Easiest way of using a ' in a string

[murfitUK]

I have an html form with input type=text and name=line1. This calls reply.php using method=post.reply.php has:$line=$_POST['line1'];print $line;and does some other stuff.My problem is if the user types a ' in the form input eg I can't do that. It displays as I can\'t do that.What is the easiest way of solving this?I'm only asking because I know someone will have a quick answer. If I try and sort it by reading the manual I'll end up write 100s of lines of script!

[justsomeguy]

$line = stripslashes($_POST['line1']);