diff --git a/htdocs/core/class/conf.class.php b/htdocs/core/class/conf.class.php
index 4ca4aff34e9..c0d6d3883cb 100644
--- a/htdocs/core/class/conf.class.php
+++ b/htdocs/core/class/conf.class.php
@@ -91,6 +91,9 @@ class Conf
         $this->mycompany=(object) array();
         $this->admin=(object) array();
         $this->user=(object) array();
+        $this->syslog=(object) array();
+        $this->browser=(object) array();
+        $this->multicompany=(object) array();
 	    //! Charset for HTML output and for storing data in memory
 	    $this->file->character_set_client='UTF-8';   // UTF-8, ISO-8859-1
 	}
@@ -250,21 +253,29 @@ class Conf
 		// for backward compatibility.
 
 		// Sous module bons d'expedition
-		$this->expedition_bon->enabled=defined("MAIN_SUBMODULE_EXPEDITION")?MAIN_SUBMODULE_EXPEDITION:0;
+		$this->expedition_bon = (object) array();
+		$this->expedition_bon->enabled= defined("MAIN_SUBMODULE_EXPEDITION")?MAIN_SUBMODULE_EXPEDITION:0;
 		// Sous module bons de livraison
+		$this->livraison_bon = (object) array();
 		$this->livraison_bon->enabled=defined("MAIN_SUBMODULE_LIVRAISON")?MAIN_SUBMODULE_LIVRAISON:0;
 
 		// Module fournisseur
+		$this->fournisseur = (object) array();
+		$this->fournisseur->commande = (object) array();
 		$this->fournisseur->commande->dir_output=$rootfordata."/fournisseur/commande";
 		$this->fournisseur->commande->dir_temp  =$rootfordata."/fournisseur/commande/temp";
+		$this->fournisseur->facture = (object) array();
 		$this->fournisseur->facture->dir_output =$rootfordata."/fournisseur/facture";
 		$this->fournisseur->facture->dir_temp   =$rootfordata."/fournisseur/facture/temp";
 		// Module product/service
+		$this->product = (object) array();
 		$this->product->dir_output=$rootfordata."/produit";
 		$this->product->dir_temp  =$rootfordata."/produit/temp";
+		$this->service = (object) array();
 		$this->service->dir_output=$rootfordata."/produit";
 		$this->service->dir_temp  =$rootfordata."/produit/temp";
 		// Module contrat
+		$this->contrat = (object) array();
 		$this->contrat->dir_output=$rootfordata."/contracts";
 		$this->contrat->dir_temp  =$rootfordata."/contracts/temp";
 
@@ -311,10 +322,12 @@ class Conf
 		if (! empty($this->global->MAIN_MAIL_EMAIL_FROM)) $this->email_from = $this->global->MAIN_MAIL_EMAIL_FROM;
 
 		// conf->notification->email_from = email pour envoi par Dolibarr des notifications
+		$this->notification = (object) array();
 		$this->notification->email_from=$this->email_from;
 		if (! empty($this->global->NOTIFICATION_EMAIL_FROM)) $this->notification->email_from=$this->global->NOTIFICATION_EMAIL_FROM;
 
 		// conf->mailing->email_from = email pour envoi par Dolibarr des mailings
+		$this->mailing = (object) array();
 		$this->mailing->email_from=$this->email_from;
 		if (! empty($this->global->MAILING_EMAIL_FROM))	$this->mailing->email_from=$this->global->MAILING_EMAIL_FROM;
 
@@ -345,17 +358,36 @@ class Conf
         if (empty($this->global->TAX_MODE_BUY_SERVICE))  $this->global->TAX_MODE_BUY_SERVICE='payment';
 
