downloading page then searching xhtml for particular tag with specific name

[schoi]

I'm integrating two sites together for a friend.   However the site I'm integrating to has a security token system within the the login form. It's only a hidden text field. I can use curl to programmatically post the username and password to their login script and it works. but how do I obtain the token? It gives an error saying "invalid authenticity token"  I was thinking of downloading the page then searching the xhtml but how do I search for an input tag with a given name?

[waynew]

strpos()

 

Then work it out from there.