diff --git a/htdocs/compta/paiement/class/paiement.class.php b/htdocs/compta/paiement/class/paiement.class.php
index 373fa2d5175..a473f06cd04 100644
--- a/htdocs/compta/paiement/class/paiement.class.php
+++ b/htdocs/compta/paiement/class/paiement.class.php
@@ -275,9 +275,8 @@ class Paiement extends CommonObject
 				return -1;
 			}
 			if (empty($currencyofpayment)) {
-				$currencyofpayment = $this->multicurrency_code[$key];
-			}
-			if ($currencyofpayment != $this->multicurrency_code[$key]) {
+				$currencyofpayment = isset($this->multicurrency_code[$key]) ? $this->multicurrency_code[$key] : "";
+			} else if ($currencyofpayment != $this->multicurrency_code[$key]) {
 				// If we have invoices with different currencies in the payment, we stop here
 				$this->error = 'ErrorYouTryToPayInvoicesWithDifferentCurrenciesInSamePayment';
 				return -1;
diff --git a/htdocs/eventorganization/conferenceorboothattendee_card.php b/htdocs/eventorganization/conferenceorboothattendee_card.php
index 9bab2a7f49d..cb31eb4ac62 100644
--- a/htdocs/eventorganization/conferenceorboothattendee_card.php
+++ b/htdocs/eventorganization/conferenceorboothattendee_card.php
@@ -47,7 +47,8 @@ $cancel = GETPOST('cancel', 'aZ09');
 $contextpage = GETPOST('contextpage', 'aZ') ? GETPOST('contextpage', 'aZ') : 'conferenceorboothattendeecard'; // To manage different context of search
 $backtopage = GETPOST('backtopage', 'alpha');
 $backtopageforcancel = GETPOST('backtopageforcancel', 'alpha');
-//$lineid   = GETPOST('lineid', 'int');
+$lineid   = GETPOST('lineid', 'int');
+$mode = GETPOST('mode', 'alpha');
 
 $conf_or_booth_id = GETPOST('conforboothid', 'int');
 $fk_project = GETPOST('fk_project', 'int');
@@ -233,7 +234,7 @@ if (!empty($withproject)) {
 	// Title
 	$morehtmlref .= $projectstatic->title;
 	// Thirdparty
-	if ($projectstatic->thirdparty->id > 0) {
+	if (!empty($projectstatic->thirdparty->id) && $projectstatic->thirdparty->id > 0) {
 		$morehtmlref .= '<br>'.$projectstatic->thirdparty->getNomUrl(1, 'project');
 	}
 	$morehtmlref .= '</div>';
@@ -384,7 +385,7 @@ if (!empty($withproject)) {
 	//print '</span>';
 	print '</td><td>';
 	$linksuggest = $dolibarr_main_url_root.'/public/project/index.php?id='.$projectstatic->id;
-	$encodedsecurekey = dol_hash($conf->global->EVENTORGANIZATION_SECUREKEY.'conferenceorbooth'.$projectstatic->id, 'md5');
+	$encodedsecurekey = dol_hash(getDolGlobalString("EVENTORGANIZATION_SECUREKEY").'conferenceorbooth'.$projectstatic->id, 'md5');
 	$linksuggest .= '&securekey='.urlencode($encodedsecurekey);
 	//print '<div class="urllink">';
 	//print '<input type="text" value="'.$linksuggest.'" id="linkregister" class="quatrevingtpercent paddingrightonly">';
@@ -401,7 +402,7 @@ if (!empty($withproject)) {
 	//print '</span>';
 	print '</td><td>';
 	$link_subscription = $dolibarr_main_url_root.'/public/eventorganization/attendee_new.php?id='.$projectstatic->id.'&type=global';
-	$encodedsecurekey = dol_hash($conf->global->EVENTORGANIZATION_SECUREKEY.'conferenceorbooth'.$projectstatic->id, 'md5');
+	$encodedsecurekey = dol_hash(getDolGlobalString("EVENTORGANIZATION_SECUREKEY").'conferenceorbooth'.$projectstatic->id, 'md5');
 	$link_subscription .= '&securekey='.urlencode($encodedsecurekey);
 	//print '<div class="urllink">';
 	//print '<input type="text" value="'.$linkregister.'" id="linkregister" class="quatrevingtpercent paddingrightonly">';
@@ -563,7 +564,7 @@ if ($object->id > 0 && (empty($action) || ($action != 'edit' && $action != 'crea
 
