diff --git a/htdocs/admin/security_file.php b/htdocs/admin/security_file.php
index 2b6a4e81fb4..12c90cf3c21 100644
--- a/htdocs/admin/security_file.php
+++ b/htdocs/admin/security_file.php
@@ -66,7 +66,7 @@ if ($action == 'updateform') {
 } elseif ($action == 'delete') {
 	// Delete file
 	$langs->load("other");
-	$file = $conf->admin->dir_temp.'/'.GETPOST('urlfile', 'alpha'); // Do not use urldecode here ($_GET and $_REQUEST are already decoded by PHP).
+	$file = $conf->admin->dir_temp.'/'.GETPOST('urlfile', 'alpha');
 	$ret = dol_delete_file($file);
 	if ($ret) {
 		setEventMessages($langs->trans("FileWasRemoved", GETPOST('urlfile', 'alpha')), null, 'mesgs');
diff --git a/htdocs/commande/list.php b/htdocs/commande/list.php
index 3747b2107b2..2c08bb8684a 100644
--- a/htdocs/commande/list.php
+++ b/htdocs/commande/list.php
@@ -887,7 +887,6 @@ if ($resql) {
 	}
 
 	if ($massaction == 'createbills') {
-		//var_dump($_REQUEST);
 		print '<input type="hidden" name="massaction" value="confirm_createbills">';
 
 		print '<table class="noborder" width="100%" >';
diff --git a/htdocs/compta/bank/card.php b/htdocs/compta/bank/card.php
index bf30b1831f9..30aa32a8d58 100644
--- a/htdocs/compta/bank/card.php
+++ b/htdocs/compta/bank/card.php
@@ -829,7 +829,7 @@ if ($action == 'create') {
 		print '<form action="'.$_SERVER["PHP_SELF"].'?id='.$object->id.'" method="post" name="formsoc">';
 		print '<input type="hidden" name="token" value="'.newToken().'">';
 		print '<input type="hidden" name="action" value="update">';
-		print '<input type="hidden" name="id" value="'.$_REQUEST["id"].'">'."\n\n";
+		print '<input type="hidden" name="id" value="'.GETPOST("id", 'int').'">'."\n\n";
 
 		print dol_get_fiche_head(array(), 0, '', 0);
 
diff --git a/htdocs/compta/paiement/cheque/card.php b/htdocs/compta/paiement/cheque/card.php
index 39b5ded892b..04eee81ced0 100644
--- a/htdocs/compta/paiement/cheque/card.php
+++ b/htdocs/compta/paiement/cheque/card.php
@@ -126,8 +126,8 @@ if ($action == 'create' && GETPOST("accountid", "int") > 0 && $user->rights->ban
 				// Define output language
 				$outputlangs = $langs;
 				$newlang = '';
-				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && !empty($_REQUEST['lang_id'])) {
-					$newlang = $_REQUEST['lang_id'];
+				if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+					$newlang = GETPOST('lang_id', 'aZ09');
 				}
 				//if ($conf->global->MAIN_MULTILANGS && empty($newlang)) $newlang=$object->client->default_lang;
 				if (!empty($newlang)) {
@@ -177,8 +177,8 @@ if ($action == 'confirm_validate' && $confirm == 'yes' && $user->rights->banque-
 		// Define output language
 		$outputlangs = $langs;
 		$newlang = '';
-		if ($conf->global->MAIN_MULTILANGS && empty($newlang) && !empty($_REQUEST['lang_id'])) {
-			$newlang = $_REQUEST['lang_id'];
+		if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+			$newlang = GETPOST('lang_id', 'aZ09');
 		}
 		//if ($conf->global->MAIN_MULTILANGS && empty($newlang)) $newlang=$object->client->default_lang;
 		if (!empty($newlang)) {
@@ -219,8 +219,8 @@ if ($action == 'builddoc' && $user->rights->banque->cheque) {
 
