Select the Count action hooks and filters check box when you want to discover all the action hooks and filters that are invoked.
When tracing is active then at shutdown a number of trace records are written summarising the action hooks and filters that have been invoked.
Information traced
| wp_actions | shows the contents of global $wp_actions formatted as hook shortcodes |
| bw_action_counts | shows the oik-bwtrace global $bw_action_counts formatted as shortcodes |
| most used | bw_action_counts array sorted by invocation count descending |
| by hook name | bw_action_counts array sorted by hook name ascending |
| unique hooks | Count of the number of unique hooks invoked |
| total hooks | Count of the total number of action/filter hooks invoked |
| bw_action_counts_tree | view of the counts taking into account nested actions and filters |
Hook shortcode parameters
The hook shortcode takes 5 positional parameters:
- Hook name(s)
- Hook type: action or filter
- Number of args passed
- Number of invocations
- Attached hook function count
To find which functions are attached use Trace attached hooks functions.
Example wp_actions
C:\apache\htdocs\wordpress\wp-content\plugins\oik-bwtrace\includes\oik-action-counts.php(205:0) bw_trace_create_hook_links(1) 39 2 2019-12-04T17:50:01+00:00 0.311519 0.011168 cf=shutdown 12898 52 3912 6291456/6291456 256M F=601 hook_links <h3>wp_actions</h3> [hook mu_plugin_loaded action 1 3 0] [hook muplugins_loaded action 0 1 1] [hook registered_taxonomy action 3 26 3] [hook registered_post_type action 2 41 3] [hook plugin_loaded action 1 37 0] [hook load_textdomain action 2 20 0] [hook plugins_loaded action 0 1 17] ... [hook shutdown action 0 1 5]
The wp_actions array may include some actions invoked before action counting was initiated.
See Must-Use and Drop-In logic.
Example bw_action_counts
C:\apache\htdocs\wordpress\wp-content\plugins\oik-bwtrace\includes\oik-action-counts.php(205:0) bw_trace_create_hook_links(2) 40 2 2019-12-04T17:50:01+00:00 0.314809 0.003290 cf=shutdown 12898 52 3912 6291456/6291456 256M F=601 hook_links <h3>bw_action_counts</h3> [hook pre_determine_locale filter 1 19 0] [hook pre_option_WPLANG filter 3 1 0] [hook alloptions filter 1 790 0] [hook option_WPLANG filter 2 1 0] [hook locale filter 1 41 1] [hook determine_locale filter 1 19 0] [hook gettext filter 3 4834 0] ... [hook shutdown action 0 1 5]
Example most used
The most used list only shows the hooks that are implemented. In this example we don’t see gettext. The filter is applied many times but there aren’t any attached filter functions.
C:\apache\htdocs\wordpress\wp-content\plugins\oik-bwtrace\includes\oik-action-counts.php(205:0) bw_trace_create_hook_links(3) 41 2 2019-12-04T17:50:01+00:00 0.315855 0.001046 cf=shutdown 12898 52 3912 6291456/6291456 256M F=601 hook_links <h3>most used</h3> [hook option_siteurl filter 2 111 1] [hook option_home filter 2 75 1] [hook map_meta_cap filter 4 62 3] [hook user_has_cap filter 4 62 7] [hook query filter 1 51 1] [hook get_user_metadata filter 4 48 1] [hook pre_render_block filter 2 47 1] ... [hook shutdown action 0 1 5]
Example by hook name
C:\apache\htdocs\wordpress\wp-content\plugins\oik-bwtrace\includes\oik-action-counts.php(205:0) bw_trace_create_hook_links(4) 42 2 2019-12-04T17:50:01+00:00 0.316775 0.000920 cf=shutdown 12898 52 3912 6291456/6291456 256M F=601 hook_links <h3>by hook name</h3> [hook _get_page_link filter 2 10 0] [hook add_admin_bar_menus action 0 1 0] [hook add_extra_wpseo_meta_fields filter 1 1 0] [hook admin_bar_init action 0 1 0] [hook admin_bar_menu action 1 1 18] [hook admin_url filter 3 66 0] [hook after_setup_theme action 0 1 4] [hook alloptions filter 1 790 0] ... [hook yoast_seo_development_mode filter 1 1 0]
Example count hooks
C:\apache\htdocs\wordpress\wp-content\plugins\oik-bwtrace\includes\oik-action-counts.php(162:0) bw_trace_count_report(1) 43 2 2019-12-04T17:50:01+00:00 0.317042 0.000267 cf=shutdown 12898 52 3912 6291456/6291456 256M F=601 count hooks 753
Example total hooks
C:\apache\htdocs\wordpress\wp-content\plugins\oik-bwtrace\includes\oik-action-counts.php(163:0) bw_trace_count_report(2) 44 2 2019-12-04T17:50:01+00:00 0.317178 0.000136 cf=shutdown 12898 52 3912 6291456/6291456 256M F=601 total hooks 12895
Example bw_action_counts_tree
C:\apache\htdocs\wordpress\wp-content\plugins\oik-bwtrace\includes\oik-action-counts.php(205:0) bw_trace_create_hook_links(5) 45 2 2019-12-04T17:50:01+00:00 0.318589 0.001411 cf=shutdown 12898 52 3912 6291456/6291456 256M F=601 hook_links <h3>bw_action_counts_tree</h3> [hook pre_determine_locale filter 1 5 0] [hook pre_option_WPLANG filter 3 1 0] [hook alloptions filter 1 248 0] ... [hook plugins_loaded action 0 1 17] [hook plugins_loaded;load_default_widgets filter 1 1 0] ... [hook wp_footer;wp_after_admin_bar_render action 0 1 0] [hook shutdown action 0 1 5]
