2020-05-01 / 2818阅 / 悠然
Part of the Settings API. Use this to show messages to users about settings validation problems, missing settings or anything else.
Settings errors should be added inside the $sanitize_callback function defined in register_setting() for a given setting to give feedback about the submission.
By default messages will show immediately after the submission that generated the error. Additional calls to settings_errors() can be used to show errors even when the settings page is first accessed.
Slug title of the setting to which this error applies.
Slug-name to identify the error. Used as part of 'id' attribute in HTML output.
The formatted message text to display to the user (will be shown inside styled div and p tags).
Message type, controls HTML class. Possible values include 'error', 'success', 'warning', 'info'.
Default value: 'error'