Creating an authentication system

 The PEAR::Auth package provides methods for creating an authentication
 system using PHP.
 .
 Currently it supports the following storage containers to read/write
 the login data:
 .
    * All databases supported by the PEAR database layer
    * All databases supported by the MDB database layer
    * All databases supported by the MDB2 database layer
    * Plaintext files
    * LDAP servers
    * POP3 servers
    * IMAP servers
    * vpopmail accounts (Using either PECL vpopmail or PEAR Net_Vpopmaild)
    * RADIUS
    * SAMBA password files
    * SOAP (Using either PEAR SOAP package or PHP5 SOAP extension)
    * PEAR website
    * Kerberos V servers
    * SAP servers