WordPress at a glance
function is not described

WP_Customize_Manager::add_control() public WP 3.4.0

Add a customize control.

{} It's a method of the class: WP_Customize_Manager{}

No Hooks.

Return

WP_Customize_Control. The instance of the control that was added.

Usage

$WP_Customize_Manager = new WP_Customize_Manager();
$WP_Customize_Manager->add_control( $id, $args );
$id(WP_Customize_Control|string) (required)
Customize Control object, or ID.
$args(array)
Array of properties for the new Control object. See WP_Customize_Control::__construct() for information on accepted arguments.
Default: empty array

Notes

Changelog

Since 3.4.0 Introduced.
Since 4.5.0 Return added WP_Customize_Control instance.

Code of WP_Customize_Manager::add_control() WP 5.7.2

<?php
public function add_control( $id, $args = array() ) {
	if ( $id instanceof WP_Customize_Control ) {
		$control = $id;
	} else {
		$control = new WP_Customize_Control( $this, $id, $args );
	}

	$this->controls[ $control->id ] = $control;
	return $control;
}