php encryption security

Question

Hi guys.
How to create custom or personal encryption function then call it when user enter password during signup and login.

Answer 1

use $_POST to send data to your web page and use hash to create password there are many way to create hash or encrypted password. Examples like
md5();,sha1();, password_hash();
last one is the safest no one can decode even password is weak.
try to use alphanumeric password that is hard to decode.

Answer 2

Some reading here http://php.net/manual/en/faq.passwords.php

Answer 3

use the $-POST