PHP 8.0 compatibility

Hi,

We switched our stack to PHP 8.0 and we expected an issue with your plugin on a fresh install.

`TypeError thrown with message “count(): Argument #1 ($value) must be of type Countable|array, bool given”

Stacktrace:
#13 TypeError in /plugins/page-scroll-to-id/malihu-pagescroll2id.php:377

It looks like you define $instances by grabbing an option stored in DB:

$instances=get_option($this->db_prefix.’instances’);

But you didn’t define a default value.

The returned value is false if not defined.

And count($instances) expects $instances to be an iterable/countable now in PHP 8.

Note that the issue goes away as soon as we show the backend login form and only appears on a fresh project auto installed through CLI scripts using composer to install plugins.