diff --git a/htdocs/contact/consumption.php b/htdocs/contact/consumption.php
index 2b2e52e1bad..1e82f807105 100644
--- a/htdocs/contact/consumption.php
+++ b/htdocs/contact/consumption.php
@@ -46,7 +46,7 @@ if ($id > 0) {
 if (empty($object->thirdparty)) {
 	$object->fetch_thirdparty();
 }
-$socid = $object->thirdparty->id;
+$socid = !empty($object->thirdparty->id) ? $object->thirdparty->id : null;
 
 // Sort & Order fields
 $limit = GETPOST('limit', 'int') ? GETPOST('limit', 'int') : $conf->liste_limit;
@@ -153,7 +153,7 @@ print '<tr><td class="titlefield">'.$langs->trans("UserTitle").'</td><td>';
 print $object->getCivilityLabel();
 print '</td></tr>';
 
-if ($object->thirdparty->client) {
+if (!empty($object->thirdparty->client)) {
 	$thirdTypeArray['customer'] = $langs->trans("customer");
 	if (isModEnabled("propal") && $user->hasRight('propal', 'lire')) {
 		$elementTypeArray['propal'] = $langs->transnoentitiesnoconv('Proposals');
@@ -173,7 +173,7 @@ if (isModEnabled('ficheinter') && $user->hasRight('ficheinter', 'lire')) {
 	$elementTypeArray['fichinter'] = $langs->transnoentitiesnoconv('Interventions');
 }
 
-if ($object->thirdparty->fournisseur) {
+if (!empty($object->thirdparty->fournisseur)) {
 	$thirdTypeArray['supplier'] = $langs->trans("supplier");
 	if ((isModEnabled("fournisseur") && !getDolGlobalString('MAIN_USE_NEW_SUPPLIERMOD') && $user->hasRight('fournisseur', 'facture', 'lire')) || (isModEnabled("supplier_invoice") && $user->hasRight('supplier_invoice', 'lire'))) {
 		$elementTypeArray['supplier_invoice'] = $langs->transnoentitiesnoconv('SuppliersInvoices');
@@ -364,7 +364,9 @@ $param .= "&sref=".urlencode($sref);
 $param .= "&month=".urlencode($month);
 $param .= "&year=".urlencode($year);
 $param .= "&sprod_fulldescr=".urlencode($sprod_fulldescr);
-$param .= "&socid=".urlencode($socid);
+if (!empty($socid)) {
+	$param .= "&socid=".urlencode($socid);
+}
 $param .= "&type_element=".urlencode($type_element);
 
 $total_qty = 0;
@@ -377,7 +379,7 @@ if ($sql_select) {
 
 	$num = $db->num_rows($resql);
 
-	$param = "&socid=".urlencode($socid)."&type_element=".urlencode($type_element)."&id=".urlencode($id);
+	$param = (!empty($socid) ? "&socid=".urlencode($socid) : "")."&type_element=".urlencode($type_element)."&id=".urlencode($id);
 	if (!empty($contextpage) && $contextpage != $_SERVER["PHP_SELF"]) {
 		$param .= '&contextpage='.urlencode($contextpage);
 	}
diff --git a/htdocs/contact/project.php b/htdocs/contact/project.php
index a28bdd861d1..9cc60d2cbe4 100644
--- a/htdocs/contact/project.php
+++ b/htdocs/contact/project.php
@@ -61,7 +61,7 @@ if ($id) {
 	if (empty($object->thirdparty)) {
 		$object->fetch_thirdparty();
 	}
-	$socid = $object->thirdparty->id;
+	$socid = !empty($object->thirdparty->id) ? $object->thirdparty->id : null;
 	$title = $langs->trans("Projects");
 	if (getDolGlobalString('MAIN_HTML_TITLE') && preg_match('/thirdpartynameonly/', $conf->global->MAIN_HTML_TITLE) && $object->name) {
 		$title = $object->name." - ".$title;
diff --git a/htdocs/core/db/DoliDB.class.php b/htdocs/core/db/DoliDB.class.php
index 498183faca6..3b1184c7f85 100644
--- a/htdocs/core/db/DoliDB.class.php
+++ b/htdocs/core/db/DoliDB.class.php
@@ -296,7 +296,7 @@ abstract class DoliDB implements Database
 			$oldsortorder = '';
 			$return = '';
 			$fields = explode(',', $sortfield);
-			$orders = explode(',', $sortorder);
+			$orders = (!empty($sortorder) ? explode(',', $sortorder) : array());
 			$i = 0;
 			foreach ($fields as $val) {
 				if (!$return) {
diff --git a/htdocs/core/lib/company.lib.php b/htdocs/core/lib/company.lib.php
index 9d1e5192bbe..250a6a34756 100644
--- a/htdocs/core/lib/company.lib.php
+++ b/htdocs/core/lib/company.lib.php
@@ -1692,7 +1692,7 @@ function show_actions_done($conf, $langs, $db, $filterobj, $objcon = '', $noprin
 		$sql .= " LEFT JOIN ".MAIN_DB_PREFIX."user as u on u.rowid = a.fk_user_action";
 		$sql .= " LEFT JOIN ".MAIN_DB_PREFIX."c_actioncomm as c ON a.fk_action = c.id";
 
