Fix save learning path without enable start time - refs BT#12085

main/lp/learnpath.class.php

@@ -779,12 +779,13 @@ class learnpath
         if (empty($publicated_on)) {
             //by default the publication date is the same that the creation date
             //The behaviour above was changed due BT#2800
-            global $_custom;
-            if (isset($_custom['lps_hidden_when_no_start_date']) && $_custom['lps_hidden_when_no_start_date']) {
-                $publicated_on = '';
-            } else {
-                $publicated_on = api_get_utc_datetime();
-            }
+//            global $_custom;
+//            if (isset($_custom['lps_hidden_when_no_start_date']) && $_custom['lps_hidden_when_no_start_date']) {
+//                $publicated_on = null;
+//            } else {
+//                $publicated_on = null;
+//            }
+            $publicated_on = null;
         } else {
             $publicated_on = Database::escape_string(api_get_utc_datetime($publicated_on));
         }

main/lp/lp_edit.php

@@ -157,7 +157,7 @@ $form->addElement(
 );
 
 $display_date = 'none';
-if (!empty($publicated_on)) {
+if (!empty($publicated_on) && $publicated_on !== '0000-00-00 00:00:00') {
     $display_date = 'block';
     $defaults['activate_start_date_check'] = 1;
 }
@@ -220,7 +220,7 @@ if ($enableLpExtraFields) {
 }
 
 
-$defaults['publicated_on'] = (!empty($publicated_on))? api_get_local_time($publicated_on) : date('Y-m-d 12:00:00');
+$defaults['publicated_on'] = !empty($publicated_on) && $publicated_on !== '0000-00-00 00:00:00' ? api_get_local_time($publicated_on) : null;
 $defaults['expired_on'] = (!empty($expired_on) )? api_get_local_time($expired_on): date('Y-m-d 12:00:00', time()+84600);
 $defaults['subscribe_users'] = $_SESSION['oLP']->getSubscribeUsers();
 $form->setDefaults($defaults);