Fix PHP Warning about invalid argument supplied for foreach

If _POST['members'] or _POST['groups'] is not set / none selected at GUI, it would give a warning on crash reporter (dev versions)

(cherry picked from commit 9f4722022f0e8114741e8cf1a421520fded8be1f)

2 files changed, 10 insertions, 6 deletions

diff --git a/src/usr/local/www/system_groupmanager.php b/src/usr/local/www/system_groupmanager.php
index 9510084..8e0d253 100644
--- a/src/usr/local/www/system_groupmanager.php
+++ b/src/usr/local/www/system_groupmanager.php
@@ -193,9 +193,11 @@ if (isset($_POST['save'])) {
 	}
 
 	/* Check the POSTed members to ensure they are valid and exist */
-	foreach ($_POST['members'] as $newmember) {
-		if (!is_numeric($newmember) || empty(getUserEntryByUID($newmember))) {
-			$input_errors[] = gettext("One or more invalid group members was submitted.");
+	if(is_array($_POST['members'])) {
+		foreach ($_POST['members'] as $newmember) {
+			if (!is_numeric($newmember) || empty(getUserEntryByUID($newmember))) {
+				$input_errors[] = gettext("One or more invalid group members was submitted.");
+			}
 		}
 	}
 
diff --git a/src/usr/local/www/system_usermanager.php b/src/usr/local/www/system_usermanager.php
index 323f931..bb182ca 100644
--- a/src/usr/local/www/system_usermanager.php
+++ b/src/usr/local/www/system_usermanager.php
@@ -237,9 +237,11 @@ if ($_POST['save']) {
 	}
 
 	/* Check the POSTed groups to ensure they are valid and exist */
-	foreach ($_POST['groups'] as $newgroup) {
-		if (empty(getGroupEntry($newgroup))) {
-			$input_errors[] = gettext("One or more invalid groups was submitted.");
+	if(is_array($_POST['groups'])) {
+		foreach ($_POST['groups'] as $newgroup) {
+			if (empty(getGroupEntry($newgroup))) {
+				$input_errors[] = gettext("One or more invalid groups was submitted.");
+			}
 		}
 	}