 	// Object card
 	// ------------------------------------------------------------
-	$linkback = '<a href="'.dol_buildpath('/eventorganization/conferenceorboothattendee_list.php', 1).'?restore_lastsearch_values=1'.($confOrBooth->id > 0 ? '&conforboothid='.((int) $confOrBooth->id) : '').$moreparam.'">'.$langs->trans("BackToList").'</a>';
+	$linkback = '<a href="'.dol_buildpath('/eventorganization/conferenceorboothattendee_list.php', 1).'?restore_lastsearch_values=1'.(!empty($confOrBooth->id) && $confOrBooth->id > 0 ? '&conforboothid='.((int) $confOrBooth->id) : '').$moreparam.'">'.$langs->trans("BackToList").'</a>';
 
 	$morehtmlref = '<div class="refidno">';
 
@@ -610,7 +611,7 @@ if ($object->id > 0 && (empty($action) || ($action != 'edit' && $action != 'crea
 			print dolGetButtonAction('', $langs->trans('Modify'), 'default', $_SERVER["PHP_SELF"].'?id='.$object->id.(!empty($confOrBooth->id)?'&conforboothid='.$confOrBooth->id:'').(!empty($projectstatic->id)?'&fk_project='.$projectstatic->id:'').'&action=edit&token='.newToken(), '', $permissiontoadd);
 
 			// Clone
-			print dolGetButtonAction('', $langs->trans('ToClone'), 'default', $_SERVER['PHP_SELF'].'?id='.$object->id.'&socid='.$object->socid.'&action=clone&token='.newToken().(!empty($projectstatic->id)?'&fk_project='.$projectstatic->id:''), '', $permissiontoadd);
+			print dolGetButtonAction('', $langs->trans('ToClone'), 'default', $_SERVER['PHP_SELF'].'?id='.$object->id.'&action=clone&token='.newToken().(!empty($projectstatic->id)?'&fk_project='.$projectstatic->id:''), '', $permissiontoadd);
 
 			// Delete (need delete permission, or if draft, just need create/modify permission)
 			print dolGetButtonAction('', $langs->trans('Delete'), 'delete', $_SERVER['PHP_SELF'].'?id='.$object->id.'&action=delete&token='.newToken().(!empty($projectstatic->id)?'&fk_project='.$projectstatic->id:''), '', $permissiontodelete || ($object->status == $object::STATUS_DRAFT && $permissiontoadd));
diff --git a/htdocs/eventorganization/conferenceorboothattendee_list.php b/htdocs/eventorganization/conferenceorboothattendee_list.php
index 1bc9c12d4f6..b9037a366c3 100644
--- a/htdocs/eventorganization/conferenceorboothattendee_list.php
+++ b/htdocs/eventorganization/conferenceorboothattendee_list.php
@@ -57,6 +57,7 @@ $toselect    = GETPOST('toselect', 'array');   // Array of ids of elements selec
 $contextpage = GETPOST('contextpage', 'aZ') ? GETPOST('contextpage', 'aZ') : 'conferenceorboothattendeelist';   // To manage different context of search
 $backtopage  = GETPOST('backtopage', 'alpha');   // Go back to a dedicated page
 $optioncss   = GETPOST('optioncss', 'aZ');   // Option for the css output (always '' except when 'print')
+$mode        = GETPOST('mode', 'alpha');
 
 $id = GETPOST('id', 'int');
 $conf_or_booth_id = GETPOST('conforboothid', 'int');
@@ -239,11 +240,6 @@ $now = dol_now();
 
 //$help_url="EN:Module_ConferenceOrBoothAttendee|FR:Module_ConferenceOrBoothAttendee_FR|ES:Módulo_ConferenceOrBoothAttendee";
 $help_url = '';
-if ($confOrBooth->id > 0) {
-	$title = $langs->trans('ListOfAttendeesPerConference');
-} else {
-	$title = $langs->trans('ListOfAttendeesOfEvent');
-}
 $morejs = array();
 $morecss = array();
 
@@ -377,7 +373,11 @@ if ($num == 1 && !empty($conf->global->MAIN_SEARCH_DIRECT_OPEN_IF_ONLY_ONE) && $
 	exit;
 }
 
