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WP_Widget::_register()

Register all widget instances of this widget class.

Source

File: wp-includes/class-wp-widget.php 

public function _register() {
		$settings = $this->get_settings();
		$empty    = true;

		// When $settings is an array-like object, get an intrinsic array for use with array_keys().
		if ( $settings instanceof ArrayObject || $settings instanceof ArrayIterator ) {
			$settings = $settings->getArrayCopy();
		}

		if ( is_array( $settings ) ) {
			foreach ( array_keys( $settings ) as $number ) {
				if ( is_numeric( $number ) ) {
					$this->_set( $number );
					$this->_register_one( $number );
					$empty = false;
				}
			}
		}

		if ( $empty ) {
			// If there are none, we register the widget's existence with a generic template.
			$this->_set( 1 );
			$this->_register_one();
		}
	}

Uses

Uses Description
wp-includes/class-wp-widget.php: WP_Widget::get_settings()

Retrieves the settings for all instances of the widget class.
wp-includes/class-wp-widget.php: WP_Widget::_register_one()

Registers an instance of the widget class.
wp-includes/class-wp-widget.php: WP_Widget::_set()

Sets the internal order number for the widget instance.

Changelog

Version Description
2.8.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/classes/wp_widget/_register