Speed performance: Use static to avoid querying the database.

main/inc/lib/api.lib.php

@@ -4884,18 +4884,27 @@ function api_get_languages_to_array()
  */
 function api_get_language_id($language)
 {
-    $tbl_language = Database::get_main_table(TABLE_MAIN_LANGUAGE);
     if (empty($language)) {
         return null;
     }
+
+    static $staticResult;
+
+    if (isset($staticResult[$language])) {
+        return $staticResult[$language];
+    } else {
+        $table = Database::get_main_table(TABLE_MAIN_LANGUAGE);
         $language = Database::escape_string($language);
-    $sql = "SELECT id FROM $tbl_language
+        $sql = "SELECT id FROM $table
                 WHERE dokeos_folder = '$language' LIMIT 1";
         $result = Database::query($sql);
         $row = Database::fetch_array($result);
 
+        $staticResult[$language] = $row['id'];
+
         return $row['id'];
     }
+}
 
 /**
  * Gets language of the requested type for the current user. Types are :