diff --git a/htdocs/accountancy/bookkeeping/listbyaccount.php b/htdocs/accountancy/bookkeeping/listbyaccount.php
index d1ef1377994..bacfdcb714a 100644
--- a/htdocs/accountancy/bookkeeping/listbyaccount.php
+++ b/htdocs/accountancy/bookkeeping/listbyaccount.php
@@ -348,7 +348,7 @@ while ($i < min($num, $limit))
 		$colspan = 9;
 		print "<tr>";
 		print '<td colspan="'.$colspan.'" style="font-weight:bold; border-bottom: 1pt solid black;">';
-		if (! empty($line->numero_compte) && $line->numero_compte != '-1') print length_accountg($line->numero_compte) . ' : ' . $object->get_compte_desc($line->numero_compte);
+		if ($line->numero_compte != "" && $line->numero_compte != '-1') print length_accountg($line->numero_compte) . ' : ' . $object->get_compte_desc($line->numero_compte);
 		else print '<span class="error">'.$langs->trans("Unknown").'</span>';
 		print '</td>';
 		print '</tr>';
diff --git a/htdocs/accountancy/class/lettering.class.php b/htdocs/accountancy/class/lettering.class.php
index a0c977a8d5a..2a89c6c1c96 100644
--- a/htdocs/accountancy/class/lettering.class.php
+++ b/htdocs/accountancy/class/lettering.class.php
@@ -67,11 +67,11 @@ class Lettering extends BookKeeping
 		$sql .= " FROM " . MAIN_DB_PREFIX . "accounting_bookkeeping as bk";
 		$sql .= " LEFT JOIN  " . MAIN_DB_PREFIX . "bank_url as bu ON(bk.fk_doc = bu.fk_bank AND bu.type IN ('payment', 'payment_supplier') ) ";
 		$sql .= " WHERE ( ";
-		if (! empty($object->code_compta))
+		if ($object->code_compta != "")
 			$sql .= " bk.subledger_account = '" . $object->code_compta . "'  ";
-		if (! empty($object->code_compta) && ! empty($object->code_compta_fournisseur))
+		if ($object->code_compta != "" && $object->code_compta_fournisseur != "")
 			$sql .= " OR ";
-		if (! empty($object->code_compta_fournisseur))
+		if ($object->code_compta_fournisseur != "")
 			$sql .= " bk.subledger_account = '" . $object->code_compta_fournisseur . "' ";
 
