LDIF to LDAP data sync

[subs]

Hi,
    I have an LDIF with some user data. Now i want to write a script
to verify if the user in LDIF is present in LDAP, if yes, sync some
attributes from LDIF to LDAP for that user. If the user is not
present, then create the user in LDAP with the user values in LDIF.
Please let me know the perl code for this