diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index ce71b953208..fc740b5215a 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -1865,11 +1865,11 @@ abstract class CommonObject
         $sourcetype = (! empty($sourcetype) ? $sourcetype : $this->element);
         $targettype = (! empty($targettype) ? $targettype : $this->element);
 
-        if (empty($sourceid) && empty($targetid))
+        /*if (empty($sourceid) && empty($targetid))
         {
         	dol_syslog('Bad usage of function. No source nor target id defined (nor as parameter nor as object id)', LOG_ERROR);
         	return -1;
-        }
+        }*/
 
         // Links beetween objects are stored in this table
         $sql = 'SELECT fk_source, sourcetype, fk_target, targettype';
diff --git a/htdocs/core/lib/pdf.lib.php b/htdocs/core/lib/pdf.lib.php
index 794ba7ac2af..0350bce7a4b 100644
--- a/htdocs/core/lib/pdf.lib.php
+++ b/htdocs/core/lib/pdf.lib.php
@@ -1585,55 +1585,52 @@ function pdf_getLinkedObjects($object,$outputlangs)
 		if ($objecttype == 'propal')
 		{
 			$outputlangs->load('propal');
-			$num=count($objects);
-			for ($i=0;$i<$num;$i++)
+			
+			foreach($objects as $elementobject)
 			{
 				$linkedobjects[$objecttype]['ref_title'] = $outputlangs->transnoentities("RefProposal");
-				$linkedobjects[$objecttype]['ref_value'] = $outputlangs->transnoentities($objects[$i]->ref);
+				$linkedobjects[$objecttype]['ref_value'] = $outputlangs->transnoentities($elementobject->ref);
 				$linkedobjects[$objecttype]['date_title'] = $outputlangs->transnoentities("DatePropal");
-				$linkedobjects[$objecttype]['date_value'] = dol_print_date($objects[$i]->date,'day','',$outputlangs);
+				$linkedobjects[$objecttype]['date_value'] = dol_print_date($elementobject->date,'day','',$outputlangs);
 			}
 		}
 		else if ($objecttype == 'commande')
 		{
 			$outputlangs->load('orders');
-			$num=count($objects);
-			for ($i=0;$i<$num;$i++)
+			foreach($objects as $elementobject)
 			{
 				$linkedobjects[$objecttype]['ref_title'] = $outputlangs->transnoentities("RefOrder");
-				$linkedobjects[$objecttype]['ref_value'] = $outputlangs->transnoentities($objects[$i]->ref) . ($objects[$i]->ref_client ? ' ('.$objects[$i]->ref_client.')' : '');
+				$linkedobjects[$objecttype]['ref_value'] = $outputlangs->transnoentities($elementobject->ref) . ($elementobject->ref_client ? ' ('.$elementobject->ref_client.')' : '');
 				$linkedobjects[$objecttype]['date_title'] = $outputlangs->transnoentities("OrderDate");
-				$linkedobjects[$objecttype]['date_value'] = dol_print_date($objects[$i]->date,'day','',$outputlangs);
+				$linkedobjects[$objecttype]['date_value'] = dol_print_date($elementobject->date,'day','',$outputlangs);
 			}
 		}
 		else if ($objecttype == 'contrat')
 		{
 			$outputlangs->load('contracts');
-			$num=count($objects);
-			for ($i=0;$i<$num;$i++)
+			foreach($objects as $elementobject)
 			{
 				$linkedobjects[$objecttype]['ref_title'] = $outputlangs->transnoentities("RefContract");
-				$linkedobjects[$objecttype]['ref_value'] = $outputlangs->transnoentities($objects[$i]->ref);
+				$linkedobjects[$objecttype]['ref_value'] = $outputlangs->transnoentities($elementobject->ref);
 				$linkedobjects[$objecttype]['date_title'] = $outputlangs->transnoentities("DateContract");
-				$linkedobjects[$objecttype]['date_value'] = dol_print_date($objects[$i]->date_contrat,'day','',$outputlangs);
+				$linkedobjects[$objecttype]['date_value'] = dol_print_date($elementobject->date_contrat,'day','',$outputlangs);
 			}
 		}
 		else if ($objecttype == 'shipping')
 		{
 			$outputlangs->load('orders');
 			$outputlangs->load('sendings');
-			$num=count($objects);
-			for ($i=0;$i<$num;$i++)
+			foreach($objects as $elementobject)
 			{
-				$objects[$i]->fetchObjectLinked();
-				$order = $objects[$i]->linkedObjects['commande'][0];
+				$elementobject->fetchObjectLinked();
+				$order = $elementobject->linkedObjects['commande'][0];
 
 				$linkedobjects[$objecttype]['ref_title'] = $outputlangs->transnoentities("RefOrder") . ' / ' . $outputlangs->transnoentities("RefSending");
 				$linkedobjects[$objecttype]['ref_value'] = $outputlangs->transnoentities($order->ref) . ($order->ref_client ? ' ('.$order->ref_client.')' : '');
-				$linkedobjects[$objecttype]['ref_value'].= ' / ' . $outputlangs->transnoentities($objects[$i]->ref);
+				$linkedobjects[$objecttype]['ref_value'].= ' / ' . $outputlangs->transnoentities($elementobject->ref);
 				$linkedobjects[$objecttype]['date_title'] = $outputlangs->transnoentities("OrderDate") . ' / ' . $outputlangs->transnoentities("DateSending");
 				$linkedobjects[$objecttype]['date_value'] = dol_print_date($order->date,'day','',$outputlangs);
-				$linkedobjects[$objecttype]['date_value'].= ' / ' . dol_print_date($objects[$i]->date_delivery,'day','',$outputlangs);
+				$linkedobjects[$objecttype]['date_value'].= ' / ' . dol_print_date($elementobject->date_delivery,'day','',$outputlangs);
 			}
 		}
 	}