-		if (get_class($filterobj) !== 'User') {
+		if (is_object($filterobj) && get_class($filterobj) !== 'User') {
 			$force_filter_contact = false;
 		} else {
 			$force_filter_contact = true;
diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index e045071dfc1..e42e6161064 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -1145,7 +1145,7 @@ class Product extends CommonObject
 		$this->barcode = (empty($this->barcode) ? '' : trim($this->barcode));
 
 		$this->accountancy_code_buy = trim($this->accountancy_code_buy);
-		$this->accountancy_code_buy_intra = trim($this->accountancy_code_buy_intra);
+		$this->accountancy_code_buy_intra = (!empty($this->accountancy_code_buy_intra) ? trim($this->accountancy_code_buy_intra) : '');
 		$this->accountancy_code_buy_export = trim($this->accountancy_code_buy_export);
 		$this->accountancy_code_sell = trim($this->accountancy_code_sell);
 		$this->accountancy_code_sell_intra = trim($this->accountancy_code_sell_intra);
diff --git a/htdocs/product/price.php b/htdocs/product/price.php
index a7557f75bb9..a2abdf524a3 100644
--- a/htdocs/product/price.php
+++ b/htdocs/product/price.php
@@ -2420,7 +2420,7 @@ if (getDolGlobalString('PRODUIT_CUSTOMER_PRICES')) {
 					$positiverates = '0';
 				}
 
-				echo vatrate($positiverates.($line->default_vat_code ? ' ('.$line->default_vat_code.')' : ''), '%', ($line->tva_npr ? $line->tva_npr : $line->recuperableonly));
+				echo vatrate($positiverates.($line->default_vat_code ? ' ('.$line->default_vat_code.')' : ''), '%', (!empty($line->tva_npr) ? $line->tva_npr : $line->recuperableonly));
 
 				print "</td>";
 
diff --git a/htdocs/societe/class/societe.class.php b/htdocs/societe/class/societe.class.php
index b19c0b8a695..b2342b78b7d 100644
--- a/htdocs/societe/class/societe.class.php
+++ b/htdocs/societe/class/societe.class.php
@@ -255,7 +255,7 @@ class Societe extends CommonObject
 		'localtax2_value' =>array('type'=>'double(6,3)', 'label'=>'Localtax2 value', 'enabled'=>1, 'visible'=>-1, 'position'=>355),
 		'vat_reverse_charge' =>array('type'=>'tinyint(4)', 'label'=>'Vat reverse charge', 'enabled'=>1, 'visible'=>-1, 'position'=>335),
 		'barcode' =>array('type'=>'varchar(255)', 'label'=>'Barcode', 'enabled'=>1, 'visible'=>-1, 'position'=>360),
-		'price_level' =>array('type'=>'integer', 'label'=>'Price level', 'enabled'=>'$conf->global->PRODUIT_MULTIPRICES || $conf->global->PRODUIT_CUSTOMER_PRICES_BY_QTY_MULTIPRICES', 'visible'=>-1, 'position'=>365),
+		'price_level' =>array('type'=>'integer', 'label'=>'Price level', 'enabled'=>'$conf->global->PRODUIT_MULTIPRICES || getDolGlobalString("PRODUIT_CUSTOMER_PRICES_BY_QTY_MULTIPRICES")', 'visible'=>-1, 'position'=>365),
 		'default_lang' =>array('type'=>'varchar(6)', 'label'=>'Default lang', 'enabled'=>1, 'visible'=>-1, 'position'=>370),
 		'canvas' =>array('type'=>'varchar(32)', 'label'=>'Canvas', 'enabled'=>1, 'visible'=>-1, 'position'=>375),
 		'fk_barcode_type' =>array('type'=>'integer', 'label'=>'Fk barcode type', 'enabled'=>1, 'visible'=>-1, 'position'=>405),