-
+if ($confOrBooth->id > 0) {
+	$title = $langs->trans('ListOfAttendeesPerConference');
+} else {
+	$title = $langs->trans('ListOfAttendeesOfEvent');
+}
 
 llxHeader('', $title, $help_url, '', 0, 0, $morejs, $morecss, '', 'classforhorizontalscrolloftabs');
 
@@ -412,7 +412,7 @@ if ($projectstatic->id > 0 || $confOrBooth > 0) {
 		// Title
 		$morehtmlref .= $projectstatic->title;
 		// Thirdparty
-		if ($projectstatic->thirdparty->id > 0) {
+		if (!empty($projectstatic->thirdparty->id) && $projectstatic->thirdparty->id > 0) {
 			$morehtmlref .= '<br>'.$projectstatic->thirdparty->getNomUrl(1, 'project');
 		}
 		$morehtmlref .= '</div>';
@@ -591,7 +591,7 @@ if ($projectstatic->id > 0 || $confOrBooth > 0) {
 		//print '</span>';
 		print '</td><td>';
 		$linksuggest = $dolibarr_main_url_root.'/public/project/index.php?id='.$projectstatic->id;
-		$encodedsecurekey = dol_hash($conf->global->EVENTORGANIZATION_SECUREKEY.'conferenceorbooth'.$projectstatic->id, 'md5');
+		$encodedsecurekey = dol_hash(getDolUserString("EVENTORGANIZATION_SECUREKEYEVENTORGANIZATION_SECUREKEY").'conferenceorbooth'.$projectstatic->id, 'md5');
 		$linksuggest .= '&securekey='.urlencode($encodedsecurekey);
 		//print '<div class="urllink">';
 		//print '<input type="text" value="'.$linksuggest.'" id="linkregister" class="quatrevingtpercent paddingrightonly">';
@@ -608,7 +608,7 @@ if ($projectstatic->id > 0 || $confOrBooth > 0) {
 		//print '</span>';
 		print '</td><td>';
 		$link_subscription = $dolibarr_main_url_root.'/public/eventorganization/attendee_new.php?id='.$projectstatic->id.'&type=global';
-		$encodedsecurekey = dol_hash($conf->global->EVENTORGANIZATION_SECUREKEY.'conferenceorbooth'.$projectstatic->id, 'md5');
+		$encodedsecurekey = dol_hash(getDolUserString("EVENTORGANIZATION_SECUREKEY").'conferenceorbooth'.$projectstatic->id, 'md5');
 		$link_subscription .= '&securekey='.urlencode($encodedsecurekey);
 		//print '<div class="urllink">';
 		//print '<input type="text" value="'.$linkregister.'" id="linkregister" class="quatrevingtpercent paddingrightonly">';
@@ -630,7 +630,7 @@ if ($projectstatic->id > 0 || $confOrBooth > 0) {
 		if (empty($confOrBooth->id)) {
 			$head = conferenceorboothProjectPrepareHead($projectstatic);
 			$tab = 'attendees';
-			print dol_get_fiche_head($head, $tab, $langs->trans("Project"), -1, ($project->public ? 'projectpub' : 'project'), 0, '', 'reposition');
+			print dol_get_fiche_head($head, $tab, $langs->trans("Project"), -1, (!empty($project->public) ? 'projectpub' : 'project'), 0, '', 'reposition');
 		}
 	}
 
