Adding TypeError and ValueError to count() function

Greetings internals, I would like your input on adding TypeError and ValueError exceptions to the count() function in respect to the Consistent type errors for internal functions RFC [1], the initial PR [2] was denied as null was not accepted as a value when it seems to be prevalent to use count() as a substitute for isset() (this is currently done in the test runner for php-src), although a "type error" warning was already emitted with null. So I've made an adjustment by still accepting null but deprecating it's usage. An other option is to allow null as a value that always return 0. I've also added a ValueError exception on invalid modes. The new pull request is located at https://github.com/php/php-src/pull/4940 Any comments would be appreciated. Best regards and happy new year. George Peter Banyard [1] https://wiki.php.net/rfc/consistent_type_errors [2] https://github.com/php/php-src/pull/4572