[SOLVED] Adding Values

[cheechm]

How would I add all the values of

${'cost' . $i} 

?

 

 $num_rows = 3;
            $i = 0;
            while ($i < $num_rows) {
                ${'cost' . $i} = $_POST['cost' . $i];
$i++
}

 

Thanks

[marcus]

You're probably better off just defining individual variables.

 

$cost1 = $_POST['cost1'];
$cost2 = $_POST['cost2'];
$cost3 = $_POST['cost3'];

 

Or something like

 

$cost[] = $_POST['cost' . $i]; // inside your while statement
echo array_sum($cost); // after your while statement

[cheechm]

Sorry, $num_rows is usually an undefined value.

 

I get this error though:

Fatal error: [] operator not supported for strings

 

(When using the second one)

 

EDIT: Cancel that. All fixed. Thanks!