I can go search Blogs and articles ,but the official documentation is blank. You don't have to take my word for it. http://php.net/manual/en/internals2.apiref.

I can go search Blogs and articles ,but the official documentation is blank. You don't have to take my word for it. http://php.net/manual/en/internals2.apiref.php http://php.net/manual/en/internals2.apiref.php