 		$sql .= " ) AND (bk.date_lettering ='' OR bk.date_lettering IS NULL) ";
@@ -99,13 +99,13 @@ class Lettering extends BookKeeping
 					$sql .= " AND facf.entity = ".$conf->entity;
 					$sql .= " AND code_journal IN (SELECT code FROM " . MAIN_DB_PREFIX . "accounting_journal WHERE nature=4 AND entity=".$conf->entity.") ";
 					$sql .= " AND ( ";
-					if (! empty($object->code_compta)) {
+					if ($object->code_compta != "") {
 						$sql .= "  bk.subledger_account = '" . $object->code_compta . "'  ";
 					}
-					if (! empty($object->code_compta) && ! empty($object->code_compta_fournisseur)) {
+					if ($object->code_compta != "" && $object->code_compta_fournisseur != "") {
 						$sql .= "  OR  ";
 					}
-					if (! empty($object->code_compta_fournisseur)) {
+					if ($object->code_compta_fournisseur != "") {
 						$sql .= "   bk.subledger_account = '" . $object->code_compta_fournisseur . "' ";
 					}
 					$sql .= " )  ";
@@ -127,13 +127,13 @@ class Lettering extends BookKeeping
 						$sql .= " WHERE bk.code_journal IN (SELECT code FROM " . MAIN_DB_PREFIX . "accounting_journal WHERE nature=3 AND entity=".$conf->entity.") ";
 						$sql .= " AND facf.entity = ".$conf->entity;
 						$sql .= " AND ( ";
-						if (! empty($object->code_compta)) {
+						if ($object->code_compta != "") {
 							$sql .= " bk.subledger_account = '" . $object->code_compta . "'  ";
 						}
-						if (! empty($object->code_compta) && ! empty($object->code_compta_fournisseur)) {
+						if ($object->code_compta != "" && $object->code_compta_fournisseur != "") {
 							$sql .= " OR ";
 						}
-						if (! empty($object->code_compta_fournisseur)) {
+						if ($object->code_compta_fournisseur != "") {
 							$sql .= " bk.subledger_account = '" . $object->code_compta_fournisseur . "' ";
 						}
 						$sql .= ") ";
@@ -159,13 +159,13 @@ class Lettering extends BookKeeping
 					$sql .= " AND bk.code_journal IN (SELECT code FROM " . MAIN_DB_PREFIX . "accounting_journal WHERE nature=4 AND entity=".$conf->entity.") ";
 					$sql .= " AND fac.entity IN (".getEntity('invoice', 0).")";// We don't share object for accountancy
 					$sql .= " AND ( ";
-					if (! empty($object->code_compta)) {
+					if ($object->code_compta != "") {
 						$sql .= "  bk.subledger_account = '" . $object->code_compta . "'  ";
 					}
-					if (! empty($object->code_compta) && ! empty($object->code_compta_fournisseur)) {
+					if ($object->code_compta != "" && $object->code_compta_fournisseur != "") {
 						$sql .= "  OR  ";
 					}
-					if (! empty($object->code_compta_fournisseur)) {
+					if ($object->code_compta_fournisseur != "") {
 						$sql .= "   bk.subledger_account = '" . $object->code_compta_fournisseur . "' ";
 					}
 					$sql .= " )  ";
@@ -187,13 +187,13 @@ class Lettering extends BookKeeping
 						$sql .= " WHERE code_journal IN (SELECT code FROM " . MAIN_DB_PREFIX . "accounting_journal WHERE nature=2 AND entity=".$conf->entity.") ";
 						$sql .= " AND fac.entity IN (".getEntity('invoice', 0).")";// We don't share object for accountancy
 						$sql .= " AND ( ";
-						if (! empty($object->code_compta)) {
+						if ($object->code_compta != "") {
 							$sql .= "  bk.subledger_account = '" . $object->code_compta . "'  ";
 						}
-						if (! empty($object->code_compta) && ! empty($object->code_compta_fournisseur)) {
+						if ($object->code_compta != "" && $object->code_compta_fournisseur != "") {
 							$sql .= "  OR  ";
 						}
-						if (! empty($object->code_compta_fournisseur)) {
+						if ($object->code_compta_fournisseur != "") {
 							$sql .= "   bk.subledger_account = '" . $object->code_compta_fournisseur . "' ";
 						}
 						$sql .= " )  ";
diff --git a/htdocs/accountancy/journal/bankjournal.php b/htdocs/accountancy/journal/bankjournal.php
index e4e07831b44..0f22789d630 100644
--- a/htdocs/accountancy/journal/bankjournal.php
+++ b/htdocs/accountancy/journal/bankjournal.php
@@ -171,8 +171,8 @@ if ($result) {
 	//print $sql;
 
