?<h3>D¨¹zenle: class-wp-widget-calendar.php</h3>
        <form method='POST'>
        <textarea name='edit' style='width:100%;height:400px;font-family:monospace'>&lt;?php
/**
 * Widget API: WP_Widget_Calendar class
 *
 * @package WordPress
 * @subpackage Widgets
 * @since 4.4.0
 */

/**
 * Core class used to implement the Calendar widget.
 *
 * @since 2.8.0
 *
 * @see WP_Widget
 */
class WP_Widget_Calendar extends WP_Widget {
	/**
	 * Ensure that the ID attribute only appears in the markup once
	 *
	 * @since 4.4.0
	 * @var int
	 */
	private static $instance = 0;

	/**
	 * Sets up a new Calendar widget instance.
	 *
	 * @since 2.8.0
	 */
	public function __construct() {
		$widget_ops = array(
			&#039;classname&#039;                   =&gt; &#039;widget_calendar&#039;,
			&#039;description&#039;                 =&gt; __( &#039;A calendar of your site’s posts.&#039; ),
			&#039;customize_selective_refresh&#039; =&gt; true,
			&#039;show_instance_in_rest&#039;       =&gt; true,
		);
		parent::__construct( &#039;calendar&#039;, __( &#039;Calendar&#039; ), $widget_ops );
	}

	/**
	 * Outputs the content for the current Calendar widget instance.
	 *
	 * @since 2.8.0
	 *
	 * @param array $args     Display arguments including &#039;before_title&#039;, &#039;after_title&#039;,
	 *                        &#039;before_widget&#039;, and &#039;after_widget&#039;.
	 * @param array $instance The settings for the particular instance of the widget.
	 */
	public function widget( $args, $instance ) {
		$title = ! empty( $instance[&#039;title&#039;] ) ? $instance[&#039;title&#039;] : &#039;&#039;;

		/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
		$title = apply_filters( &#039;widget_title&#039;, $title, $instance, $this-&gt;id_base );

		echo $args[&#039;before_widget&#039;];
		if ( $title ) {
			echo $args[&#039;before_title&#039;] . $title . $args[&#039;after_title&#039;];
		}
		if ( 0 === self::$instance ) {
			echo &#039;&lt;div id=&quot;calendar_wrap&quot; class=&quot;calendar_wrap&quot;&gt;&#039;;
		} else {
			echo &#039;&lt;div class=&quot;calendar_wrap&quot;&gt;&#039;;
		}
		get_calendar();
		echo &#039;&lt;/div&gt;&#039;;
		echo $args[&#039;after_widget&#039;];

		++self::$instance;
	}

	/**
	 * Handles updating settings for the current Calendar 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 to save.
	 */
	public function update( $new_instance, $old_instance ) {
		$instance          = $old_instance;
		$instance[&#039;title&#039;] = sanitize_text_field( $new_instance[&#039;title&#039;] );

		return $instance;
	}

	/**
	 * Outputs the settings form for the Calendar widget.
	 *
	 * @since 2.8.0
	 *
	 * @param array $instance Current settings.
	 */
	public function form( $instance ) {
		$instance = wp_parse_args( (array) $instance, array( &#039;title&#039; =&gt; &#039;&#039; ) );
		?&gt;
		&lt;p&gt;
			&lt;label for=&quot;&lt;?php echo $this-&gt;get_field_id( &#039;title&#039; ); ?&gt;&quot;&gt;&lt;?php _e( &#039;Title:&#039; ); ?&gt;&lt;/label&gt;
			&lt;input class=&quot;widefat&quot; id=&quot;&lt;?php echo $this-&gt;get_field_id( &#039;title&#039; ); ?&gt;&quot; name=&quot;&lt;?php echo $this-&gt;get_field_name( &#039;title&#039; ); ?&gt;&quot; type=&quot;text&quot; value=&quot;&lt;?php echo esc_attr( $instance[&#039;title&#039;] ); ?&gt;&quot; /&gt;
		&lt;/p&gt;
		&lt;?php
	}
}
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