wp_widget_control

wp_widget_control – 这个函数用来在WordPress小工具管理界面显示小工具控制表单。它负责渲染允许用户配置小工具设置的HTML表单: 当用户在小工具管理界面点击小工具的”编辑”链接时，该函数被触发。

Meta widget用于显示一个widget的控制表单。

从 dynamic_sidebar() 调用。

function wp_widget_control( $sidebar_args ) {
	global $wp_registered_widgets, $wp_registered_widget_controls, $sidebars_widgets;

	$widget_id  = $sidebar_args['widget_id'];
	$sidebar_id = isset( $sidebar_args['id'] ) ? $sidebar_args['id'] : false;
	$key        = $sidebar_id ? array_search( $widget_id, $sidebars_widgets[ $sidebar_id ], true ) : '-1'; // Position of widget in sidebar.
	$control    = isset( $wp_registered_widget_controls[ $widget_id ] ) ? $wp_registered_widget_controls[ $widget_id ] : array();
	$widget     = $wp_registered_widgets[ $widget_id ];

	$id_format     = $widget['id'];
	$widget_number = isset( $control['params'][0]['number'] ) ? $control['params'][0]['number'] : '';
	$id_base       = isset( $control['id_base'] ) ? $control['id_base'] : $widget_id;
	$width         = isset( $control['width'] ) ? $control['width'] : '';
	$height        = isset( $control['height'] ) ? $control['height'] : '';
	$multi_number  = isset( $sidebar_args['_multi_num'] ) ? $sidebar_args['_multi_num'] : '';
	$add_new       = isset( $sidebar_args['_add'] ) ? $sidebar_args['_add'] : '';

	$before_form           = isset( $sidebar_args['before_form'] ) ? $sidebar_args['before_form'] : '<form method="post">';
	$after_form            = isset( $sidebar_args['after_form'] ) ? $sidebar_args['after_form'] : '</form>';
	$before_widget_content = isset( $sidebar_args['before_widget_content'] ) ? $sidebar_args['before_widget_content'] : '<div class="widget-content">';
	$after_widget_content  = isset( $sidebar_args['after_widget_content'] ) ? $sidebar_args['after_widget_content'] : '</div>';

	$query_arg = array( 'editwidget' => $widget['id'] );
	if ( $add_new ) {
		$query_arg['addnew'] = 1;
		if ( $multi_number ) {
			$query_arg['num']  = $multi_number;
			$query_arg['base'] = $id_base;
		}
	} else {
		$query_arg['sidebar'] = $sidebar_id;
		$query_arg['key']     = $key;
	}

	/*
	 * We aren't showing a widget control, we're outputting a template
	 * for a multi-widget control.
	 */
	if ( isset( $sidebar_args['_display'] ) && 'template' === $sidebar_args['_display'] && $widget_number ) {
		// number == -1 implies a template where id numbers are replaced by a generic '__i__'.
		$control['params'][0]['number'] = -1;
		// With id_base widget ID's are constructed like {$id_base}-{$id_number}.
		if ( isset( $control['id_base'] ) ) {
			$id_format = $control['id_base'] . '-__i__';
		}
	}

	$wp_registered_widgets[ $widget_id ]['callback'] = $wp_registered_widgets[ $widget_id ]['_callback'];
	unset( $wp_registered_widgets[ $widget_id ]['_callback'] );

	$widget_title = esc_html( strip_tags( $sidebar_args['widget_name'] ) );
	$has_form     = 'noform';

	echo $sidebar_args['before_widget'];
	?>
	<div class="widget-top">
	<div class="widget-title-action">
		<button type="button" class="widget-action hide-if-no-js" aria-expanded="false">
			<span class="screen-reader-text edit">
				<?php
				/* translators: %s: Widget title. */
				printf( __( 'Edit widget: %s' ), $widget_title );
				?>
			</span>
			<span class="screen-reader-text add">
				<?php
				/* translators: %s: Widget title. */
				printf( __( 'Add widget: %s' ), $widget_title );
				?>
			</span>
			<span class="toggle-indicator" aria-hidden="true"></span>
		</button>
		<a class="widget-control-edit hide-if-js" href="<?php echo esc_url( add_query_arg( $query_arg ) ); ?>">
			<span class="edit"><?php _ex( 'Edit', 'widget' ); ?></span>
			<span class="add"><?php _ex( 'Add', 'widget' ); ?></span>
			<span class="screen-reader-text"><?php echo $widget_title; ?></span>
		</a>
	</div>
	<div class="widget-title"><h3><?php echo $widget_title; ?><span class="in-widget-title"></span></h3></div>
	</div>

	<div class="widget-inside">
	<?php echo $before_form; ?>
	<?php echo $before_widget_content; ?>
	<?php
	if ( isset( $control['callback'] ) ) {
		$has_form = call_user_func_array( $control['callback'], $control['params'] );
	} else {
		echo "tt<p>" . __( 'There are no options for this widget.' ) . "</p>n";
	}

	$noform_class = '';
	if ( 'noform' === $has_form ) {
		$noform_class = ' widget-control-noform';
	}
	?>
	<?php echo $after_widget_content; ?>
	<input type="hidden" name="widget-id" class="widget-id" value="<?php echo esc_attr( $id_format ); ?>" />
	<input type="hidden" name="id_base" class="id_base" value="<?php echo esc_attr( $id_base ); ?>" />
	<input type="hidden" name="widget-width" class="widget-width" value="<?php echo esc_attr( $width ); ?>" />
	<input type="hidden" name="widget-height" class="widget-height" value="<?php echo esc_attr( $height ); ?>" />
	<input type="hidden" name="widget_number" class="widget_number" value="<?php echo esc_attr( $widget_number ); ?>" />
	<input type="hidden" name="multi_number" class="multi_number" value="<?php echo esc_attr( $multi_number ); ?>" />
	<input type="hidden" name="add_new" class="add_new" value="<?php echo esc_attr( $add_new ); ?>" />

	<div class="widget-control-actions">
		<div class="alignleft">
			<button type="button" class="button-link button-link-delete widget-control-remove"><?php _e( 'Delete' ); ?></button>
			<span class="widget-control-close-wrapper">
				| <button type="button" class="button-link widget-control-close"><?php _e( 'Done' ); ?></button>
			</span>
		</div>
		<div class="alignright<?php echo $noform_class; ?>">
			<?php submit_button( __( 'Save' ), 'primary widget-control-save right', 'savewidget', false, array( 'id' => 'widget-' . esc_attr( $id_format ) . '-savewidget' ) ); ?>
			<span class="spinner"></span>
		</div>
		<br class="clear" />
	</div>
	<?php echo $after_form; ?>
	</div>

	<div class="widget-description">
	<?php
	$widget_description = wp_widget_description( $widget_id );
	echo ( $widget_description ) ? "$widget_descriptionn" : "$widget_titlen";
	?>
	</div>
	<?php
	echo $sidebar_args['after_widget'];

	return $sidebar_args;
}