Replace deprecated create_function

[UTCGilligan]

"This function internally performs an eval() and as such has the same security issues as eval(). Additionally it has bad performance and memory usage characteristics.

A native anonymous function should be used instead."

• https://www.php.net/manual/en/function.create-function.php#:~:text=This%20function%20has%20been%20DEPRECATED,this%20function%20is%20highly%20discouraged.

[UTCGilligan]

These changes fix some PHP 8.1 deprecations and errors.