WordPress at a glance
function is not described

register_widget_control() WP 2.2.0

Deprecated in 2.8.0. It is no longer supported and can be removed in future releases. Use wp_register_widget_control() instead.

Registers widget control callback for customizing options.

Allows $name to be an array that accepts either three elements to grab the first element and the third for the name or just uses the first element of the array for the name.

Passes to wp_register_widget_control() after the argument list has been compiled.

  • See: wp_register_widget_control()

No Hooks.

Return

Nothing (null).

Usage

register_widget_control( $name, $control_callback, $width, $height );
$name(int/string) (required)
Sidebar ID.
$control_callback(callable) (required)
Widget control callback to display and process form.
$width(int)
Widget width.
Default: ''
$height(int)
Widget height.
Default: ''

Code of register widget control: wp-includes/deprecated.php WP 5.2.2

<?php
function register_widget_control($name, $control_callback, $width = '', $height = '') {
	_deprecated_function( __FUNCTION__, '2.8.0', 'wp_register_widget_control()' );
	// Compat
	if ( is_array($name) ) {
		if ( count($name) == 3 )
			$name = sprintf($name[0], $name[2]);
		else
			$name = $name[0];
	}

	$id = sanitize_title($name);
	$options = array();
	if ( !empty($width) )
		$options['width'] = $width;
	if ( !empty($height) )
		$options['height'] = $height;
	$params = array_slice(func_get_args(), 4);
	$args = array($id, $name, $control_callback, $options);
	if ( !empty($params) )
		$args = array_merge($args, $params);

	call_user_func_array('wp_register_widget_control', $args);
}