add_custom_background( callable $wp_head_callback = ”, callable $admin_head_callback = ”, callable $admin_preview_callback = ” )

为背景图像显示添加回调。
Add callbacks for background image display.

目录锚点：#说明#参数#返回#源码

说明（Description）

另见函数 add_theme_support()

参数（Parameters）

返回（Return）

无返回值

源码（Source）

/**
 * Add callbacks for background image display.
 *
 * @since 3.0.0
 * @deprecated 3.4.0
 * @deprecated Use add_theme_support('custom-background, $args)
 * @see add_theme_support()
 *
 * @param callback $wp_head_callback Call on 'wp_head' action.
 * @param callback $admin_head_callback Call on custom background administration screen.
 * @param callback $admin_preview_callback Output a custom background image div on the custom background administration screen. Optional.
 */
function add_custom_background( $wp_head_callback = '', $admin_head_callback = '', $admin_preview_callback = '' ) {
	_deprecated_function( __FUNCTION__, '3.4', 'add_theme_support( 'custom-background', $args )' );
	$args = array();
	if ( $wp_head_callback )
		$args['wp-head-callback'] = $wp_head_callback;
	if ( $admin_head_callback )
		$args['admin-head-callback'] = $admin_head_callback;
	if ( $admin_preview_callback )
		$args['admin-preview-callback'] = $admin_preview_callback;
	return add_theme_support( 'custom-background', $args );
}