converting a password database from perl to php

Hi all, I'm converting a site written in perl to php. It has a member section which is password protected. All the meber passwords are stored in a flat file with Perl's MD5 encryption algorithm. I'm planning to use MYSQL database to store the member info on the new site. However, I have to import the existing member information including their passwords to the new system. I was checking the md5() and crypt() functions of PHP but theydon't generate the same encrypted password as Perl md5(). Is there any way I can migrate these passwords to php without asking each user to update their password on the new system ? Regards R'twick