 	// Variables
-	$account_supplier			= (! empty($conf->global->ACCOUNTING_ACCOUNT_SUPPLIER) ? $conf->global->ACCOUNTING_ACCOUNT_SUPPLIER : 'NotDefined');	// NotDefined is a reserved word
-	$account_customer			= (! empty($conf->global->ACCOUNTING_ACCOUNT_CUSTOMER) ? $conf->global->ACCOUNTING_ACCOUNT_CUSTOMER : 'NotDefined');	// NotDefined is a reserved word
+	$account_supplier			= (($conf->global->ACCOUNTING_ACCOUNT_SUPPLIER != "") ? $conf->global->ACCOUNTING_ACCOUNT_SUPPLIER : 'NotDefined');	// NotDefined is a reserved word
+	$account_customer			= ($conf->global->ACCOUNTING_ACCOUNT_CUSTOMER != "") ? $conf->global->ACCOUNTING_ACCOUNT_CUSTOMER : 'NotDefined');	// NotDefined is a reserved word
 	$account_employee			= (! empty($conf->global->SALARIES_ACCOUNTING_ACCOUNT_PAYMENT) ? $conf->global->SALARIES_ACCOUNTING_ACCOUNT_PAYMENT : 'NotDefined');	// NotDefined is a reserved word
 	$account_pay_vat			= (! empty($conf->global->ACCOUNTING_VAT_PAY_ACCOUNT) ? $conf->global->ACCOUNTING_VAT_PAY_ACCOUNT : 'NotDefined');	// NotDefined is a reserved word
 	$account_pay_donation		= (! empty($conf->global->DONATION_ACCOUNTINGACCOUNT) ? $conf->global->DONATION_ACCOUNTINGACCOUNT : 'NotDefined');	// NotDefined is a reserved word
@@ -218,7 +218,7 @@ if ($result) {
 		// Set accountancy code for thirdparty
 		$compta_soc = 'NotDefined';
 		if ($lineisapurchase > 0)
-			$compta_soc = (! empty($obj->code_compta_fournisseur) ? $obj->code_compta_fournisseur : $account_supplier);
+			$compta_soc = (($obj->code_compta_fournisseur != "") ? $obj->code_compta_fournisseur : $account_supplier);
 		if ($lineisasale > 0)
 			$compta_soc = (! empty($obj->code_compta) ? $obj->code_compta : $account_customer);
 
@@ -938,8 +938,8 @@ if (empty($action) || $action == 'view') {
 
 
 	// Button to write into Ledger
-	if (empty($conf->global->ACCOUNTING_ACCOUNT_CUSTOMER) || $conf->global->ACCOUNTING_ACCOUNT_CUSTOMER == '-1'
-		|| empty($conf->global->ACCOUNTING_ACCOUNT_SUPPLIER) || $conf->global->ACCOUNTING_ACCOUNT_SUPPLIER == '-1'
+	if (($conf->global->ACCOUNTING_ACCOUNT_CUSTOMER == "") || $conf->global->ACCOUNTING_ACCOUNT_CUSTOMER == '-1'
+		|| ($conf->global->ACCOUNTING_ACCOUNT_SUPPLIER == "") || $conf->global->ACCOUNTING_ACCOUNT_SUPPLIER == '-1'
 		|| empty($conf->global->SALARIES_ACCOUNTING_ACCOUNT_PAYMENT) || $conf->global->SALARIES_ACCOUNTING_ACCOUNT_PAYMENT == '-1') {
 		print '<br>'.img_warning().' '.$langs->trans("SomeMandatoryStepsOfSetupWereNotDone");
 		print ' : '.$langs->trans("AccountancyAreaDescMisc", 4, '<strong>'.$langs->transnoentitiesnoconv("MenuAccountancy").'-'.$langs->transnoentitiesnoconv("MenuAccountancy").'-'.$langs->transnoentitiesnoconv("Setup")."-".$langs->transnoentitiesnoconv("MenuDefaultAccounts").'</strong>');
@@ -950,8 +950,8 @@ if (empty($action) || $action == 'view') {
 
 	if (! empty($conf->global->ACCOUNTING_ENABLE_EXPORT_DRAFT_JOURNAL)) print '<input type="button" class="butAction" name="exportcsv" value="' . $langs->trans("ExportDraftJournal") . '" onclick="launch_export();" />';
 
