WordPress hook directory
extra_{$context}_headers

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 extra_{$context}_headers

This database has information for all major versions from WP 1.2.1 through 5.1.

Version File Line Type
2.9 wp-includes/functions.php 3589 View in context filter
3.0 wp-includes/functions.php 4174 View in context filter
3.1 wp-includes/functions.php 4293 View in context filter
3.2 wp-includes/functions.php 4348 View in context filter
3.3 wp-includes/functions.php 4452 View in context filter
3.4 wp-includes/functions.php 3384 View in context filter
3.5 wp-includes/functions.php 3504 View in context filter
3.6 wp-includes/functions.php 3576 View in context filter
3.7 wp-includes/functions.php 3688 View in context filter
3.8 wp-includes/functions.php 3677 View in context filter
3.9 wp-includes/functions.php 3900 View in context filter
4.0 wp-includes/functions.php 4025 View in context filter
4.1 wp-includes/functions.php 4204 View in context filter
4.2 wp-includes/functions.php 4219 View in context filter
4.3 wp-includes/functions.php 4326 View in context filter
4.4 wp-includes/functions.php 4479 View in context filter
4.5 wp-includes/functions.php 4593 View in context filter
4.6 wp-includes/functions.php 4669 View in context filter
4.7 wp-includes/functions.php 4758 View in context filter
4.8 wp-includes/functions.php 4806 View in context filter
4.9 wp-includes/functions.php 4853 View in context filter
5.0 wp-includes/functions.php 4877 View in context filter
5.1 wp-includes/functions.php 5483 View in context filter

Related Hooks

We find related hooks using word stems. extra_{$context}_headers has 3 significant word stem(s): extra, context, headers. Note that some of the hooks below may not appear in all versions of WP.