mako\cache\File

public function __construct(array $config)
{
	parent::__construct($config['identifier']);
	
	$this->path = $config['path'];

	if(file_exists($this->path) === false || is_readable($this->path) === false || is_writable($this->path) === false)
	{
		throw new RuntimeException(vsprintf("%s(): Cache directory ('%s') is not writable.", array(__METHOD__, $this->path)));
	}
}

public function write($key, $value, $ttl = 0)
{
	$ttl = (((int) $ttl === 0) ? 31556926 : (int) $ttl) + time();

	$data = "<?php defined('MAKO_APPLICATION') or die(); ?>\n{$ttl}\n" . serialize($value);

	return is_int(file_put_contents("{$this->path}/mako_{$this->identifier}_{$key}.php", $data, LOCK_EX));
}

public function read($key)
{
	if(file_exists("{$this->path}/mako_{$this->identifier}_{$key}.php"))
	{
		// Cache exists
		
		$handle = fopen("{$this->path}/mako_{$this->identifier}_{$key}.php", 'r');

		fgets($handle); // skip first line

		if(time() < (int) fgets($handle))
		{
			// Cache has not expired ... fetch it

			$cache = '';

			while(!feof($handle))
			{
				$cache .= fgets($handle);
			}

			fclose($handle);

			return unserialize($cache);
		}
		else
		{
			// Cache has expired ... delete it

			unlink("{$this->path}/mako_{$this->identifier}_{$key}.php");

			return false;
		}
	}
	else
	{
		// Cache doesn't exist

		return false;
	}
}

public function delete($key)
{
	if(file_exists("{$this->path}/mako_{$this->identifier}_{$key}.php"))
	{
		return unlink("{$this->path}/mako_{$this->identifier}_{$key}.php");
	}

	return false;
}

public function clear()
{
	$files = scandir($this->path);

	if($files !== false)
	{
		foreach($files as $file)
		{
			if(mb_substr($file, 0, 5) === 'mako_')
			{
				if(unlink("{$this->path}/{$file}") === false)
				{
					return false;
				}
			}
		}
	}

	return true;
}