use correct key of $attributes_map for sorting LDAP multivalued attri…

…butes (#171)

htdocs/display.php

@@ -92,9 +92,29 @@
         # Sort attributes values
         foreach ($entry[0] as $attr => $values) {
             if ( is_array($values) && $values['count'] > 1 ) {
-                if(isset($attributes_map[$attr]['sort']))
+
+                # Find key in attributes_map
+                $attributes_map_filter = array_filter($attributes_map, function($v) use(&$attr) {
+                    return $v['attribute'] == "$attr";
+                });
+                if( count($attributes_map_filter) < 1 )
+                {
+                    $k = "";
+                    error_log("WARN: no key found for attribute $attr in \$attributes_map");
+                }
+                elseif( count($attributes_map_filter) > 1 )
+                {
+                    $k = array_key_first($attributes_map_filter);
+                    error_log("WARN: multiple keys found for attribute $attr in \$attributes_map, using first one: $k");
+                }
+                else
+                {
+                    $k = array_key_first($attributes_map_filter);
+                }
+
+                if(isset($attributes_map[$k]['sort']))
                 {
-                    if($attributes_map[$attr]['sort'] == "descending" )
+                    if($attributes_map[$k]['sort'] == "descending" )
                     {
                         # descending sort
                         arsort($values);