You can change file “\htdocs\wp-content\plugins\php-code-widget\execphp.php” as follows (line 62) :
/* create_function deprecated since php 7.2 */
/* add_action(‘widgets_init’, create_function(”, ‘return register_widget(“PHP_Code_Widget”);’)); */
add_action(‘widgets_init’, function() { return register_widget(“PHP_Code_Widget”);} );
