+ return $myrow[0] > 0;
+}
+//
+// Integer input check
+// Return 1 if number has proper form and is within <min, max> range
+//
+function check_int($postname, $min=null, $max=null) {
+ if(!isset($_POST[$postname]))
+ return 0;
+ $num = input_num($postname);
+ if(!is_int($num))
+ return 0;
+ if (isset($min) && ($num<$min))
+ return 0;
+ if (isset($max) && ($num>$max))
+ return 0;
+ return 1;
+}
+//
+// 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, $dflt=0) {
+ if(!isset($_POST[$postname]))
+ return 0;
+ $num = input_num($postname, $dflt);
+ if ($num === false || $num === null)
+ return 0;
+ if (isset($min) && ($num<$min))
+ return 0;
+ if (isset($max) && ($num>$max))
+ return 0;
+ return 1;
+}
+
+function check_is_closed($type, $type_no, $msg=null)
+{
+ global $systypes_array;
+
+ if (($type_no > 0) && is_closed_trans($type, $type_no))
+ {
+ if (!$msg)
+ $msg = sprintf(_("%s #%s is closed for further edition."), $systypes_array[$type], $type_no);
+ display_error($msg, true);
+ end_page();
+ exit;
+ }