对于想拦截某些页面请求或判断页面执行的Hook、了解 WordPress 的执行过程，你可以通过下列代码得到。
// 输出当前页面执行的hook和顺序
add_action( 'shutdown', function(){
print_r( $GLOBALS['wp_actions'] );
});
你会得到类似这样的内容
muplugins_loaded registered_taxonomy registered_taxonomy registered_taxonomy registered_taxonomy registered_taxonomy registered_post_type registered_post_type registered_post_type registered_post_type registered_post_type plugins_loaded sanitize_comment_cookies setup_theme unload_textdomain load_textdomain after_setup_theme load_textdomain load_textdomain auth_cookie_malformed auth_cookie_valid set_current_user init registered_post_type registered_post_type registered_post_type registered_post_type registered_post_type registered_taxonomy registered_taxonomy registered_taxonomy registered_taxonomy registered_taxonomy widgets_init register_sidebar register_sidebar register_sidebar wp_register_sidebar_widget wp_register_sidebar_widget wp_register_sidebar_widget wp_register_sidebar_widget wp_register_sidebar_widget wp_register_sidebar_widget wp_register_sidebar_widget wp_register_sidebar_widget wp_register_sidebar_widget wp_register_sidebar_widget wp_register_sidebar_widget wp_register_sidebar_widget wp_loaded parse_tax_query parse_tax_query posts_selection template_redirect admin_bar_init add_admin_bar_menus get_header wp_head wp_enqueue_scripts wp_print_styles wp_print_scripts get_template_part_content begin_fetch_post_thumbnail_html end_fetch_post_thumbnail_html get_template_part_content get_template_part_content get_template_part_content get_template_part_content get_template_part_content get_template_part_content get_template_part_content get_template_part_content get_template_part_content begin_fetch_post_thumbnail_html end_fetch_post_thumbnail_html get_sidebar dynamic_sidebar_before dynamic_sidebar dynamic_sidebar_after get_footer twentytwelve_credits wp_footer wp_print_footer_scripts wp_before_admin_bar_render wp_after_admin_bar_render shutdown
优化一下显示方式，以便更快的查看执行次数
add_action( 'shutdown', function(){
foreach( $GLOBALS['wp_actions'] as $action => $count )
printf( '%s (%d)
' . PHP_EOL, $action, $count );
});
muplugins_loaded (1) registered_taxonomy (10) registered_post_type (10) plugins_loaded (1) sanitize_comment_cookies (1) setup_theme (1) unload_textdomain (1) load_textdomain (3) after_setup_theme (1) auth_cookie_malformed (1) auth_cookie_valid (1) set_current_user (1) init (1) widgets_init (1) register_sidebar (3) wp_register_sidebar_widget (12) wp_loaded (1) parse_request (1) send_headers (1) parse_tax_query (2) parse_query (1) pre_get_posts (1) posts_selection (1) wp (1) template_redirect (1) wp_default_scripts (1) wp_default_styles (1) admin_bar_init (1) add_admin_bar_menus (1) get_header (1) wp_head (1) wp_enqueue_scripts (1) wp_print_styles (1) wp_print_scripts (1) loop_start (1) the_post (10) get_template_part_content (10) begin_fetch_post_thumbnail_html (2) end_fetch_post_thumbnail_html (2) loop_end (1) get_sidebar (1) dynamic_sidebar_before (1) dynamic_sidebar (1) dynamic_sidebar_after (1) get_footer (1) twentytwelve_credits (1) wp_footer (1) wp_print_footer_scripts (1) admin_bar_menu (1) wp_before_admin_bar_render (1) wp_after_admin_bar_render (1) shutdown (1)