hi,
you can call NAV Web Services from PHP
loook at these posts:
Using XMLports With Web Services
blogs.msdn.com/.../using-dataports-with-web-services.aspx
MS NAV Web Services to/from PHP, receiving and sending data
blog.artea.info/ms-nav-web-services-tofrom-php-receiving-and-sending-data
Connecting to NAV Web Services from PHP
blogs.msdn.com/.../connecting-to-nav-web-services-from-php.aspx
2008-03-13 - Using SOAP PHP with NTLM Authentication
thomas.rabaix.net/.../using-soap-php-with-ntlm-authentication