initial commit of laravel!

system/cache/driver/file.php

@@ -0,0 +1,95 @@
+<?php namespace System\Cache\Driver;
+
+class File implements \System\Cache\Driver {
+
+	/**
+	 * All of the loaded cache items.
+	 *
+	 * @var array
+	 */
+	private $items = array();
+
+	/**
+	 * Determine if an item exists in the cache.
+	 *
+	 * @param  string  $key
+	 * @return bool
+	 */
+	public function has($key)
+	{
+		return ( ! is_null($this->get($key)));
+	}
+
+	/**
+	 * Get an item from the cache.
+	 *
+	 * @param  string  $key
+	 * @param  mixed   $default
+	 * @return mixed
+	 */	
+	public function get($key, $default = null)
+	{
+		// --------------------------------------------------
+		// If the item has already been loaded, return it.
+		// --------------------------------------------------
+		if (array_key_exists($key, $this->items))
+		{
+			return $this->items[$key];
+		}
+
+		// --------------------------------------------------
+		// Verify that the cache file exists.
+		// --------------------------------------------------
+		if ( ! file_exists(APP_PATH.'cache/'.$key))
+		{
+			return $default;
+		}
+
+		// --------------------------------------------------
+		// Read the contents of the cache file.
+		// --------------------------------------------------
+		$cache = file_get_contents(APP_PATH.'cache/'.$key);
+
+		// --------------------------------------------------
+		// Has the cache expired? The UNIX expiration time
+		// is stored at the beginning of the file.
+		// --------------------------------------------------
+		if (time() >= substr($cache, 0, 10))
+		{
+			$this->forget($key);
+
+			return $default;
+		}
+
+		return $this->items[$key] = unserialize(substr($cache, 10));
+	}
+
+	/**
+	 * Write an item to the cache.
+	 *
+	 * @param  string  $key
+	 * @param  mixed   $value
+	 * @param  int     $minutes
+	 * @return void
+	 */
+	public function put($key, $value, $minutes)
+	{
+		// --------------------------------------------------
+		// The expiration time is stored as a UNIX timestamp
+		// at the beginning of the cache file.
+		// --------------------------------------------------
+		file_put_contents(APP_PATH.'cache/'.$key, (time() + ($minutes * 60)).serialize($value), LOCK_EX);
+	}
+
+	/**
+	 * Delete an item from the cache.
+	 *
+	 * @param  string  $key
+	 * @return void
+	 */
+	public function forget($key)
+	{
+		@unlink(APP_PATH.'cache/'.$key);
+	}
+
+}