 		// Delay before warnings
+        $this->actions = (object) array();
 		$this->actions->warning_delay=(isset($this->global->MAIN_DELAY_ACTIONS_TODO)?$this->global->MAIN_DELAY_ACTIONS_TODO:7)*24*60*60;
+		$this->commande = (object) array();
+		$this->commande->client = (object) array();
 		$this->commande->client->warning_delay=(isset($this->global->MAIN_DELAY_ORDERS_TO_PROCESS)?$this->global->MAIN_DELAY_ORDERS_TO_PROCESS:2)*24*60*60;
-        $this->commande->fournisseur->warning_delay=(isset($this->global->MAIN_DELAY_SUPPLIER_ORDERS_TO_PROCESS)?$this->global->MAIN_DELAY_SUPPLIER_ORDERS_TO_PROCESS:7)*24*60*60;
-		$this->propal->cloture->warning_delay=(isset($this->global->MAIN_DELAY_PROPALS_TO_CLOSE)?$this->global->MAIN_DELAY_PROPALS_TO_CLOSE:0)*24*60*60;
-		$this->propal->facturation->warning_delay=(isset($this->global->MAIN_DELAY_PROPALS_TO_BILL)?$this->global->MAIN_DELAY_PROPALS_TO_BILL:0)*24*60*60;
+		$this->commande->fournisseur = (object) array();
+		$this->commande->fournisseur->warning_delay=(isset($this->global->MAIN_DELAY_SUPPLIER_ORDERS_TO_PROCESS)?$this->global->MAIN_DELAY_SUPPLIER_ORDERS_TO_PROCESS:7)*24*60*60;
+        $this->propal = (object) array();
+        $this->propal->cloture = (object) array();
+        $this->propal->cloture->warning_delay=(isset($this->global->MAIN_DELAY_PROPALS_TO_CLOSE)?$this->global->MAIN_DELAY_PROPALS_TO_CLOSE:0)*24*60*60;
+        $this->propal->facturation = (object) array();
+        $this->propal->facturation->warning_delay=(isset($this->global->MAIN_DELAY_PROPALS_TO_BILL)?$this->global->MAIN_DELAY_PROPALS_TO_BILL:0)*24*60*60;
+		$this->facture = (object) array();
+		$this->facture->client = (object) array();
 		$this->facture->client->warning_delay=(isset($this->global->MAIN_DELAY_CUSTOMER_BILLS_UNPAYED)?$this->global->MAIN_DELAY_CUSTOMER_BILLS_UNPAYED:0)*24*60*60;
-        $this->facture->fournisseur->warning_delay=(isset($this->global->MAIN_DELAY_SUPPLIER_BILLS_TO_PAY)?$this->global->MAIN_DELAY_SUPPLIER_BILLS_TO_PAY:0)*24*60*60;
-		$this->contrat->services->inactifs->warning_delay=(isset($this->global->MAIN_DELAY_NOT_ACTIVATED_SERVICES)?$this->global->MAIN_DELAY_NOT_ACTIVATED_SERVICES:0)*24*60*60;
-		$this->contrat->services->expires->warning_delay=(isset($this->global->MAIN_DELAY_RUNNING_SERVICES)?$this->global->MAIN_DELAY_RUNNING_SERVICES:0)*24*60*60;
+		$this->facture->fournisseur = (object) array();
+		$this->facture->fournisseur->warning_delay=(isset($this->global->MAIN_DELAY_SUPPLIER_BILLS_TO_PAY)?$this->global->MAIN_DELAY_SUPPLIER_BILLS_TO_PAY:0)*24*60*60;
+        $this->contrat = (object) array();
+        $this->contrat->services = (object) array();
+        $this->contrat->services->inactifs = (object) array();
+        $this->contrat->services->inactifs->warning_delay=(isset($this->global->MAIN_DELAY_NOT_ACTIVATED_SERVICES)?$this->global->MAIN_DELAY_NOT_ACTIVATED_SERVICES:0)*24*60*60;
+        $this->contrat->services->expires = (object) array();
+        $this->contrat->services->expires->warning_delay=(isset($this->global->MAIN_DELAY_RUNNING_SERVICES)?$this->global->MAIN_DELAY_RUNNING_SERVICES:0)*24*60*60;
+		$this->adherent = (object) array();
+		$this->adherent->cotisation = (object) array();
 		$this->adherent->cotisation->warning_delay=(isset($this->global->MAIN_DELAY_MEMBERS)?$this->global->MAIN_DELAY_MEMBERS:0)*24*60*60;
+		$this->bank = (object) array();
+		$this->bank->rappro = (object) array();
 		$this->bank->rappro->warning_delay=(isset($this->global->MAIN_DELAY_TRANSACTIONS_TO_CONCILIATE)?$this->global->MAIN_DELAY_TRANSACTIONS_TO_CONCILIATE:0)*24*60*60;
+		$this->bank->cheque = (object) array();
 		$this->bank->cheque->warning_delay=(isset($this->global->MAIN_DELAY_CHEQUES_TO_DEPOSIT)?$this->global->MAIN_DELAY_CHEQUES_TO_DEPOSIT:0)*24*60*60;
 
 		// For backward compatibility
diff --git a/htdocs/core/db/mysqli.class.php b/htdocs/core/db/mysqli.class.php
index 55cf0168bf4..ed3bf3c6268 100644
--- a/htdocs/core/db/mysqli.class.php
+++ b/htdocs/core/db/mysqli.class.php
@@ -83,9 +83,10 @@ class DoliDBMysqli
     function DoliDBMysqli($type, $host, $user, $pass, $name='', $port=0)
     {
         global $conf,$langs;
-
-        if (! empty($conf->db->character_set)) $this->forcecharset=$conf->db->character_set;
-        if (! empty($conf->db->dolibarr_main_db_collation)) $this->forcecollate=$conf->db->dolibarr_main_db_collation;
+        
+        // TODO error in strict mode (static property for "$forcecharset" and "$forcecollate")
+        //if (! empty($conf->db->character_set)) $this->forcecharset=$conf->db->character_set;
+        //if (! empty($conf->db->dolibarr_main_db_collation)) $this->forcecollate=$conf->db->dolibarr_main_db_collation;
 
         $this->database_user=$user;
 
