Filters a specific option before its value is (maybe) serialized and updated.
option_{$option}
Filters the value of an existing option.
default_option_{$option}
This filter is documented in wp-includes/option.php
pre_option_{$option}
Filters the value of an existing option before it is retrieved.
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wp_add_nav_menu_item
Fires immediately after a new navigation menu item has been added.
ms_not_installed
Displays a failure message.
ms_network_not_found
This action is documented in wp-includes/ms-settings.php
subdirectory_reserved_names
Filters reserved site names on a sub-directory Multisite installation.
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get_subdirectory_reserved_names
Retrieves a list of reserved site on a sub-directory Multisite installation.
after_signup_user
Fires after a user’s signup information has been written to the database.
after_signup_site
Fires after site signup information has been written to the database.
wp_image_add_srcset_and_sizes
Adds ‘srcset’ and ‘sizes’ attributes to an existing ‘img’ element.
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wp_calculate_image_sizes
Filters the output of ‘wp_calculate_image_sizes()’.
wp_make_content_images_responsive
Filters ‘img’ elements in post content to add ‘srcset’ and ‘sizes’ attributes.
wp_calculate_image_sizes
Creates a ‘sizes’ attribute value for an image.