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O

$returned_one – filter

comments_open – filter

default_option_doesnotexist – filter

default_option_doesnotexist – filter

default_site_option_$key – filter

default_site_option_doesnotexist – filter

delete_option – action

get_blogs_of_user – filter

get_object_subtype_customtype – filter

image_editor_output_format – filter

image_editor_output_format – filter

oembed_iframe_title_attribute – filter

oembed_response_data – filter

oembed_result – filter

oembed_ttl – filter

old_slug_redirect_url – filter

option_$option – filter

option_$timeout – filter

option_$transient_timeout – filter

option_show_comments_cookies_opt_in – filter

override_load_textdomain – filter

personal_options_update – action

populate_options – action

posts_search_orderby – filter

pre_oembed_result – filter

pre_option_blog_charset – filter

pre_option_enable_xmlrpc – filter

pre_option_show_on_front – filter

pre_site_option_site_meta_supported – filter

pre_update_option_cron – filter

sanitize_option_test_option – filter

sanitize_option_WPLANG – filter

sanitize_option_WPLANG – filter

wp_get_object_terms – filter

wp_get_object_terms_args – filter

wp_nav_menu_objects – filter

wp_sitemaps_posts_show_on_front_entry – filter