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