diff --git a/htdocs/admin/const.php b/htdocs/admin/const.php
index 783d6916c7b..a2b4ae4d909 100644
--- a/htdocs/admin/const.php
+++ b/htdocs/admin/const.php
@@ -74,7 +74,7 @@ if (! empty($consts) && $update == $langs->trans("Modify"))
 {
 	foreach($consts as $const)
 	{
-		if ($const["check"])
+		if (! empty($const["check"]))
 		{
 			if (dolibarr_set_const($db, $const["name"],$const["value"],$const["type"],1,$const["note"],$const["entity"]) < 0)
 			{
@@ -89,7 +89,7 @@ if (! empty($consts) && $delete == $langs->trans("Delete"))
 {
 	foreach($consts as $const)
 	{
-		if ($const["check"])	// Is checkbox checked
+		if (! empty($const["check"]))	// Is checkbox checked
 		{
 			if (dolibarr_del_const($db, $const["rowid"], -1) < 0)
 			{
diff --git a/htdocs/compta/facture.php b/htdocs/compta/facture.php
index ac5c2afde9e..5ff20189268 100644
--- a/htdocs/compta/facture.php
+++ b/htdocs/compta/facture.php
@@ -38,8 +38,8 @@ require_once(DOL_DOCUMENT_ROOT.'/compta/paiement/class/paiement.class.php');
 require_once(DOL_DOCUMENT_ROOT."/core/lib/functions2.lib.php");
 require_once(DOL_DOCUMENT_ROOT.'/core/lib/invoice.lib.php');
 require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
-if ($conf->commande->enabled) require_once(DOL_DOCUMENT_ROOT.'/commande/class/commande.class.php');
-if ($conf->projet->enabled)
+if (! empty($conf->commande->enabled)) require_once(DOL_DOCUMENT_ROOT.'/commande/class/commande.class.php');
+if (! empty($conf->projet->enabled))
 {
 	require_once(DOL_DOCUMENT_ROOT.'/projet/class/project.class.php');
 	require_once(DOL_DOCUMENT_ROOT.'/core/lib/project.lib.php');
@@ -52,6 +52,9 @@ $langs->load('companies');
 $langs->load('products');
 $langs->load('main');
 
+$mesg='';
+$errors=array();
+
 if (GETPOST('mesg','int',1) && isset($_SESSION['message'])) $mesg=$_SESSION['message'];
 
 $sall=trim(GETPOST('sall'));
@@ -82,7 +85,7 @@ $result = restrictedArea($user, 'facture', $id,'','','fk_soc',$fieldid);
 // Nombre de ligne pour choix de produit/service predefinis
 $NBLINES=4;
 
-$usehm=$conf->global->MAIN_USE_HOURMIN_IN_DATE_RANGE;
+$usehm=(! empty($conf->global->MAIN_USE_HOURMIN_IN_DATE_RANGE)?$conf->global->MAIN_USE_HOURMIN_IN_DATE_RANGE:0);
 
 $object=new Facture($db);
 
@@ -1286,7 +1289,7 @@ else if ($action == 'down' && $user->rights->facture->creer)
 /*
  * Add file in email form
  */
-if ($_POST['addfile'])
+if (GETPOST('addfile'))
 {
     require_once(DOL_DOCUMENT_ROOT."/core/lib/files.lib.php");
 
@@ -2372,7 +2375,7 @@ else if ($id > 0 || ! empty($ref))
         print '<table class="nobordernopadding" width="100%">';
         print '<tr><td>'.$langs->trans('Company').'</td>';
         print '</td><td colspan="5">';
-        if ($conf->global->FACTURE_CHANGE_THIRDPARTY && $action != 'editthirdparty' && $object->brouillon && $user->rights->facture->creer)
+        if (! empty($conf->global->FACTURE_CHANGE_THIRDPARTY) && $action != 'editthirdparty' && $object->brouillon && $user->rights->facture->creer)
         print '<td align="right"><a href="'.$_SERVER["PHP_SELF"].'?action=editthirdparty&amp;facid='.$object->id.'">'.img_edit($langs->trans('SetLinkToThirdParty'),1).'</a></td>';
         print '</tr></table>';
         print '</td><td colspan="5">';
@@ -3017,7 +3020,7 @@ else if ($id > 0 || ! empty($ref))
                     }
                 }
 
-                if ($conf->global->FACTURE_SHOW_SEND_REMINDER)	// For backward compatibility
+                if (! empty($conf->global->FACTURE_SHOW_SEND_REMINDER))	// For backward compatibility
                 {
                     if (($object->statut == 1 || $object->statut == 2) && $resteapayer > 0)
                     {
diff --git a/htdocs/core/lib/functions2.lib.php b/htdocs/core/lib/functions2.lib.php
index 212af105564..fd79483cf83 100644
--- a/htdocs/core/lib/functions2.lib.php
+++ b/htdocs/core/lib/functions2.lib.php
@@ -531,7 +531,7 @@ function get_next_value($db,$mask,$table,$field,$where='',$objsoc='',$date='',$m
 
     // Extract value for mask counter, mask raz and mask offset
     if (! preg_match('/\{(0+)([@\+][0-9]+)?([@\+][0-9]+)?\}/i',$mask,$reg)) return 'ErrorBadMask';
-    $masktri=$reg[1].$reg[2].$reg[3];
+    $masktri=$reg[1].(! empty($reg[2])?$reg[2]:'').(! empty($reg[3])?$reg[3]:'');
     $maskcounter=$reg[1];
     $maskraz=-1;
     $maskoffset=0;
@@ -558,7 +558,11 @@ function get_next_value($db,$mask,$table,$field,$where='',$objsoc='',$date='',$m
         $masktype_value=substr(preg_replace('/^TE_/','',$objsoc->typent_code),0,dol_strlen($regType[1]));//get n first characters of client code where n is length in mask
         $masktype_value=str_pad($masktype_value,dol_strlen($regType[1]),"#",STR_PAD_RIGHT);
     }
-    else $masktype='';
+    else
+    {
+    	$masktype='';
+    	$masktype_value='';
+    }
 
     $maskwithonlyymcode=$mask;
     $maskwithonlyymcode=preg_replace('/\{(0+)([@\+][0-9]+)?([@\+][0-9]+)?\}/i',$maskcounter,$maskwithonlyymcode);
diff --git a/htdocs/core/tpl/ajaxrow.tpl.php b/htdocs/core/tpl/ajaxrow.tpl.php
index cd66372604b..bb26c2d891e 100644
--- a/htdocs/core/tpl/ajaxrow.tpl.php
+++ b/htdocs/core/tpl/ajaxrow.tpl.php
@@ -19,7 +19,7 @@
 ?>
 
 <!-- BEGIN PHP TEMPLATE FOR JQUERY -->
-<?php if (count($object->lines) > 1 && $_GET['action'] != 'editline') { ?>
+<?php if (count($object->lines) > 1 && GETPOST('action') != 'editline') { ?>
 <script>
 $(document).ready(function(){
 	$(".imgup").hide();