Arithmetic Operators problem!!

[Anon]

Hi, I'm looking to add to results from different text fields together via an arithmetic operator, e.g. $a + $b.

So, why doesn't the following work?

<?php

$sum = "$a + $b";

echo $sum;

?>

I'm sure I've done something wrong, as I'm a PHP beginner so any help would be appreciated.

[brandonschnell]

<?php

$sum = $a + $b;

echo $sum;

?>

by placing quotes around the operation you're telling php to handle it like a string.