make the database list more magic:

load/fetch only if really required
use SPL ArrayObject to behave like an array

libraries/PMA.php

@@ -0,0 +1,94 @@
+<?php
+/**
+ * Enter description here...
+ *
+ */
+require_once './libraries/List_Database.class.php';
+
+/**
+ * phpMyAdmin mian Controller
+ * 
+ * 
+ *
+ */
+class PMA
+{
+    /**
+     * Holds database list
+     *
+     * @var PMA_List_Datase
+     */
+    protected $databases = null;
+    
+    /**
+     * DBMS user link
+     *
+     * @var resource
+     */
+    protected $userlink = null;
+    
+    /**
+     * DBMS control link
+     *
+     * @var resource
+     */
+    protected $controllink = null;
+    
+    /**
+     * magic access to protected/inaccessible members/properties
+     *
+     * @see http://php.net/language.oop5.overloading
+     */
+    public function __get($param)
+    {
+        switch ($param) {
+            case 'databases' :
+                return $this->getDatabaseList();
+                break;
+            case 'userlink' :
+                return $this->userlink;
+                break;
+            case 'controllink' :
+                return $this->controllink;
+                break;
+        }
+        
+        return null;
+    }
+    
+    /**
+     * magic access to protected/inaccessible members/properties
+     *
+     * @see http://php.net/language.oop5.overloading
+     */
+    public function __set($param, $value)
+    {
+        switch ($param) {
+            case 'userlink' :
+                $this->userlink = $value;
+                break;
+            case 'controllink' :
+                $this->controllink = $value;
+                break;
+        }
+    }
+    
+    /**
+     * Accessor to PMA::$databases
+     *
+     * @uses    PMA::$databases
+     * @uses    PMA::$userlink
+     * @uses    PMA::$controllink
+     * @uses    PMA_List_Database
+     * @return PMA_List_Databases
+     */
+    public function getDatabaseList()
+    {
+        if (null === $this->databases) {
+            $this->databases = new PMA_List_Database($this->userlink, $this->controllink);
+        }
+        
+        return $this->databases;
+    }
+}
+?>