[ClassLoader] added an apc class loader

src/Symfony/Component/ClassLoader/ApcUniversalClassLoader.php

@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\ClassLoader;
+
+require_once __DIR__.'/UniversalClassLoader.php';
+
+/**
+ * Class loader utilizing APC to remember where files are.
+ *
+ * @author Kris Wallsmith <kris.wallsmith@symfony.com>
+ */
+class ApcUniversalClassLoader extends UniversalClassLoader
+{
+    private $prefix;
+
+    /**
+     * Constructor.
+     *
+     * @param string $prefix A prefix to create a namespace in APC
+     */
+    public function __construct($prefix)
+    {
+        $this->prefix = $prefix;
+    }
+
+    protected function findFile($class)
+    {
+        if (false === $file = apc_fetch($this->prefix.$class)) {
+            apc_store($this->prefix.$class, $file = parent::findFile($class));
+        }
+
+        return $file;
+    }
+}