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WordPress hook directory
wp_ajax_{$action}

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 wp_ajax_{$action}

This database has information for all major versions from WP 1.2.1 through 4.4.

Version File Line Type
2.1 wp-admin/admin-ajax.php 267 View hook in source action
2.2 wp-admin/admin-ajax.php 292 View hook in source action
2.3 wp-admin/admin-ajax.php 316 View hook in source action
2.5 wp-admin/admin-ajax.php 583 View hook in source action
2.6 wp-admin/admin-ajax.php 637 View hook in source action
2.7 wp-admin/admin-ajax.php 60 View hook in source action
2.7 wp-admin/admin-ajax.php 1040 View hook in source action
2.8 wp-admin/admin-ajax.php 115 View hook in source action
2.8 wp-admin/admin-ajax.php 1346 View hook in source action
2.9 wp-admin/admin-ajax.php 134 View hook in source action
2.9 wp-admin/admin-ajax.php 1428 View hook in source action
3.0 wp-admin/admin-ajax.php 149 View hook in source action
3.0 wp-admin/admin-ajax.php 1531 View hook in source action
3.1 wp-admin/admin-ajax.php 176 View hook in source action
3.1 wp-admin/admin-ajax.php 1471 View hook in source action
3.2 wp-admin/admin-ajax.php 176 View hook in source action
3.2 wp-admin/admin-ajax.php 1551 View hook in source action
3.3 wp-admin/admin-ajax.php 173 View hook in source action
3.3 wp-admin/admin-ajax.php 1587 View hook in source action
3.4 wp-admin/admin-ajax.php 66 View hook in source action
3.5 wp-admin/admin-ajax.php 72 View hook in source action
3.6 wp-admin/admin-ajax.php 72 View hook in source action
3.7 wp-admin/admin-ajax.php 81 View hook in source action
3.8 wp-admin/admin-ajax.php 82 View hook in source action
3.9 wp-admin/admin-ajax.php 82 View hook in source action
4.0 wp-admin/admin-ajax.php 85 View hook in source action
4.1 wp-admin/admin-ajax.php 85 View hook in source action
4.2 wp-admin/admin-ajax.php 86 View hook in source action
4.3 wp-admin/admin-ajax.php 89 View hook in source action
4.4 wp-admin/admin-ajax.php 89 View hook in source action

Related Hooks

We find related hooks using word stems. wp_ajax_{$action} has 2 significant word stem(s): ajax, action. Note that some of the hooks below may not appear in all versions of WP.