 View in context filter
3.8 wp-admin/includes/post.php 1000 View in context filter
3.9 wp-admin/includes/post.php 1098 View in context filter
4.0 wp-admin/includes/post.php 1105 View in context filter
4.1 wp-admin/includes/post.php 1114 View in context filter
4.2 wp-admin/includes/post.php 1176 View in context filter
4.3 wp-admin/includes/post.php 1190 View in context filter
4.4 wp-admin/includes/post.php 1193 View in context filter
4.5 wp-admin/includes/post.php 1193 View in context filter
4.6 wp-admin/includes/post.php 1200 View in context filter
4.7 wp-admin/includes/post.php 1236 View in context filter
4.8 wp-admin/includes/post.php 1207 View in context filter
4.9 wp-admin/includes/post.php 1208 View in context filter
5.0 wp-admin/includes/post.php 1212 View in context filter
5.1 wp-admin/includes/post.php 1313 View in context filter

Important warning!

This hook does not occur in the most recent version of WordPress (6.2). Do not use it. It is deprecated. You should look at the list of "related hooks" below to see if you can figure out what replaced it.

Related Hooks

We find related hooks using word stems. postbox_classes_{$page}_{$id} has 4 significant word stem(s): postbox, classes, page, id. Note that some of the hooks below may not appear in all versions of WP.