@@ -797,11 +797,11 @@ foreach ($object->fields as $key => $val) {
 	if (!empty($arrayfields['t.'.$key]['checked'])) {
 		print '<td class="liste_titre'.($cssforfield ? ' '.$cssforfield : '').'">';
 		if (!empty($val['arrayofkeyval']) && is_array($val['arrayofkeyval'])) {
-			print $form->selectarray('search_'.$key, $val['arrayofkeyval'], $search[$key], $val['notnull'], 0, 0, '', 1, 0, 0, '', 'maxwidth100', 1);
+			print $form->selectarray('search_'.$key, $val['arrayofkeyval'], (isset($search[$key]) ? $search[$key] : ''), $val['notnull'], 0, 0, '', 1, 0, 0, '', 'maxwidth100', 1);
 		} elseif ((strpos($val['type'], 'integer:') === 0) || (strpos($val['type'], 'sellist:')=== 0)) {
-			print $object->showInputField($val, $key, $search[$key], '', '', 'search_', 'maxwidth125', 1);
+			print $object->showInputField($val, $key, (isset($search[$key]) ? $search[$key] : ''), '', '', 'search_', 'maxwidth125', 1);
 		} elseif (!preg_match('/^(date|timestamp|datetime)/', $val['type'])) {
-			print '<input type="text" class="flat maxwidth75" name="search_'.$key.'" value="'.dol_escape_htmltag($search[$key]).'">';
+			print '<input type="text" class="flat maxwidth75" name="search_'.$key.'" value="'.(isset($search[$key]) ? dol_escape_htmltag($search[$key]) : "").'">';
 		} elseif (preg_match('/^(date|timestamp|datetime)/', $val['type'])) {
 			print '<div class="nowrap">';
 			print $form->selectDate($search[$key.'_dtstart'] ? $search[$key.'_dtstart'] : '', "search_".$key."_dtstart", 0, 0, 1, '', 1, 0, 0, '', '', '', '', 1, '', $langs->trans('From'));
@@ -872,6 +872,7 @@ if (isset($extrafields->attributes[$object->table_element]['computed']) && is_ar
 // --------------------------------------------------------------------
 $i = 0;
 $totalarray = array();
+$totalarray['nbfield'] = 0;
 while ($i < ($limit ? min($num, $limit) : $num)) {
 	$obj = $db->fetch_object($resql);
 	if (empty($obj)) {
@@ -880,7 +881,6 @@ while ($i < ($limit ? min($num, $limit) : $num)) {
 
 	// Store properties in $object
 	$object->setVarsFromFetchObj($obj);
-
 	// Show here line of result
 	print '<tr class="oddeven">';
 	foreach ($object->fields as $key => $val) {
diff --git a/htdocs/projet/element.php b/htdocs/projet/element.php
index 935275bfe54..7d6d33be834 100644
--- a/htdocs/projet/element.php
+++ b/htdocs/projet/element.php
@@ -793,7 +793,7 @@ foreach ($listofreferent as $key => $value) {
 			for ($i = 0; $i < $num; $i++) {
 				$tmp = explode('_', $elementarray[$i]);
 				$idofelement = $tmp[0];
-				$idofelementuser = $tmp[1];
+				$idofelementuser = !empty($tmp[1]) ? $tmp[1] : "";
 
 				$element->fetch($idofelement);
 				if ($idofelementuser) {
diff --git a/htdocs/projet/tasks/task.php b/htdocs/projet/tasks/task.php
index dfa26202a2d..8a0d976b379 100644
--- a/htdocs/projet/tasks/task.php
+++ b/htdocs/projet/tasks/task.php
@@ -46,6 +46,7 @@ $taskref = GETPOST("taskref", 'alpha'); // task ref
 $withproject = GETPOST('withproject', 'int');
 $project_ref = GETPOST('project_ref', 'alpha');
 $planned_workload = ((GETPOST('planned_workloadhour', 'int') != '' || GETPOST('planned_workloadmin', 'int') != '') ? (GETPOST('planned_workloadhour', 'int') > 0 ?GETPOST('planned_workloadhour', 'int') * 3600 : 0) + (GETPOST('planned_workloadmin', 'int') > 0 ?GETPOST('planned_workloadmin', 'int') * 60 : 0) : '');
+$mode = GETPOST('mode', 'alpha');
 
 // Initialize technical object to manage hooks of page. Note that conf->hooks_modules contains array of hook context
 $hookmanager->initHooks(array('projecttaskcard', 'globalcard'));
diff --git a/htdocs/user/group/list.php b/htdocs/user/group/list.php
index 05adcf15059..94331d44d3d 100644
--- a/htdocs/user/group/list.php
+++ b/htdocs/user/group/list.php
@@ -45,6 +45,7 @@ $mode       = GETPOST('mode', 'aZ');
 
 $search_all = trim((GETPOST('search_all', 'alphanohtml') != '') ? GETPOST('search_all', 'alphanohtml') : GETPOST('sall', 'alphanohtml'));
 $search_group = GETPOST('search_group');
+$search = array();
 
 // Load variable for pagination
 $limit = GETPOST('limit', 'int') ?GETPOST('limit', 'int') : $conf->liste_limit;