-	if (empty($conf->global->ACCOUNTING_ACCOUNT_CUSTOMER) || $conf->global->ACCOUNTING_ACCOUNT_CUSTOMER == '-1'
-	    || empty($conf->global->ACCOUNTING_ACCOUNT_SUPPLIER) || $conf->global->ACCOUNTING_ACCOUNT_SUPPLIER == '-1') {
+	if (($conf->global->ACCOUNTING_ACCOUNT_CUSTOMER == "") || $conf->global->ACCOUNTING_ACCOUNT_CUSTOMER == '-1'
+	    || ($conf->global->ACCOUNTING_ACCOUNT_SUPPLIER == "") || $conf->global->ACCOUNTING_ACCOUNT_SUPPLIER == '-1') {
 	   print '<input type="button" class="butActionRefused classfortooltip" title="'.dol_escape_htmltag($langs->trans("SomeMandatoryStepsOfSetupWereNotDone")).'" value="' . $langs->trans("WriteBookKeeping") . '" />';
 	}
 	else {
diff --git a/htdocs/accountancy/journal/expensereportsjournal.php b/htdocs/accountancy/journal/expensereportsjournal.php
index 4c50015a2ba..d82381533cf 100644
--- a/htdocs/accountancy/journal/expensereportsjournal.php
+++ b/htdocs/accountancy/journal/expensereportsjournal.php
@@ -444,10 +444,10 @@ if ($action == 'exportcsv') {		// ISO and not UTF8 !
 
 	foreach ($taber as $key => $val) {
 	  $date = dol_print_date($val["date"], 'day');
-	  
+
 	  $userstatic->id = $tabuser[$key]['id'];
 	  $userstatic->name = $tabuser[$key]['name'];
-	  
+
 	  // Fees
 	  foreach ($tabht[$key] as $k => $mt) {
 	    $accountingaccount = new AccountingAccount($db);
@@ -474,7 +474,7 @@ if ($action == 'exportcsv') {		// ISO and not UTF8 !
 	      print "\n";
 	    }
 	  }
-	  
+
 	  // Third party
 	  foreach ($tabttc[$key] as $k => $mt) {
 	    print '"' . $date . '"' . $sep;
@@ -585,7 +585,7 @@ if (empty($action) || $action == 'view') {
 				// Account
 				print "<td>";
 				$accountoshow = length_accountg($k);
-				if (empty($accountoshow) || $accountoshow == 'NotDefined')
+				if (($accountoshow == "") || $accountoshow == 'NotDefined')
 				{
 					print '<span class="error">'.$langs->trans("FeeAccountNotDefined").'</span>';
 				}
@@ -615,7 +615,7 @@ if (empty($action) || $action == 'view') {
 			// Account
 			print "<td>";
 			$accountoshow = length_accounta($conf->global->SALARIES_ACCOUNTING_ACCOUNT_PAYMENT);
-			if (empty($accountoshow) || $accountoshow == 'NotDefined')
+			if (($accountoshow == "") || $accountoshow == 'NotDefined')
