* fix a bug when order has limit string.

lib/dao/dao.class.php

@@ -1529,8 +1529,13 @@ class sql
 
         $order  = str_replace(array('|', '
', '_'), ' ', $order);
 
-        /* Add "`" in order. */
-        $orders = explode(',', $order);
+        /* Add "`" in order string. */
+        /* When order has limit string. */
+        $pos    = stripos($order, 'limit');
+        $orders = $pos ? substr($order, 0, $pos) : $order;
+        $limit  = $pos ? substr($order, $pos) : '';
+
+        $orders = explode(',', $orders);
         foreach($orders as $i => $order)
         {
             $orderParse = explode(' ', trim($order));
@@ -1539,15 +1544,17 @@ class sql
                 $value = trim($value);
                 if(empty($value) or strtolower($value) == 'desc' or strtolower($value) == 'asc') continue;
                 $field = trim($value, '`');
+
                 /* such as t1.id field. */
                 if(strpos($value, '.') !== false) list($table, $field) = explode('.', $field);
                 $field = "`$field`";
+
                 $orderParse[$key] = isset($table) ? $table . '.' . $field :  $field;
                 unset($table);
             }
             $orders[$i] = join(' ', $orderParse);
         }
-        $order = join(',', $orders);
+        $order = join(',', $orders) . ' ' . $limit;
 
         $this->sql .= ' ' . DAO::ORDERBY . " $order";
         return $this;