diff --git a/htdocs/contrat/list.php b/htdocs/contrat/list.php
index 560b83175fb..03e65e18988 100644
--- a/htdocs/contrat/list.php
+++ b/htdocs/contrat/list.php
@@ -149,7 +149,9 @@ $reshook = $hookmanager->executeHooks('completeFieldsToSearchAll', $parameters,
 if ($reshook > 0) {
 	$fieldstosearchall = $hookmanager->resArray['fieldstosearchall'];
 } elseif ($reshook == 0) {
-	$fieldstosearchall = array_merge($fieldstosearchall, $hookmanager->resArray['fieldstosearchall']);
+	if (!empty($hookmanager->resArray['fieldstosearchall'])) {
+		$fieldstosearchall = array_merge($fieldstosearchall, $hookmanager->resArray['fieldstosearchall']);
+	}
 }
 
 $arrayfields = array(
diff --git a/htdocs/core/lib/company.lib.php b/htdocs/core/lib/company.lib.php
index c433f4d90db..a560f5e34f7 100644
--- a/htdocs/core/lib/company.lib.php
+++ b/htdocs/core/lib/company.lib.php
@@ -1121,8 +1121,11 @@ function show_contacts($conf, $langs, $db, $object, $backtopage = '', $showuserl
 	if ($search_note_private != '') {
 		$param .= '&search_note_private='.urlencode($search_note_private);
 	}
-	if ($search_birthday != '') {
-		$param .= '&search_birthday='.urlencode($search_birthday);
+	if ($search_birthday_dtstart != '') {
+		$param .= '&search_birthday_dtstart='.urlencode($search_birthday_dtstart);
+	}
+	if ($search_birthday_dtend != '') {
+		$param .= '&search_birthday_dtend='.urlencode($search_birthday_dtend);
 	}
 	if ($optioncss != '') {
 		$param .= '&optioncss='.urlencode($optioncss);
@@ -2233,10 +2236,10 @@ function addOtherFilterSQL(&$sql, $donetodo, $now, $filters)
 	} elseif ($donetodo == 'done') {
 		$sql .= " AND (a.percent = 100 OR (a.percent = -1 AND a.datep <= '".$db->idate($now)."'))";
 	}
-	if (is_array($filters) && $filters['search_agenda_label']) {
+	if (is_array($filters) && !empty($filters['search_agenda_label'])) {
 		$sql .= natural_search('a.label', $filters['search_agenda_label']);
 	}
-	if (is_array($filters) && $filters['search_rowid']) {
+	if (is_array($filters) && !empty($filters['search_rowid'])) {
 		$sql .= natural_search('a.id', $filters['search_rowid'], 1);
 	}
 
diff --git a/htdocs/core/tpl/card_presend.tpl.php b/htdocs/core/tpl/card_presend.tpl.php
index 2393524e572..48458c036b1 100644
--- a/htdocs/core/tpl/card_presend.tpl.php
+++ b/htdocs/core/tpl/card_presend.tpl.php
@@ -108,7 +108,7 @@ if ($action == 'presend') {
 				$fileparams = dol_most_recent_file($diroutput.'/'.$ref, preg_quote($ref, '/').'[^\-]+');
 			}
 
-			$file = $fileparams['fullname'];
+			$file = isset($fileparams['fullname'])?$fileparams['fullname']:null;
 		}
 	}
 
diff --git a/htdocs/fourn/class/fournisseur.facture.class.php b/htdocs/fourn/class/fournisseur.facture.class.php
index 2ae74dae103..34af6f4cbda 100644
--- a/htdocs/fourn/class/fournisseur.facture.class.php
+++ b/htdocs/fourn/class/fournisseur.facture.class.php
@@ -2740,7 +2740,7 @@ class FactureFournisseur extends CommonInvoice
 				$alreadypaid = $this->alreadypaid;
 			}
 
-			$$datas['picto'] .= ' '.$this->getLibStatut(5, $alreadypaid);
+			$datas['picto'] .= ' '.$this->getLibStatut(5, $alreadypaid);
 		}
 		if ($moretitle) {
 			$datas['picto'] .= ' - '.$moretitle;
diff --git a/htdocs/product/stock/class/entrepot.class.php b/htdocs/product/stock/class/entrepot.class.php
index a165bf79038..006eb353a6c 100644
--- a/htdocs/product/stock/class/entrepot.class.php
+++ b/htdocs/product/stock/class/entrepot.class.php
@@ -706,9 +706,9 @@ class Entrepot extends CommonObject
 		if (isset($this->statut)) {
 			$datas['picto'] .= ' '.$this->getLibStatut(5);
 		}
-		$datas['ref'] .= '<br><b>'.$langs->trans('Ref').':</b> '.(empty($this->ref) ? $this->label : $this->ref);
+		$datas['ref'] = '<br><b>'.$langs->trans('Ref').':</b> '.(empty($this->ref) ? $this->label : $this->ref);
 		if (!empty($this->lieu)) {
-			$datas['locationsummary'] .= '<br><b>'.$langs->trans('LocationSummary').':</b> '.$this->lieu;
+			$datas['locationsummary'] = '<br><b>'.$langs->trans('LocationSummary').':</b> '.$this->lieu;
 		}
 
