diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index 7a067e7d16d..84c25573e85 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -6605,7 +6605,7 @@ abstract class CommonObject
 			{
 				if(empty($this->{$field}))
 				{
-					$queryarray[$field] = NULL;
+					$queryarray[$field] = null;
 				}
 				else
 				{
diff --git a/htdocs/core/lib/files.lib.php b/htdocs/core/lib/files.lib.php
index bd3b570799c..3d3f38eca2c 100644
--- a/htdocs/core/lib/files.lib.php
+++ b/htdocs/core/lib/files.lib.php
@@ -1139,7 +1139,7 @@ function dol_delete_file($file,$disableglob=0,$nophperrors=0,$nohook=0,$object=n
 	if (preg_match('/\.\./',$file) || preg_match('/[<>|]/',$file))
 	{
 		dol_syslog("Refused to delete file ".$file, LOG_WARNING);
-		return False;
+		return false;
 	}
 
 	if (empty($nohook))
@@ -1238,7 +1238,7 @@ function dol_delete_dir($dir,$nophperrors=0)
 	if (preg_match('/\.\./',$dir) || preg_match('/[<>|]/',$dir))
 	{
 		dol_syslog("Refused to delete dir ".$dir, LOG_WARNING);
-		return False;
+		return false;
 	}
 
 	$dir_osencoded=dol_osencode($dir);
diff --git a/htdocs/fourn/commande/card.php b/htdocs/fourn/commande/card.php
index cec2b306c4e..033cf251d4e 100644
--- a/htdocs/fourn/commande/card.php
+++ b/htdocs/fourn/commande/card.php
@@ -2660,7 +2660,7 @@ elseif (! empty($object->id))
 
 							// Ensure that price is equal and warn user if it's not
 							$supplier_price = price($result_product["product"]["price_net"]); //Price of client tab in supplier dolibarr
-							$local_price = NULL; //Price of supplier as stated in product suppliers tab on this dolibarr, NULL if not found
+							$local_price = null; //Price of supplier as stated in product suppliers tab on this dolibarr, NULL if not found
 
 							$product_fourn = new ProductFournisseur($db);
 							$product_fourn_list = $product_fourn->list_product_fournisseur_price($line->fk_product);
@@ -2675,7 +2675,7 @@ elseif (! empty($object->id))
 								}
 							}
 
-							if ($local_price != NULL && $local_price != $supplier_price) {
+							if ($local_price != null && $local_price != $supplier_price) {
 								setEventMessages($line_id.$langs->trans("RemotePriceMismatch")." ".$supplier_price." - ".$local_price, null, 'warnings');
 							}
 
diff --git a/scripts/accountancy/export-thirdpartyaccount.php b/scripts/accountancy/export-thirdpartyaccount.php
index e5ba6bad702..2d557768d7d 100755
--- a/scripts/accountancy/export-thirdpartyaccount.php
+++ b/scripts/accountancy/export-thirdpartyaccount.php
@@ -201,13 +201,9 @@ if ($resql) {
 	print '<td align="left">' . $langs->trans("Phone") . '</td>';
 	print '<td align="left">' . $langs->trans("Fax") . '</td></tr>';
 
-	$var = True;
-
-	while ( $obj = $db->fetch_object($resql) ) {
-
-		$var = ! $var;
-
-		print '<tr'. $bc[$var].'>';
+	while ($obj = $db->fetch_object($resql))
+	{
+		print '<tr class="oddeven">';
 		print '<td>';
 		$thirdpartystatic->id = $obj->rowid;
 		$thirdpartystatic->name = $obj->name;
diff --git a/test/phpunit/WebservicesInvoicesTest.php b/test/phpunit/WebservicesInvoicesTest.php
index d2d02bde974..fe896894d86 100644
--- a/test/phpunit/WebservicesInvoicesTest.php
+++ b/test/phpunit/WebservicesInvoicesTest.php
@@ -291,7 +291,7 @@ class WebservicesInvoicesTest extends PHPUnit_Framework_TestCase
 
     	// Test URL
     	$result='';
-    	$parameters = array('authentication'=>$authentication,'id'=>NULL,'ref'=>NULL,'ref_ext'=>'ref-phpunit-2');
+    	$parameters = array('authentication'=>$authentication, 'id'=>null, 'ref'=>null, 'ref_ext'=>'ref-phpunit-2');
     	print __METHOD__." call method ".$WS_METHOD."\n";
     	try {
     		$result = $this->soapclient->call($WS_METHOD,$parameters,$this->ns,'');