provide ability to unset session language

2 files changed, 12 insertions, 2 deletions

diff --git a/include/text.php b/include/text.php
index 9ed6d23bf..37af65c70 100644
--- a/include/text.php
+++ b/include/text.php
@@ -847,10 +847,16 @@ function lang_selector() {
 	$o .= '<form action="" method="post" ><select name="system_language" onchange="this.form.submit();" >';
 	$langs = glob('view/*/strings.php');
 	if(is_array($langs) && count($langs)) {
+		$langs[] = '';
 		if(! in_array('view/en/strings.php',$langs))
 			$langs[] = 'view/en/';
 		asort($langs);
 		foreach($langs as $l) {
+			if($l == '') {
+				$default_selected = ((! x($_SESSION,'language')) ? ' selected="selected" ' : '');
+				$o .= '<option value="" ' . $default_selected . '>' . t('default') . '</option>';
+				continue;
+			}
 			$ll = substr($l,5);
 			$ll = substr($ll,0,strrpos($ll,'/'));
 			$selected = (($ll === $lang) ? ' selected="selected" ' : '');
diff --git a/index.php b/index.php
index 80e8ca3b0..17d250e5f 100644
--- a/index.php
+++ b/index.php
@@ -84,8 +84,12 @@ session_start();
  * We have to do it here because the session was just now opened.
  */
 
-if(x($_POST,'system_language'))
-	$_SESSION['language'] = $_POST['system_language'];
+if(array_key_exists('system_language',$_POST)) {
+	if(strlen($_POST['system_language']))
+		$_SESSION['language'] = $_POST['system_language'];
+	else
+		unset($_SESSION['language']);
+}
 if((x($_SESSION,'language')) && ($_SESSION['language'] !== $lang)) {
 	$lang = $_SESSION['language'];
 	load_translation_table($lang);