[PHP] Grabbing data up to \n

[Jeff Lewis]

I am grabbing lines of a file using:

$buffer = fgets($fd, 4096);

How can I grab the line up to \n or does this do it?  Like if the line is only a few 
characters, it will only grab up to \n?

And if the line up to the \n is a huge message will I still be able to grab all of it 
with the 4096?

Jeff