 		return $datas;
diff --git a/htdocs/product/stock/replenish.php b/htdocs/product/stock/replenish.php
index 2520eb8f559..cf6d6b8352d 100644
--- a/htdocs/product/stock/replenish.php
+++ b/htdocs/product/stock/replenish.php
@@ -146,6 +146,7 @@ if (GETPOST('button_removefilter_x', 'alpha') || GETPOST('button_removefilter.x'
 	$includeproductswithoutdesiredqty = '';
 	$draftorder = '';
 }
+$draftchecked = "";
 if ($draftorder == 'on') {
 	$draftchecked = "checked";
 }
diff --git a/htdocs/projet/card.php b/htdocs/projet/card.php
index 3ae98980c1d..42d5404f3c9 100644
--- a/htdocs/projet/card.php
+++ b/htdocs/projet/card.php
@@ -52,6 +52,7 @@ $backtopagejsfields = GETPOST('backtopagejsfields', 'alpha');
 $cancel = GETPOST('cancel', 'alpha');
 $confirm = GETPOST('confirm', 'aZ09');
 
+$dol_openinpopup = 0;
 if (!empty($backtopagejsfields)) {
 	$tmpbacktopagejsfields = explode(':', $backtopagejsfields);
 	$dol_openinpopup = $tmpbacktopagejsfields[0];
diff --git a/htdocs/projet/list.php b/htdocs/projet/list.php
index ea2d27936b1..abb07d36480 100644
--- a/htdocs/projet/list.php
+++ b/htdocs/projet/list.php
@@ -1408,7 +1408,7 @@ while ($i < $imaxinloop) {
 	$object->opp_percent = $obj->opp_percent;
 	$object->opp_status = $obj->fk_opp_status;
 	$object->opp_status_code = $obj->opp_status_code;
-	$object->opp_amount = $obj->opp_ammount;
+	$object->opp_amount = !empty($obj->opp_ammount) ? $obj->opp_ammount : "";
 	$object->opp_weighted_amount = $obj->opp_weighted_amount;
 	$object->budget_amount = $obj->budget_amount;
 	$object->usage_opportunity = $obj->usage_opportunity;
@@ -1646,7 +1646,11 @@ while ($i < $imaxinloop) {
 			//if ($obj->opp_status_code)
 			if (strcmp($obj->opp_amount, '')) {
 				print '<span class="amount">'.price($obj->opp_amount, 1, $langs, 1, -1, -1, '').'</span>';
-				$totalarray['val']['p.opp_amount'] += $obj->opp_amount;
+				if (!isset($totalarray['val']['p.opp_amount'])) {
+					$totalarray['val']['p.opp_amount'] = $obj->opp_amount;
+				} else {
+					$totalarray['val']['p.opp_amount'] += $obj->opp_amount;
+				}
 			}
 			print '</td>';
 			if (!$i) {
@@ -1690,7 +1694,11 @@ while ($i < $imaxinloop) {
 			print '<td class="right">';
 			if ($obj->budget_amount != '') {
 				print '<span class="amount">'.price($obj->budget_amount, 1, $langs, 1, -1, -1).'</span>';
-				$totalarray['val']['p.budget_amount'] += $obj->budget_amount;
+				if (!isset($totalarray['val']['p.budget_amount'])) {
+					$totalarray['val']['p.budget_amount'] = $obj->budget_amount;
+				} else {
+					$totalarray['val']['p.budget_amount'] += $obj->budget_amount;
+				}
 			}
 			print '</td>';
 			if (!$i) {
diff --git a/htdocs/projet/tasks.php b/htdocs/projet/tasks.php
index ec10af0f884..e50855047d2 100644
--- a/htdocs/projet/tasks.php
+++ b/htdocs/projet/tasks.php
@@ -770,7 +770,7 @@ if ($action == 'create' && $user->rights->projet->creer && (empty($object->third
 	if (is_array($contactsofproject) && count($contactsofproject)) {
 		print $form->select_dolusers($user->id, 'userid', 0, '', 0, '', $contactsofproject, 0, 0, 0, '', 0, '', 'maxwidth300');
 	} else {
-		if ($projectid > 0 || $object->id > 0) {
+		if ((isset($projectid) && $projectid > 0) || $object->id > 0) {
 			print '<span class="opacitymedium">'.$langs->trans("NoUserAssignedToTheProject").'</span>';
 		} else {
 			print $form->select_dolusers($user->id, 'userid', 0, '', 0, '', '', 0, 0, 0, '', 0, '', 'maxwidth300');
@@ -805,6 +805,7 @@ if ($action == 'create' && $user->rights->projet->creer && (empty($object->third
 	// WYSIWYG editor
 	include_once DOL_DOCUMENT_ROOT.'/core/class/doleditor.class.php';
 	$cked_enabled = (!empty($conf->global->FCKEDITOR_ENABLE_SOCIETE) ? $conf->global->FCKEDITOR_ENABLE_SOCIETE : 0);
+	$nbrows = 0;
 	if (!empty($conf->global->MAIN_INPUT_DESC_HEIGHT)) {
 		$nbrows = $conf->global->MAIN_INPUT_DESC_HEIGHT;
 	}