wp-admin/includes/class-custom-background.php:51Constructor - Registers administration header callback.
$admin_header_callbackcallableoptional''$admin_image_div_callbackcallableoptional'' public function __construct( $admin_header_callback = '', $admin_image_div_callback = '' ) { $this->admin_header_callback = $admin_header_callback; $this->admin_image_div_callback = $admin_image_div_callback; add_action( 'admin_menu', array( $this, 'init' ) ); add_action( 'wp_ajax_custom-background-add', array( $this, 'ajax_background_add' ) ); // Unused since 3.5.0. add_action( 'wp_ajax_set-background-image', array( $this, 'wp_set_background_image' ) ); }Introduced in 3.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/class-custom-background.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.