How to use php to write a new document on the server?

[jaxdevil]

I have language files I want to be editable by the user. So I have a form that will pull all the DEFINE entries as form fields, which they can then edit how they want, then when the form is posted I want it to put those variables (each lines new value) into a spot on a new language file and write it to the server, overwriting the old one. How do you do this?

[unkwntech]

check out

http://php.net/fopen

http://php.net/fread

http://php.net/fwrite