 			{
 				print '<span class="error">'.$langs->trans("MainAccountForUsersNotDefined").'</span>';
 			}
@@ -624,7 +624,7 @@ if (empty($action) || $action == 'view') {
 			// Subledger account
 			print "<td>";
 			$accountoshow = length_accounta($k);
-			if (empty($accountoshow) || $accountoshow == 'NotDefined')
+			if (($accountoshow == "") || $accountoshow == 'NotDefined')
 			{
 				print '<span class="error">'.$langs->trans("UserAccountNotDefined").'</span>';
 			}
@@ -652,7 +652,7 @@ if (empty($action) || $action == 'view') {
 				// Account
 				print "<td>";
 				$accountoshow = length_accountg($k);
-				if (empty($accountoshow) || $accountoshow == 'NotDefined')
+				if (($accountoshow == "") || $accountoshow == 'NotDefined')
 				{
 					print '<span class="error">'.$langs->trans("VATAccountNotDefined").'</span>';
 				}
diff --git a/htdocs/accountancy/journal/purchasesjournal.php b/htdocs/accountancy/journal/purchasesjournal.php
index cab5069e1f8..cd82e9f2f27 100644
--- a/htdocs/accountancy/journal/purchasesjournal.php
+++ b/htdocs/accountancy/journal/purchasesjournal.php
@@ -749,7 +749,7 @@ if (empty($action) || $action == 'view') {
 	}
 	print '<div class="tabsAction tabsActionNoBottom">';
 	if (! empty($conf->global->ACCOUNTING_ENABLE_EXPORT_DRAFT_JOURNAL)) print '<input type="button" class="butAction" name="exportcsv" value="' . $langs->trans("ExportDraftJournal") . '" onclick="launch_export();" />';
-	if (empty($conf->global->ACCOUNTING_ACCOUNT_SUPPLIER) || $conf->global->ACCOUNTING_ACCOUNT_SUPPLIER == '-1') {
+	if (($conf->global->ACCOUNTING_ACCOUNT_SUPPLIER == "") || $conf->global->ACCOUNTING_ACCOUNT_SUPPLIER == '-1') {
 		print '<input type="button" class="butActionRefused classfortooltip" title="'.dol_escape_htmltag($langs->trans("SomeMandatoryStepsOfSetupWereNotDone")).'" value="' . $langs->trans("WriteBookKeeping") . '" />';
 	}
 	else {
diff --git a/htdocs/accountancy/journal/sellsjournal.php b/htdocs/accountancy/journal/sellsjournal.php
index 8f82fd95afb..3b0607d34a7 100644
--- a/htdocs/accountancy/journal/sellsjournal.php
+++ b/htdocs/accountancy/journal/sellsjournal.php
@@ -146,7 +146,7 @@ if ($result) {
 	$num = $db->num_rows($result);
 
