[php-src] Issue #8397: crypt() accepts invalid characters in salt

Issue: https://github.com/php/php-src/issues/8397 Comment Author: martenlehmann There is surely a benefit of PHP's cross-platform implementation of crypt(), because otherwise this function wouldn't be available on non-UNIX platforms. In Python you would use the [passlib](https://pypi.org/project/passlib/) password hashing library, which is not part of the standard library and the standard [crypt](https://docs.python.org/3/library/crypt.html#module-crypt) module simply wouldn't work on eg. Windows. What I'm missing in PHP, however, is a way to explicitly make use of and test against the OS's crypt() function.