Does the crypt function work differently on different servers?

Question

PHP

Hello! Finally, I posted the site on reg.ru hosting, I decided that everything would be okay, because hosting is well-known, and the project is very important, but problems immediately arose: the first one is question marks on one of the pages, despite the fact that the title is utf-8 and the page is in the same encoding, without bom, no idea what to do at all, it worked on free hosting, change hosting? And the second is that it is not able to go to the admin panel, sat puzzled why, then decided to test, remove the code for the session and led hashes:
$ 2a $ 10 $ xaYVTePkDySPax6sg3Y2 $ .. m / nqSx6hdakJ4APRsE8gq1k7o5qf26
$ 2a $ 10 $ xaYVTePkDySPax6sg3Y2 $ em / nqSx6hdakJ4APRsE8gq1k7o5qf26
I see that the difference is one character, but why? The php version is the same. What could it be, please tell me!

Answer 1

Not enough information, is the site static or dynamic (with the output from the database)?
1) If there are question marks in any content, both in the one that is output from the database, and in the one that is wrapped in the template
In addition to the header in php and Content-Type, it happens that you also need to set the correct encoding in the settings in the hosting admin panel .
And look at the AddDefaultCharset setting in .htaccess.
2) If the questions are only when outputting data from the database, then check the encoding when connecting to the database