diff --git a/htdocs/core/actions_linkedfiles.inc.php b/htdocs/core/actions_linkedfiles.inc.php
index 3e2438f63d3..9a37eb17e12 100644
--- a/htdocs/core/actions_linkedfiles.inc.php
+++ b/htdocs/core/actions_linkedfiles.inc.php
@@ -38,7 +38,7 @@ if (GETPOST('uploadform', 'int') && empty($_POST) && empty($_FILES)) {
 
 // Submit file/link
 if (GETPOST('sendit', 'alpha') && !empty($conf->global->MAIN_UPLOAD_DOC) && (!isset($permissiontoadd) || $permissiontoadd)) {
-	if (!empty($_FILES)) {
+	if (!empty($_FILES) && is_array($_FILES['userfile'])) {
 		if (is_array($_FILES['userfile']['tmp_name'])) {
 			$userfiles = $_FILES['userfile']['tmp_name'];
 		} else {
diff --git a/htdocs/ecm/index.php b/htdocs/ecm/index.php
index 813ee69b6fb..d9e5291c2dc 100644
--- a/htdocs/ecm/index.php
+++ b/htdocs/ecm/index.php
@@ -102,10 +102,13 @@ if (GETPOST("sendit", 'alphanohtml') && !empty($conf->global->MAIN_UPLOAD_DOC))
 	}
 	$upload_dir = $conf->ecm->dir_output.'/'.$relativepath;
 
-	if (is_array($_FILES['userfile']['tmp_name'])) {
-		$userfiles = $_FILES['userfile']['tmp_name'];
-	} else {
-		$userfiles = array($_FILES['userfile']['tmp_name']);
+	$userfiles = [];
+	if (is_array($_FILES['userfile'])) {
+		if (is_array($_FILES['userfile']['tmp_name'])) {
+			$userfiles = $_FILES['userfile']['tmp_name'];
+		} else {
+			$userfiles = array($_FILES['userfile']['tmp_name']);
+		}
 	}
 
 	foreach ($userfiles as $key => $userfile) {
diff --git a/htdocs/expensereport/tpl/expensereport_linktofile.tpl.php b/htdocs/expensereport/tpl/expensereport_linktofile.tpl.php
index 9264400a71f..8b158f86dc4 100644
--- a/htdocs/expensereport/tpl/expensereport_linktofile.tpl.php
+++ b/htdocs/expensereport/tpl/expensereport_linktofile.tpl.php
@@ -97,7 +97,7 @@ if (empty($conf->global->EXPENSEREPORT_DISABLE_ATTACHMENT_ON_LINES)) {
 			$checked = '';
 			//var_dump(GETPOST($file['relativename'])); var_dump($file['relativename']); var_dump($_FILES['userfile']['name']);
 			// If a file was just uploaded, we check to preselect it
-			if (is_array($_FILES['userfile']['name'])) {
+			if (is_array($_FILES['userfile']) && is_array($_FILES['userfile']['name'])) {
 				foreach ($_FILES['userfile']['name'] as $tmpfile) {
 					if ($file['relativename'] == (GETPOST('savingdocmask', 'alpha') ? dol_sanitizeFileName($object->ref.'-') : '').$tmpfile) {
 						$checked = ' checked';
diff --git a/htdocs/website/index.php b/htdocs/website/index.php
index b7062b4f599..772832ea2cc 100644
--- a/htdocs/website/index.php
+++ b/htdocs/website/index.php
@@ -2221,7 +2221,7 @@ if ($action == 'importsiteconfirm' && $usercanedit) {
 			$fileofzip = '';
 			if (GETPOSTISSET('templateuserfile')) {
 				$fileofzip = DOL_DATA_ROOT.'/doctemplates/websites/'.GETPOST('templateuserfile', 'alpha');
-			} elseif (!empty($_FILES)) {
+			} elseif (!empty($_FILES) && is_array($_FILES['userfile'])) {
 				if (is_array($_FILES['userfile']['tmp_name'])) {
 					$userfiles = $_FILES['userfile']['tmp_name'];
 				} else {