Required Modules: These modules must be compiled into your PHP installation.

    * --enable-mbstring - Only needed for PHP 4. PHP 5 has built-in multi-byte string support.
    * --with-xml
    * --with-pear
    * --with-curl
    * --with-openssl
    * --with-zlib
    * Do not disable posix (--disable-posix) when compiling. 

Database Specific Connectors: Your PHP installation must be compiled with the required module depending on your database.

    * --with-mysql - For MySQL connectivity
    * --with-oci-8=/path/to/oracle - See below for acquiring the Oracle driver. For Oracle connectivity, the Oracle client is also required.
    * --with-mssql=/path/to/freetds. And FreeTDS should be compiled using --enable-msdblib. For SQL Server support, you will need to follow these SQL Server configuration steps which include required configurations in php.ini. 


For Inbound Email support (POP3 or IMAP):

    * --with-imap - imap 2004i
    * --with-imap-ssl=/path/to/openssl.