问题
I am running php version 5.4.16 on localhost right now, while I am developing my site. I want to use password_hash(), but I keep getting this error:
Fatal error: Call to undefined function password_hash() in /dir/to/file.php on line 123
Why is this happening?
Thanks!
回答1:
The new password_* methods are only available as of PHP 5.5:
http://www.php.net/manual/en/function.password-hash.php
Take a look at this library that provides forward compatibility:
https://github.com/ircmaxell/password_compat
You can use that to get access to the new password_* methods until you are able to run PHP 5.5.
来源：https://stackoverflow.com/questions/20955465/call-to-undefined-function-password-hash