refactoring of facets & tags rendering (more readability and speed)

library/Class/MoteurRecherche/Facettes.php

@@ -47,7 +47,7 @@ class Class_MoteurRecherche_Facettes {
                  "nombre" => $preferences["tags_nombre"]);
 
     if(!$p_facette["actif"] and !$p_tag["actif"])
-      return $result;
+     return $result;
 
     // Lecture des notices
     $codes_count = $this->fetchFacetsRows($req);
@@ -65,14 +65,12 @@ class Class_MoteurRecherche_Facettes {
 
 
   public function fetchFacetsRows($req) {
-    $all = [];
-    array_map(
-              function($row) use (&$all){
-                $all = array_merge($all,
-                                   explode(' ',  $row['facettes']));
-              },
-              Zend_Registry::get('sql')->fetchAll($req));
-    $all = array_count_values(array_filter($all));
+    $all = array_count_values(
+                         array_filter(
+                            explode(' ',
+                                implode(' ',
+                                   array_column(Zend_Registry::get('sql')->fetchAll($req),
+                                                'facettes')))));
     arsort($all);
     return $all;
   }