@@ -142,7 +143,7 @@ class DoliDBMysqli
                 $clientmustbe='';
                 if (preg_match('/UTF-8/i',$conf->file->character_set_client))      $clientmustbe='utf8';
                 if (preg_match('/ISO-8859-1/i',$conf->file->character_set_client)) $clientmustbe='latin1';
-                if (mysqli_client_encoding($this->db) != $clientmustbe)
+                if (mysqli_character_set_name($this->db) != $clientmustbe)
                 {
                     $this->query("SET NAMES '".$clientmustbe."'", $this->db);
                     //$this->query("SET CHARACTER SET ". $this->forcecharset);
@@ -168,7 +169,7 @@ class DoliDBMysqli
                 $clientmustbe='';
                 if (preg_match('/UTF-8/i',$conf->file->character_set_client))      $clientmustbe='utf8';
                 if (preg_match('/ISO-8859-1/i',$conf->file->character_set_client)) $clientmustbe='latin1';
-                if (mysqli_client_encoding($this->db) != $clientmustbe)
+                if (mysqli_character_set_name($this->db) != $clientmustbe)
                 {
                     $this->query("SET NAMES '".$clientmustbe."'", $this->db);
                     //$this->query("SET CHARACTER SET ". $this->forcecharset);
diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 59d6adf5771..5bdbc3ad554 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -1101,8 +1101,8 @@ function dol_mktime($hour,$minute,$second,$month,$day,$year,$gm=false,$check=1)
 function dol_now($mode='gmt')
 {
     // Note that gmmktime and mktime return same value (GMT) whithout parameters
-    if ($mode == 'gmt') $ret=gmmktime();	// Time for now at greenwich.
-    else if ($mode == 'tzserver')			// Time for now with PHP server timezone added
+    if ($mode == 'gmt') $ret=time();	// Time for now at greenwich.
+    else if ($mode == 'tzserver')		// Time for now with PHP server timezone added
     {
         require_once(DOL_DOCUMENT_ROOT.'/core/lib/date.lib.php');
         $tzsecond=getServerTimeZoneInt();    // Contains tz+dayling saving time
diff --git a/htdocs/core/modules/DolibarrModules.class.php b/htdocs/core/modules/DolibarrModules.class.php
index 5d60c70c4e6..9fcb2a89f69 100644
--- a/htdocs/core/modules/DolibarrModules.class.php
+++ b/htdocs/core/modules/DolibarrModules.class.php
@@ -373,7 +373,7 @@ abstract class DolibarrModules
         $sql.= $this->numero;
         $sql.= ", ".$conf->entity;
         $sql.= ", 1";
-        $sql.= ", '".$this->db->idate(gmmktime())."'";
+        $sql.= ", '".$this->db->idate(dol_now())."'";
         $sql.= ", '".$this->version."'";
         $sql.= ")";
 
diff --git a/htdocs/install/etape1.php b/htdocs/install/etape1.php
index 96292a89b52..b57b0e8a1c3 100644
--- a/htdocs/install/etape1.php
+++ b/htdocs/install/etape1.php
@@ -236,8 +236,8 @@ if (! $error && $db->connected)
 {
     if (! empty($_POST["db_create_database"]))	// If we create database, we force default value
     {
-        $defaultCharacterSet=$db->forcecharset;
-        $defaultCollationConnection=$db->forcecollate;
+    	$defaultCharacterSet=getStaticMember(get_class($db),'forcecharset');
+    	$defaultCollationConnection=getStaticMember(get_class($db),'forcecollate');
     }
     else	// If already created, we take current value
     {
diff --git a/htdocs/install/inc.php b/htdocs/install/inc.php
index 8dd1b140d6c..3ee0e363d1a 100644
--- a/htdocs/install/inc.php
+++ b/htdocs/install/inc.php
@@ -43,6 +43,13 @@ require_once(ADODB_PATH.'adodb-time.inc.php');
 
 error_reporting(E_ALL);	// To have all errors without disabled E_STRICT
 
+// IMPORTANT with strict mode E_STRICT
+$conf = new stdClass(); // instantiate $conf explicitely
+$conf->global	= (object) array();
+$conf->file		= (object) array();
+$conf->db		= (object) array();
+$conf->syslog	= (object) array();
+
 // Define $_REQUEST["logtohtml"]
 $_REQUEST["logtohtml"]=1;
 
@@ -134,7 +141,7 @@ if (! defined('DONOTLOADCONF') && file_exists($conffile))
         $includeconferror='ErrorBadFormatForConfFile';
     }
 }
-$conf->global->MAIN_LOGTOHTML=1;
+$conf->global->MAIN_LOGTOHTML = 1;
 
 // Define prefix
 if (! isset($dolibarr_main_db_prefix) || ! $dolibarr_main_db_prefix) $dolibarr_main_db_prefix='llx_';
@@ -222,7 +229,7 @@ if (! defined('SYSLOG_FILE'))	// To avoid warning on systems with constant alrea
 if (! defined('SYSLOG_FILE_NO_ERROR')) define('SYSLOG_FILE_NO_ERROR',1);
 
 // Removed magic_quotes
-if (function_exists('get_magic_quotes_gpc'))	// magic_quotes_* removed in PHP6
+if (function_exists('get_magic_quotes_gpc'))	// magic_quotes_* removed in PHP 5.4
 {
     if (get_magic_quotes_gpc())
     {