wp-includes/widgets/class-wp-widget-custom-html.php:249Outputs the Custom HTML widget settings form.
$instancearray public function form( $instance ) { $instance = wp_parse_args( (array) $instance, $this->default_instance ); ?> <input id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" class="title sync-input" type="hidden" value="<?php echo esc_attr( $instance['title'] ); ?>" /> <textarea id="<?php echo $this->get_field_id( 'content' ); ?>" name="<?php echo $this->get_field_name( 'content' ); ?>" class="content sync-input" hidden><?php echo esc_textarea( $instance['content'] ); ?></textarea> <?php }Introduced in 4.8.1. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/widgets/class-wp-widget-custom-html.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.