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<?php |
<?php |
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// definition |
// definition |
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class NCache |
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{ |
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function __construct() { } |
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/** |
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* Factory. |
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* |
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* @param string $path where cache file store is located, relative to app path. |
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* @param integer $timeout in seconds |
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* |
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* @return NCache |
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*/ |
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function build($path, $timeout = 3600) |
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{ |
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$path = __DIR__ . '/' . $path; |
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if (!is_dir($path)) |
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return null; |
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if ($timeout < 60) |
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$timeout = 60; |
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$i = new self; |
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$i->_path = $path; |
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$i->_timeout = $timeout; |
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return $i; |
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} |
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/** |
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* Get value for $key. |
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* |
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* @param mixed $key |
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* |
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* @return mixed |
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*/ |
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function get($key = null) |
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{ |
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if (is_null($key)) |
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return false; |
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$filename = $this->_get_filename($key); |
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if ($this->_is_valid_file($filename, $this->_timeout)) { |
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return unserialize(file_get_contents($filename)); |
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} |
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return null; |
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} |
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/** |
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* Save $value under $key. |
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* |
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* @param mixed $key |
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* @param mixed $value |
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*/ |
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function set($key, $value) |
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{ |
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if (is_null($key)) |
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return false; |
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$filename = $this->_get_filename($key); |
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file_put_contents($filename, serialize($value)); |
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return true; |
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} |
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/** |
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* Get cache file from key. |
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* |
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* @param mixed $key |
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* |
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* @return string |
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*/ |
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private function _get_filename($key) |
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{ |
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$key = hash('sha1', serialize($key)); |
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return $this->_path . '/' . $key . '.cache'; |
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} |
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/** |
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* Check that the cache file exists and has not expired. |
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* |
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* @param string $filename |
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* |
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* @return boolean |
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*/ |
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private function _is_valid_file($filename, $timeout) |
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{ |
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if (!file_exists($filename)) { |
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//error_log(sprintf('Could not find %s', $filename), 0); |
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return false; |
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} |
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if (filemtime($filename) + $timeout < time()) { |
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//error_log(sprintf('%s timestamp expired (timeout was %ds.).', $filename, $timeout)); |
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unlink($filename); |
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return false; |
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} |
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//error_log(sprintf('Found %s', $filename)); |
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return true; |
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} |
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} |
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class l10n |
class l10n |
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{ |
{ |
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public static $t; |
public static $t; |