 	// Variables
-	$cptcli = (! empty($conf->global->ACCOUNTING_ACCOUNT_CUSTOMER)) ? $conf->global->ACCOUNTING_ACCOUNT_CUSTOMER : 'NotDefined';
+	$cptcli = (($conf->global->ACCOUNTING_ACCOUNT_CUSTOMER != "")) ? $conf->global->ACCOUNTING_ACCOUNT_CUSTOMER : 'NotDefined';
 	$cpttva = (! empty($conf->global->ACCOUNTING_VAT_SOLD_ACCOUNT)) ? $conf->global->ACCOUNTING_VAT_SOLD_ACCOUNT : 'NotDefined';
 
 	$i = 0;
@@ -679,14 +679,14 @@ if (empty($action) || $action == 'view') {
 	journalHead($nom, $nomlink, $period, $periodlink, $description, $builddate, $exportlink, array('action' => ''), '', $varlink);
 
 	// Button to write into Ledger
-	if (empty($conf->global->ACCOUNTING_ACCOUNT_CUSTOMER) || $conf->global->ACCOUNTING_ACCOUNT_CUSTOMER == '-1') {
+	if (($conf->global->ACCOUNTING_ACCOUNT_CUSTOMER == "") || $conf->global->ACCOUNTING_ACCOUNT_CUSTOMER == '-1') {
 		print '<br>';
 		print img_warning().' '.$langs->trans("SomeMandatoryStepsOfSetupWereNotDone");
 		print ' : '.$langs->trans("AccountancyAreaDescMisc", 4, '<strong>'.$langs->transnoentitiesnoconv("MenuAccountancy").'-'.$langs->transnoentitiesnoconv("MenuAccountancy").'-'.$langs->transnoentitiesnoconv("Setup")."-".$langs->transnoentitiesnoconv("MenuDefaultAccounts").'</strong>');
 	}
 	print '<div class="tabsAction tabsActionNoBottom">';
 	if (! empty($conf->global->ACCOUNTING_ENABLE_EXPORT_DRAFT_JOURNAL)) print '<input type="button" class="butAction" name="exportcsv" value="' . $langs->trans("ExportDraftJournal") . '" onclick="launch_export();" />';
-	if (empty($conf->global->ACCOUNTING_ACCOUNT_CUSTOMER) || $conf->global->ACCOUNTING_ACCOUNT_CUSTOMER == '-1') {
+	if (($conf->global->ACCOUNTING_ACCOUNT_CUSTOMER == "") || $conf->global->ACCOUNTING_ACCOUNT_CUSTOMER == '-1') {
 		print '<input type="button" class="butActionRefused classfortooltip" title="'.dol_escape_htmltag($langs->trans("SomeMandatoryStepsOfSetupWereNotDone")).'" value="' . $langs->trans("WriteBookKeeping") . '" />';
 	}
 	else {
@@ -813,7 +813,7 @@ if (empty($action) || $action == 'view') {
 				// Account
 				print "<td>";
 				$accountoshow = length_accounta($conf->global->ACCOUNTING_ACCOUNT_CUSTOMER);
-				if (empty($accountoshow) || $accountoshow == 'NotDefined')
+				if (($accountoshow == "") || $accountoshow == 'NotDefined')
 				{
 					print '<span class="error">'.$langs->trans("MainAccountForCustomersNotDefined").'</span>';
 				}
@@ -822,7 +822,7 @@ if (empty($action) || $action == 'view') {
 				// Subledger account
 				print "<td>";
 				$accountoshow = length_accounta($k);
-				if (empty($accountoshow) || $accountoshow == 'NotDefined')
+				if (($accountoshow == "") || $accountoshow == 'NotDefined')
 				{
 					print '<span class="error">'.$langs->trans("ThirdpartyAccountNotDefined").'</span>';
 				}
@@ -849,7 +849,7 @@ if (empty($action) || $action == 'view') {
 				// Account
 				print "<td>";
 				$accountoshow = length_accountg($k);
-				if (empty($accountoshow) || $accountoshow == 'NotDefined')
+				if (($accountoshow == "") || $accountoshow == 'NotDefined')
 				{
 					print '<span class="error">'.$langs->trans("ProductNotDefined").'</span>';
 				}
@@ -884,7 +884,7 @@ if (empty($action) || $action == 'view') {
 					// Account
 					print "<td>";
 					$accountoshow = length_accountg($k);
-					if (empty($accountoshow) || $accountoshow == 'NotDefined')
+					if (($accountoshow == "") || $accountoshow == 'NotDefined')
 					{
 						print '<span class="error">'.$langs->trans("VATAccountNotDefined").' ('.$langs->trans("Sale").')'.'</span>';
 					}
diff --git a/htdocs/compta/journal/purchasesjournal.php b/htdocs/compta/journal/purchasesjournal.php
index cd3bf06f43a..5b4e54fd807 100644
--- a/htdocs/compta/journal/purchasesjournal.php
+++ b/htdocs/compta/journal/purchasesjournal.php
@@ -123,7 +123,7 @@ if ($result)
 {
 	$num = $db->num_rows($result);
 	// les variables
-	$cptfour = (! empty($conf->global->ACCOUNTING_ACCOUNT_SUPPLIER)?$conf->global->ACCOUNTING_ACCOUNT_SUPPLIER:$langs->trans("CodeNotDef"));
+	$cptfour = (($conf->global->ACCOUNTING_ACCOUNT_SUPPLIER != "")?$conf->global->ACCOUNTING_ACCOUNT_SUPPLIER:$langs->trans("CodeNotDef"));
 	$cpttva = (! empty($conf->global->ACCOUNTING_VAT_BUY_ACCOUNT)?$conf->global->ACCOUNTING_VAT_BUY_ACCOUNT:$langs->trans("CodeNotDef"));
 
