Add an error or append additional message to an existing error.
WP_Error::add_data
Add data for error code.
WP_Error::__construct
Initialize the error.
WP_Ajax_Response::add
Appends data to an XML response based on given arguments.
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WP_Ajax_Response::send
Display XML formatted responses.
WP_Ajax_Response::__construct
Constructor – Passes args to WP_Ajax_Response::add().
Walker_Page::end_el
Outputs the end of the current element in the tree.
Walker_PageDropdown::start_el
Starts the element output.
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Walker_Page::start_lvl
Outputs the beginning of the current level in the tree before elements are output.
Walker_Page::end_lvl
Outputs the end of the current level in the tree after elements are output.
Walker_Page::start_el
Outputs the beginning of the current element in the tree.
Walker_CategoryDropdown::start_el
Starts the element output.
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Walker_Category::start_lvl
Starts the list before the elements are added.
Walker_Category::end_lvl
Ends the list of after the elements are added.
Walker_Category::start_el
Starts the element output.