String utils

src/Utils/Business/LuStringUtils.php

             return null;
         }
     }
+
+    public static function endsWith($haystack, $needle) {
+        return $needle === "" || (($temp = strlen($haystack) - strlen($needle)) >= 0
+            && strpos($haystack, $needle, $temp) !== false);
+    }
+
+    public static function startsWith($haystack, $needle) {
+        return $needle === "" || strrpos($haystack, $needle, -strlen($haystack)) !== false;
+    }
 }

src/Utils/Dbo/LuDbo.php

         return $obj;
     }
 
-    public static function endsWith($haystack, $needle) {
-        return $needle === "" || (($temp = strlen($haystack) - strlen($needle)) >= 0
-            && strpos($haystack, $needle, $temp) !== false);
-    }
-
     public static function deserializeValue($value, $type) {
         if (is_null($value)) {
             return null;
         else if ($type == "mixed") {
             return $value;
         }
-        else if (self::endsWith($type, "[]")) {
+        else if (LuStringUtils::endsWith($type, "[]")) {
             if (!is_array($value)) {
                 throw new LuDboDeserializeException("Invalid array value");
             }