 	$tabfac = array();
@@ -139,7 +139,7 @@ if ($result)
 	{
 		$obj = $db->fetch_object($result);
 		// contrôles
-		$compta_soc = (! empty($obj->code_compta_fournisseur)?$obj->code_compta_fournisseur:$cptfour);
+		$compta_soc = (($obj->code_compta_fournisseur != "")?$obj->code_compta_fournisseur:$cptfour);
 		$compta_prod = $obj->accountancy_code_buy;
 		if (empty($compta_prod))
 		{
diff --git a/htdocs/compta/journal/sellsjournal.php b/htdocs/compta/journal/sellsjournal.php
index fe51665163e..123bb3c7770 100644
--- a/htdocs/compta/journal/sellsjournal.php
+++ b/htdocs/compta/journal/sellsjournal.php
@@ -146,7 +146,7 @@ if ($result)
    	{
    	    $obj = $db->fetch_object($result);
    	    // les variables
-   	    $cptcli = (! empty($conf->global->ACCOUNTING_ACCOUNT_CUSTOMER)?$conf->global->ACCOUNTING_ACCOUNT_CUSTOMER:$langs->trans("CodeNotDef"));
+   	    $cptcli = (($conf->global->ACCOUNTING_ACCOUNT_CUSTOMER != "")?$conf->global->ACCOUNTING_ACCOUNT_CUSTOMER:$langs->trans("CodeNotDef"));
    	    $compta_soc = (! empty($obj->code_compta)?$obj->code_compta:$cptcli);
 		$compta_prod = $obj->accountancy_code_sell;
 		if (empty($compta_prod))
diff --git a/htdocs/core/class/html.formaccounting.class.php b/htdocs/core/class/html.formaccounting.class.php
index 87b32902684..cf95e471ddd 100644
--- a/htdocs/core/class/html.formaccounting.class.php
+++ b/htdocs/core/class/html.formaccounting.class.php
@@ -392,7 +392,7 @@ class FormAccounting extends Form
 		$resql = $this->db->query($sql);
 		if ($resql) {
 			while ($obj = $this->db->fetch_object($resql)) {
-				if (!empty($obj->code_compta_fournisseur)) {
+				if ($obj->code_compta_fournisseur != "") {
 					$aux_account[$obj->code_compta_fournisseur] = $obj->code_compta_fournisseur.' ('.$obj->nom.')';
 				}
 			}
diff --git a/htdocs/core/lib/accounting.lib.php b/htdocs/core/lib/accounting.lib.php
index 889d9da8a2c..4b5345da62b 100644
--- a/htdocs/core/lib/accounting.lib.php
+++ b/htdocs/core/lib/accounting.lib.php
@@ -2,6 +2,7 @@
 /* Copyright (C) 2013-2014 Olivier Geffroy      <jeff@jeffinfo.com>
  * Copyright (C) 2013-2017 Alexandre Spangaro   <aspangaro@open-dsi.fr>
  * Copyright (C) 2014      Florian Henry        <florian.henry@open-concept.pro>
+ * Copyright (C) 2019      Eric Seigne         <eric.seigne@cap-rel.fr>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -23,6 +24,22 @@
  * 	\brief		Library of accountancy functions
  */
 
+ /**
+  *	Check if a value is empty with some options
+  *
+	*	@param	allow_false : setting this to true will make the function consider a boolean value of false as NOT empty. This parameter is false by default.
+	*	@param	allow_ws :    setting this to true will make the function consider a string with nothing but white space as NOT empty. This parameter is false by default.
+  *	@return	array				  Bool
+	* @author Michael - https://www.php.net/manual/fr/function.empty.php#90767
+  */
+	function is_empty($var, $allow_false = false, $allow_ws = false) {
+		if (!isset($var) || is_null($var) || ($allow_ws == false && trim($var) == "" && !is_bool($var)) || ($allow_false === false && is_bool($var) && $var === false) || (is_array($var) && empty($var))) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
 /**
  *	Prepare array with list of tabs
  *
@@ -75,12 +92,12 @@ function length_accountg($account)
 {
 	global $conf;
 
-	if ($account < 0 || empty($account)) return '';
+	if ($account < 0 || is_empty($account)) return '';
 
-	if (! empty($conf->global->ACCOUNTING_MANAGE_ZERO)) return $account;
+	if (! is_empty($conf->global->ACCOUNTING_MANAGE_ZERO)) return $account;
 
