Is there a limit in PHP to the length of a variable name or function name?

Question

If I wanted to write a really long variable name like:

$this_is_my_variable_that_does_something_in_the_following_function_and_provides_some_information_with_which_the_function_relies_upon_to_do_all_the_work_it_needs = null; 

would that work? same question for function/method names

Answer 1

Generally, such a limit is imposed by the threat of violence from other folks who interact with your code.

Answer 2

From the documentation:

Variable names follow the same rules as other labels in PHP. A valid variable name starts with a letter or underscore, followed by any number of letters, numbers, or underscores

The same is the case for function names, as stated here.