backend_page_edit
Allows adding of custom content to the top info page editing toolbar.
Helpdesk
Input (passed by reference)
$params array Associative array of the page being edited, from the database table helpdesk_page.
… your plugin code …
Output
{$backend_page_edit.%plugin_id%.action_button_li}
HTML code of a custom <li> element in the page editing toolbar.
Helpdesk
Plugin code example
PHP
public function backendPageEdit($params) { return [ 'action_button_li' => '<li><span class="gray"><i class="icon16 info"></i>' . _wp('Extra info') . '</span></li>', ]; }