 	$outputlangs = $langs;
 	$newlang = '';
-	if ($conf->global->MAIN_MULTILANGS && empty($newlang) && !empty($_REQUEST['lang_id'])) {
-		$newlang = $_REQUEST['lang_id'];
+	if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+		$newlang = GETPOST('lang_id', 'aZ09');
 	}
 	//if ($conf->global->MAIN_MULTILANGS && empty($newlang)) $newlang=$object->client->default_lang;
 	if (!empty($newlang)) {
diff --git a/htdocs/core/lib/sendings.lib.php b/htdocs/core/lib/sendings.lib.php
index 15e7286ab08..880019d7b97 100644
--- a/htdocs/core/lib/sendings.lib.php
+++ b/htdocs/core/lib/sendings.lib.php
@@ -316,8 +316,8 @@ function show_list_sending_receive($origin, $origin_id, $filter = '')
 
 						$outputlangs = $langs;
 						$newlang = '';
-						if (empty($newlang) && !empty($_REQUEST['lang_id'])) {
-							$newlang = $_REQUEST['lang_id'];
+						if (empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+							$newlang = GETPOST('lang_id', 'aZ09');
 						}
 						if (empty($newlang)) {
 							$newlang = $object->thirdparty->default_lang;
diff --git a/htdocs/core/tpl/card_presend.tpl.php b/htdocs/core/tpl/card_presend.tpl.php
index bca1386c82e..9c1387d7d58 100644
--- a/htdocs/core/tpl/card_presend.tpl.php
+++ b/htdocs/core/tpl/card_presend.tpl.php
@@ -58,8 +58,8 @@ if ($action == 'presend') {
 	// Define output language
 	$outputlangs = $langs;
 	$newlang = '';
-	if ($conf->global->MAIN_MULTILANGS && empty($newlang) && !empty($_REQUEST['lang_id'])) {
-		$newlang = $_REQUEST['lang_id'];
+	if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+		$newlang = GETPOST('lang_id', 'aZ09');
 	}
 	if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
 		$newlang = $object->thirdparty->default_lang;
diff --git a/htdocs/delivery/card.php b/htdocs/delivery/card.php
index 2c6415f17b7..4855c9c1e49 100644
--- a/htdocs/delivery/card.php
+++ b/htdocs/delivery/card.php
@@ -542,8 +542,8 @@ if ($action == 'create') {    // Create. Seems to no be used
 						if (!empty($conf->global->MAIN_MULTILANGS) && !empty($conf->global->PRODUIT_TEXTS_IN_THIRDPARTY_LANGUAGE)) {
 							$outputlangs = $langs;
 							$newlang = '';
-							if (empty($newlang) && !empty($_REQUEST['lang_id'])) {
-								$newlang = $_REQUEST['lang_id'];
+							if (empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+								$newlang = GETPOST('lang_id', 'aZ09');
 							}
 							if (empty($newlang)) {
 								$newlang = $object->thirdparty->default_lang;
diff --git a/htdocs/expedition/shipment.php b/htdocs/expedition/shipment.php
index 1231f0b513e..8f5903dd988 100644
--- a/htdocs/expedition/shipment.php
+++ b/htdocs/expedition/shipment.php
@@ -687,8 +687,8 @@ if ($id > 0 || !empty($ref)) {
 
 							$outputlangs = $langs;
 							$newlang = '';
-							if (empty($newlang) && !empty($_REQUEST['lang_id'])) {
-								$newlang = $_REQUEST['lang_id'];
+							if (empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+								$newlang = GETPOST('lang_id', 'aZ09');
 							}
 							if (empty($newlang)) {
 								$newlang = $object->thirdparty->default_lang;
diff --git a/htdocs/ticket/card.php b/htdocs/ticket/card.php
index 4b4b8e594d4..e04e3c51ce3 100644
--- a/htdocs/ticket/card.php
+++ b/htdocs/ticket/card.php
@@ -1364,8 +1364,8 @@ if ($action == 'create' || $action == 'presend') {
 			// Define output language
 			$outputlangs = $langs;
 			$newlang = '';
-			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && !empty($_REQUEST['lang_id'])) {
-				$newlang = $_REQUEST['lang_id'];
+			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+				$newlang = GETPOST('lang_id', 'aZ09');
 			}
 			if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
 				$newlang = $object->default_lang;