WordPress/wp-includes/widgets/class-wp-widget-custom-html.php

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<?php
/**
* Widget API: WP_Widget_Custom_HTML class
*
* @package WordPress
* @subpackage Widgets
* @since 4.8.1
*/
/**
* Core class used to implement a Custom HTML widget.
*
* @since 4.8.1
*
* @see WP_Widget
*/
class WP_Widget_Custom_HTML extends WP_Widget {
/**
* Default instance.
*
* @since 4.8.1
* @var array
*/
protected $default_instance = array(
'title' => '',
'content' => '',
);
/**
* Sets up a new Custom HTML widget instance.
*
* @since 4.8.1
*/
public function __construct() {
$widget_ops = array(
'classname' => 'widget_custom_html',
'description' => __( 'Arbitrary HTML code.' ),
'customize_selective_refresh' => true,
);
$control_ops = array();
parent::__construct( 'custom_html', __( 'Custom HTML' ), $widget_ops, $control_ops );
}
/**
* Outputs the content for the current Custom HTML widget instance.
*
* @since 4.8.1
*
* @param array $args Display arguments including 'before_title', 'after_title',
* 'before_widget', and 'after_widget'.
* @param array $instance Settings for the current Custom HTML widget instance.
*/
public function widget( $args, $instance ) {
$instance = array_merge( $this->default_instance, $instance );
/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
$title = apply_filters( 'widget_title', $instance['title'], $instance, $this->id_base );
$content = $instance['content'];
/**
* Filters the content of the Custom HTML widget.
*
* @since 4.8.1
*
* @param string $content The widget content.
* @param array $instance Array of settings for the current widget.
* @param WP_Widget_Custom_HTML $this Current Custom HTML widget instance.
*/
$content = apply_filters( 'widget_custom_html_content', $content, $instance, $this );
echo $args['before_widget'];
if ( ! empty( $title ) ) {
echo $args['before_title'] . $title . $args['after_title'];
}
echo $content;
echo $args['after_widget'];
}
/**
* Handles updating settings for the current Custom HTML widget instance.
*
* @since 4.8.1
*
* @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 Settings to save or bool false to cancel saving.
*/
public function update( $new_instance, $old_instance ) {
$instance = array_merge( $this->default_instance, $old_instance );
$instance['title'] = sanitize_text_field( $new_instance['title'] );
if ( current_user_can( 'unfiltered_html' ) ) {
$instance['content'] = $new_instance['content'];
} else {
$instance['content'] = wp_kses_post( $new_instance['content'] );
}
return $instance;
}
/**
* Outputs the Custom HTML widget settings form.
*
* @since 4.8.1
*
* @param array $instance Current instance.
* @returns void
*/
public function form( $instance ) {
$instance = wp_parse_args( (array) $instance, $this->default_instance );
?>
<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( $instance['title'] ); ?>"/>
</p>
<p>
<label for="<?php echo $this->get_field_id( 'content' ); ?>"><?php _e( 'Content:' ); ?></label>
<textarea class="widefat code" rows="16" cols="20" id="<?php echo $this->get_field_id( 'content' ); ?>" name="<?php echo $this->get_field_name( 'content' ); ?>"><?php echo esc_textarea( $instance['content'] ); ?></textarea>
</p>
<?php if ( ! current_user_can( 'unfiltered_html' ) ) : ?>
<?php
$probably_unsafe_html = array( 'script', 'iframe', 'form', 'input', 'style' );
$allowed_html = wp_kses_allowed_html( 'post' );
$disallowed_html = array_diff( $probably_unsafe_html, array_keys( $allowed_html ) );
?>
<?php if ( ! empty( $disallowed_html ) ) : ?>
<p>
<?php _e( 'Some HTML tags are not permitted, including:' ); ?>
<code><?php echo join( '</code>, <code>', $disallowed_html ); ?></code>
</p>
<?php endif; ?>
<?php endif; ?>
<?php
}
}