Not recognizing commas in numbers?

[ERuiz]

I have the following problem:

[code]
$sqlfield13 = "SELECT field13 FROM vb3_userfield WHERE userid = '".$IDPilot."' ";
$Resultfield13  = $MyDb->f_ExecuteSql($sqlfield13);
$PrevHours = $MyDb->f_GetRecord($Resultfield13);
$PrevHours = $PrevHours['field13'];
$PrevHours = number_format($PrevHours);

if ($PrevHours >= 100) {

$PrevHours = 50;

}
else {

$PrevHours = 0;

}
[/code]

In the case above, I get the following results:

if field13 = 234.3 then $PrevHours = 50
if field13 = 72.3 then $PrevHours = 0
if field13 = 1,023.3 then $PrevHours = 0

How come the last situation is giving the wrong result?

Regards,

ERuiz

[JasonLewis]

why must you insert the comma's in the first place?

[Jessica]

number_format is only for when you need to print them out or turn them into strings. If you want to keep doing math with a number (or do comparisons in which it is a number), no commas allowed. Don't use number_format up there.