From 1b1ab6a66eb859f0e1232872a096620bef70df87 Mon Sep 17 00:00:00 2001
From: logmanoriginal <logmanoriginal@users.noreply.github.com>
Date: Thu, 17 Aug 2017 18:52:17 +0200
Subject: [PATCH] [validation] Fix error on undefined optional numeric value

Providing no value for an optional numeric parameter results in
error "Parameter *** is invalid!"

This is caused by the validation function ignoring the 'required'
attribute when loading and checking input parameters.

This commit adds checks to determine whether the 'required' attri-
bute is defined and active before returning the error message.

References #570:
---
 lib/validation.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/validation.php b/lib/validation.php
index e405b7c0..fdcb51c5 100644
--- a/lib/validation.php
+++ b/lib/validation.php
@@ -80,7 +80,7 @@ function validateData(&$data, $parameters){
 					break;
 				}
 
-				if(is_null($data[$name])) {
+				if(is_null($data[$name]) && isset($set[$name]['required']) && $set[$name]['required']) {
 					echo 'Parameter \'' . $name . '\' is invalid!' . PHP_EOL;
 					return false;
 				}