diff --git a/htdocs/opensurvey/card.php b/htdocs/opensurvey/card.php
index b243b8c8342..36c5b2ea07d 100644
--- a/htdocs/opensurvey/card.php
+++ b/htdocs/opensurvey/card.php
@@ -209,7 +209,7 @@ $toutsujet = explode(",", $object->sujet);
 $listofanswers = array();
 foreach ($toutsujet as $value) {
 	$tmp = explode('@', $value);
-	$listofanswers[] = array('label'=>$tmp[0], 'format'=>($tmp[1] ? $tmp[1] : 'checkbox'));
+	$listofanswers[] = array('label'=>$tmp[0], 'format'=>(!empty($tmp[1]) ? $tmp[1] : 'checkbox'));
 }
 $toutsujet = str_replace("@", "<br>", $toutsujet);
 $toutsujet = str_replace("°", "'", $toutsujet);
diff --git a/htdocs/opensurvey/class/opensurveysondage.class.php b/htdocs/opensurvey/class/opensurveysondage.class.php
index b7fadbdb60d..8848af12629 100644
--- a/htdocs/opensurvey/class/opensurveysondage.class.php
+++ b/htdocs/opensurvey/class/opensurveysondage.class.php
@@ -274,7 +274,7 @@ class Opensurveysondage extends CommonObject
 				$this->sujet = $obj->sujet;
 				$this->fk_user_creat = $obj->fk_user_creat;
 
-				$this->date_m = $this->db->jdate($obj->tls);
+				$this->date_m = $this->db->jdate(!empty($obj->tls) ? $obj->tls : "");
 				$ret = 1;
 			} else {
 				$sondage = ($id ? 'id='.$id : 'sondageid='.$numsurvey);
@@ -686,7 +686,7 @@ class Opensurveysondage extends CommonObject
 	{
 		$result = 0;
 
-		$sql .= " SELECT COUNT(id_users) as nb FROM ".MAIN_DB_PREFIX."opensurvey_user_studs";
+		$sql = " SELECT COUNT(id_users) as nb FROM ".MAIN_DB_PREFIX."opensurvey_user_studs";
 		$sql .= " WHERE id_sondage = '".$this->db->escape($this->ref)."'";
 
 		$resql = $this->db->query($sql);
diff --git a/htdocs/opensurvey/exportcsv.php b/htdocs/opensurvey/exportcsv.php
index a7e8b709793..1e9005b6af4 100644
--- a/htdocs/opensurvey/exportcsv.php
+++ b/htdocs/opensurvey/exportcsv.php
@@ -63,9 +63,9 @@ $now = dol_now();
 
 $nbcolonnes = substr_count($object->sujet, ',') + 1;
 $toutsujet = explode(",", $object->sujet);
-
+$somme = array();
 // affichage des sujets du sondage
-$input .= $langs->trans("Name").";";
+$input = $langs->trans("Name").";";
 for ($i = 0; $toutsujet[$i]; $i++) {
 	if ($object->format == "D") {
 		$input .= ''.dol_print_date($toutsujet[$i], 'dayhour').';';
@@ -105,6 +105,9 @@ if ($resql) {
 		//affichage des resultats
 		$ensemblereponses = $obj->reponses;
 		for ($k = 0; $k < $nbcolonnes; $k++) {
+			if (empty($somme[$k])) {
+				$somme[$k] = 0;
+			}
 			$car = substr($ensemblereponses, $k, 1);
 			if ($car == "1") {
 				$input .= 'OK;';
diff --git a/htdocs/opensurvey/list.php b/htdocs/opensurvey/list.php
index e03ee278574..626499e2412 100644
--- a/htdocs/opensurvey/list.php
+++ b/htdocs/opensurvey/list.php
@@ -40,6 +40,7 @@ $toselect   = GETPOST('toselect', 'array'); // Array of ids of elements selected
 $contextpage = GETPOST('contextpage', 'aZ') ?GETPOST('contextpage', 'aZ') : 'opensurveylist'; // To manage different context of search
 $backtopage = GETPOST('backtopage', 'alpha'); // Go back to a dedicated page
 $optioncss  = GETPOST('optioncss', 'aZ'); // Option for the css output (always '' except when 'print')
+$sall = trim((GETPOST('search_all', 'alphanohtml') != '') ? GETPOST('search_all', 'alphanohtml') : GETPOST('sall', 'alphanohtml'));
 
 $id = GETPOST('id', 'alpha');
 $search_ref = GETPOST('search_ref', 'alpha');
@@ -175,16 +176,16 @@ $sql .= " WHERE p.entity IN (".getEntity('survey').")";
 if ($search_status != '-1' && $search_status != '') {
 	$sql .= natural_search("p.status", $search_status, 2);
 }
-if ($search_expired == 'expired') {
+if (!empty($search_expired) && $search_expired == 'expired') {
 	$sql .= " AND p.date_fin < '".$db->idate($now)."'";
 }
-if ($search_expired == 'opened') {
+if (!empty($search_expired) && $search_expired == 'opened') {
 	$sql .= " AND p.date_fin >= '".$db->idate($now)."'";
 }
-if ($search_ref) {
+if (!empty($search_ref)) {
 	$sql .= natural_search("p.id_sondage", $search_ref);
 }
-if ($search_title) {
+if (!empty($search_title)) {
 	$sql .= natural_search("p.titre", $search_title);
 }
 // Add where from extra fields
diff --git a/htdocs/opensurvey/results.php b/htdocs/opensurvey/results.php
index f8a2648a809..bedec1eb1aa 100644
--- a/htdocs/opensurvey/results.php
+++ b/htdocs/opensurvey/results.php
@@ -435,7 +435,7 @@ $toutsujet = explode(",", $object->sujet);
 $listofanswers = array();
 foreach ($toutsujet as $value) {
 	$tmp = explode('@', $value);
-	$listofanswers[] = array('label'=>$tmp[0], 'format'=>($tmp[1] ? $tmp[1] : 'checkbox'));
+	$listofanswers[] = array('label'=>$tmp[0], 'format'=>(!empty($tmp[1]) ? $tmp[1] : 'checkbox'));
 }
 $toutsujet = str_replace("@", "<br>", $toutsujet);
 $toutsujet = str_replace("°", "'", $toutsujet);
diff --git a/htdocs/public/opensurvey/studs.php b/htdocs/public/opensurvey/studs.php
index 900483bbbfa..b6708a5b5f6 100644
--- a/htdocs/public/opensurvey/studs.php
+++ b/htdocs/public/opensurvey/studs.php
@@ -319,7 +319,7 @@ $toutsujet = explode(",", $object->sujet);
 $listofanswers = array();
 foreach ($toutsujet as $value) {
 	$tmp = explode('@', $value);
-	$listofanswers[] = array('label'=>$tmp[0], 'format'=>($tmp[1] ? $tmp[1] : 'checkbox'));
+	$listofanswers[] = array('label'=>$tmp[0], 'format'=>(!empty($tmp[1]) ? $tmp[1] : 'checkbox'));
 }
 $toutsujet = str_replace("°", "'", $toutsujet);