[Resolved] Simple Math Using Negative numbers?

[JDcrack]

I am hitting my head against the wall here, probably from my caffine withdrawals 🙂

I am doing a very simple mathmatical calulation:
$a = "0.595"; // these values are being pulled from a database
$b = "-.07";

$c = $a + $b;

$c should equal 0.525

But it keeps returning 0.595

I know it has something to do with the signed value, so I even tried:
$c = $a + (0-abs($b));

Still returns 0.595! 😕

I know I am overlooking something totally obvious here. Any help appreciated!

[JDcrack]

SLAPS FORHEAD

OK DUH!!!

I had not declared $b as a float!!!

$c = $a + floatval($b);

http://us2.php.net/manual/en/function.floatval.php