Writing to a file

I'm am able to open the file read and write to it. The problem is that I want to replace a line of text with another line. My function is actually writing my new line after the line I wanted to change. Can we do arithmetic on the $fd (file handle or file descriptor)? To tell PHP to write where ( $fd - 1 ) points to? -- Gerardo S. Rojas mailto: grojas@strategicinc.com