diff --git a/htdocs/admin/system/security.php b/htdocs/admin/system/security.php
index 36f08309e02..a4060634ff9 100644
--- a/htdocs/admin/system/security.php
+++ b/htdocs/admin/system/security.php
@@ -155,7 +155,7 @@ print '<strong>'.$langs->trans("PermissionsOnFilesInWebRoot").'</strong>: ';
 $arrayoffilesinroot = dol_dir_list(DOL_DOCUMENT_ROOT, 'all', 1, '', array('\/custom'), 'name', SORT_ASC, 4, 1, '', 1);
 $fileswithwritepermission = array();
 foreach ($arrayoffilesinroot as $fileinroot) {
-	// Test permission on file
+	// Test if there is at least one write permission file. If yes, add the entry into array $fileswithwritepermission
 	if ($fileinroot['perm'] & 0222) {
 		$fileswithwritepermission[] = $fileinroot['relativename'];
 	}
diff --git a/htdocs/public/agenda/agendaexport.php b/htdocs/public/agenda/agendaexport.php
index 5d48ffb06fe..a2e18e8458c 100644
--- a/htdocs/public/agenda/agendaexport.php
+++ b/htdocs/public/agenda/agendaexport.php
@@ -96,9 +96,9 @@ if (!isset($conf->global->MAIN_AGENDA_EXPORT_PAST_DELAY)) {
 $format = 'ical';
 $type = 'event';
 if (GETPOST("format", 'alpha')) {
-	$format = GETPOST("format", 'apha');
+	$format = GETPOST("format", 'alpha');
 }
-if (GETPOST("type", 'apha')) {
+if (GETPOST("type", 'alpha')) {
 	$type = GETPOST("type", 'alpha');
 }
 
@@ -115,20 +115,20 @@ if (GETPOST("idfrom", 'int')) {
 if (GETPOST("idto", 'int')) {
 	$filters['idto'] = GETPOST("idto", 'int');
 }
-if (GETPOST("project", 'apha')) {
-	$filters['project'] = GETPOST("project", 'apha');
+if (GETPOST("project", 'alpha')) {
+	$filters['project'] = GETPOST("project", 'alpha');
 }
-if (GETPOST("logina", 'apha')) {
-	$filters['logina'] = GETPOST("logina", 'apha');
+if (GETPOST("logina", 'alpha')) {
+	$filters['logina'] = GETPOST("logina", 'alpha');
 }
-if (GETPOST("logint", 'apha')) {
-	$filters['logint'] = GETPOST("logint", 'apha');
+if (GETPOST("logint", 'alpha')) {
+	$filters['logint'] = GETPOST("logint", 'alpha');
 }
-if (GETPOST("notactiontype", 'apha')) {
-	$filters['notactiontype'] = GETPOST("notactiontype", 'apha');
+if (GETPOST("notactiontype", 'alpha')) {
+	$filters['notactiontype'] = GETPOST("notactiontype", 'alpha');
 }
-if (GETPOST("actiontype", 'apha')) {
-	$filters['actiontype'] = GETPOST("actiontype", 'apha');
+if (GETPOST("actiontype", 'alpha')) {
+	$filters['actiontype'] = GETPOST("actiontype", 'alpha');
 }
 if (GETPOST("notolderthan", 'int')) {
 	$filters['notolderthan'] = GETPOST("notolderthan", "int");