is_protected_meta
Filter Hook: Filters whether a meta key is considered protected.
Source: wp-includes/meta.php:1297
sanitize_meta()
Function: Sanitizes meta value.
Source: wp-includes/meta.php:1313
sanitize_{$object_type}_meta_{$meta_key}_for_{$object_subtype}
Filter Hook: Filters the sanitization of a specific meta key of a specific meta type and subtype.
Source: wp-includes/meta.php:1331
sanitize_{$object_type}_meta_{$meta_key}
Filter Hook: Filters the sanitization of a specific meta key of a specific meta type.
Source: wp-includes/meta.php:1348
register_meta()
Function: Registers a meta key.
Source: wp-includes/meta.php:1399
register_meta_args
Filter Hook: Filters the registration arguments when registering meta.
Source: wp-includes/meta.php:1447
registered_meta_key_exists()
Function: Checks if a meta key is registered.
Source: wp-includes/meta.php:1590
update_metadata_by_mid()
Function: Updates metadata by meta ID.
Source: wp-includes/meta.php:860
delete_metadata_by_mid()
Function: Deletes metadata by meta ID.
Source: wp-includes/meta.php:982
delete_{$meta_type}meta
Action Hook: Fires immediately before deleting post or comment metadata of a specific type.
Source: wp-includes/meta.php:1055