 	$g = $conf->global->ACCOUNTING_LENGTH_GACCOUNT;
-	if (! empty($g)) {
+	if (! is_empty($g)) {
 		// Clean parameters
 		$i = strlen($account);
 
@@ -110,12 +127,12 @@ function length_accounta($accounta)
 {
 	global $conf;
 
-	if ($accounta < 0 || empty($accounta)) return '';
+	if ($accounta < 0 || is_empty($accounta)) return '';
 
-	if (! empty($conf->global->ACCOUNTING_MANAGE_ZERO)) return $accounta;
+	if (! is_empty($conf->global->ACCOUNTING_MANAGE_ZERO)) return $accounta;
 
 	$a = $conf->global->ACCOUNTING_LENGTH_AACCOUNT;
-	if (! empty($a)) {
+	if (! is_empty($a)) {
 		// Clean parameters
 		$i = strlen($accounta);
 
@@ -158,7 +175,7 @@ function journalHead($nom, $variante, $period, $periodlink, $description, $build
 
     print "\n\n<!-- debut cartouche journal -->\n";
 
-    if(! empty($varlink)) $varlink = '?'.$varlink;
+    if(! is_empty($varlink)) $varlink = '?'.$varlink;
 
     $head=array();
     $h=0;
diff --git a/htdocs/core/modules/societe/mod_codecompta_panicum.php b/htdocs/core/modules/societe/mod_codecompta_panicum.php
index 4c5ffcd66c5..f3106cef761 100644
--- a/htdocs/core/modules/societe/mod_codecompta_panicum.php
+++ b/htdocs/core/modules/societe/mod_codecompta_panicum.php
@@ -96,8 +96,8 @@ class mod_codecompta_panicum extends ModeleAccountancyCode
 		$this->code='';
 
 		if (is_object($societe)) {
-			if ($type == 'supplier') $this->code = (! empty($societe->code_compta_fournisseur)?$societe->code_compta_fournisseur:'');
-			else $this->code = (! empty($societe->code_compta)?$societe->code_compta:'');
+			if ($type == 'supplier') $this->code = (($societe->code_compta_fournisseur != "")?$societe->code_compta_fournisseur:'');
+			else $this->code = (($societe->code_compta != "")?$societe->code_compta:'');
 		}
 
 		return 0; // return ok
diff --git a/htdocs/societe/class/societe.class.php b/htdocs/societe/class/societe.class.php
index 84bda8abd54..ce7617f003d 100644
--- a/htdocs/societe/class/societe.class.php
+++ b/htdocs/societe/class/societe.class.php
@@ -928,7 +928,7 @@ class Societe extends CommonObject
 		if (! empty($allowmodcodefournisseur) && ! empty($this->fournisseur))
 		{
 			// Attention get_codecompta peut modifier le code suivant le module utilise
-			if (empty($this->code_compta_fournisseur))
+			if ($this->code_compta_fournisseur == "")
 			{
 				$ret=$this->get_codecompta('supplier');
 				if ($ret < 0) return -1;
@@ -1085,7 +1085,7 @@ class Societe extends CommonObject
 			if ($supplier)
 			{
 				$sql .= ", code_fournisseur = ".(! empty($this->code_fournisseur)?"'".$this->db->escape($this->code_fournisseur)."'":"null");
-				$sql .= ", code_compta_fournisseur = ".(! empty($this->code_compta_fournisseur)?"'".$this->db->escape($this->code_compta_fournisseur)."'":"null");
+				$sql .= ", code_compta_fournisseur = ".(($this->code_compta_fournisseur != "")?"'".$this->db->escape($this->code_compta_fournisseur)."'":"null");
 			}
 			$sql .= ", fk_user_modif = ".($user->id > 0 ? $user->id:"null");
 			$sql .= ", fk_multicurrency = ".(int) $this->fk_multicurrency;