WP_Widget::_set() – Method | Developer.WordPress.org

WP_Widget::_set( int $number )

Sets the internal order number for the widget instance.

Parameters

$numberintrequired: The unique order number of this widget instance compared to other instances of the same class.

public function _set( $number ) {
	$this->number = $number;
	$this->id     = $this->id_base . '-' . $number;
}

Used by	Description
WP_Widget::display_callback()`wp-includes/class-wp-widget.php`	Generates the actual widget content (Do NOT override).
WP_Widget::update_callback()`wp-includes/class-wp-widget.php`	Handles changed settings (Do NOT override).
WP_Widget::form_callback()`wp-includes/class-wp-widget.php`	Generates the widget control form (Do NOT override).
WP_Widget::_register()`wp-includes/class-wp-widget.php`	Register all widget instances of this widget class.

Version	Description
2.8.0	Introduced.

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