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wp-includes/widgets/class-wp-widget-search.php

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+<?php
+/**
+ * Widget API: WP_Widget_Search class
+ *
+ * @package WordPress
+ * @subpackage Widgets
+ * @since 4.4.0
+ */
+
+/**
+ * Core class used to implement a Search widget.
+ *
+ * @since 2.8.0
+ *
+ * @see WP_Widget
+ */
+class WP_Widget_Search extends WP_Widget {
+
+	/**
+	 * Sets up a new Search widget instance.
+	 *
+	 * @since 2.8.0
+	 */
+	public function __construct() {
+		$widget_ops = array(
+			'classname'                   => 'widget_search',
+			'description'                 => __( 'A search form for your site.' ),
+			'customize_selective_refresh' => true,
+			'show_instance_in_rest'       => true,
+		);
+		parent::__construct( 'search', _x( 'Search', 'Search widget' ), $widget_ops );
+	}
+
+	/**
+	 * Outputs the content for the current Search widget instance.
+	 *
+	 * @since 2.8.0
+	 *
+	 * @param array $args     Display arguments including 'before_title', 'after_title',
+	 *                        'before_widget', and 'after_widget'.
+	 * @param array $instance Settings for the current Search widget instance.
+	 */
+	public function widget( $args, $instance ) {
+		$title = ! empty( $instance['title'] ) ? $instance['title'] : '';
+
+		/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
+		$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
+
+		echo $args['before_widget'];
+		if ( $title ) {
+			echo $args['before_title'] . $title . $args['after_title'];
+		}
+
+		// Use active theme search form if it exists.
+		get_search_form();
+
+		echo $args['after_widget'];
+	}
+
+	/**
+	 * Outputs the settings form for the Search widget.
+	 *
+	 * @since 2.8.0
+	 *
+	 * @param array $instance Current settings.
+	 */
+	public function form( $instance ) {
+		$instance = wp_parse_args( (array) $instance, array( 'title' => '' ) );
+		$title    = $instance['title'];
+		?>
+		<p>
+			<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:' ); ?></label>
+			<input class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo esc_attr( $title ); ?>" />
+		</p>
+		<?php
+	}
+
+	/**
+	 * Handles updating settings for the current Search widget instance.
+	 *
+	 * @since 2.8.0
+	 *
+	 * @param array $new_instance New settings for this instance as input by the user via
+	 *                            WP_Widget::form().
+	 * @param array $old_instance Old settings for this instance.
+	 * @return array Updated settings.
+	 */
+	public function update( $new_instance, $old_instance ) {
+		$instance          = $old_instance;
+		$new_instance      = wp_parse_args( (array) $new_instance, array( 'title' => '' ) );
+		$instance['title'] = sanitize_text_field( $new_instance['title'] );
+		return $instance;
+	}
+}