PHP Notice: Trying to access array offset on value of type bool …

When editing a post (with WP Statistics for this post visible) somehow a lot of PHP Notice are triggered in error log:

[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 255
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 262
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 266
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 270
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 274
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 278
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 282
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 286
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 290
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 294
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 298
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 302
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 306
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 309
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 318
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 318
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 318
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 318
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 318
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 324
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 329
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 333
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 337
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 341
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 345
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 349
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 353
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 357
[17-Dec-2021 21:45:33 UTC] PHP Notice:  Trying to access array offset on value of type bool in /xx/wp-content/plugins/wp-statistics/includes/class-wp-statistics-widget.php on line 361

Problem seems to be in file wp-statistics/includes/class-wp-statistics-widget.php which actually seems to create a Statistics widget to “Show site stats in sidebar.”

Sidenote: We have no Statistics widget in any Design > Widgets > Widget Area present.

Not sure why the “Outputs the options form on admin” code, which triggers the notices, is even called when editing a post.

Obviously class-wp-statistics-widget.php line 251 does not return valid options:

$widget_options = WP_STATISTICS\Option::get('widget');

So line 255 and below fail because there is no array:

echo esc_attr($widget_options['name_widget']);

Suggested fix:

Add a check after line 255 similar to the check in line 31 in same file:

if (!is_array($widget_options)) {
    return;
}

or better find the reason why this code is called on post edit screen where it is not used.

Thanks for the plugin.

WordPress 5.8.2, WP Statistics 13.1.2