//
// Numeric input check.
// Return 1 if number has proper form and is within <min, max> range
+// Empty/not defined fields are defaulted to $dflt value.
//
-function check_num($postname, $min=null, $max=null) {
+function check_num($postname, $min=null, $max=null, $dflt=0) {
if(!isset($_POST[$postname]))
return 0;
- $num = input_num($postname);
- if ($num === false)
+ $num = input_num($postname, $dflt);
+ if ($num === false || $num === null)
return 0;
if (isset($min) && ($num<$min))
return 0;