Fix PHP 8.4 deprecation: Implicitly marking parameter as nullable is deprecated, the explicit nullable type must be used instead

PHP 8.4 will be released in November 2024, but the list of new features and deprecated features is...

https://dev.to/gromnan/fix-php-84-deprecation-implicitly-marking-parameter-as-nullable-is-deprecated-the-explicit-nullable-type-must-be-used-instead-5gp3

Why PHP Usage Has Declined by 40% in Just Over 2 Years

PHP popularity has dropped dramatically, coinciding with WordPress becoming "JavaScript-first" according to its co-creator Matt Mullenweg.

https://thenewstack.io/why-php-usage-has-declined-by-40-in-just-over-2-years/