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- <?php
- /**
- *
- * The Plain File driver for SharedMemory
- *
- * PHP versions 4 and 5
- *
- * LICENSE: This source file is subject to version 3.0 of the PHP license
- * that is available through the world-wide-web at the following URI:
- * http://www.php.net/license/3_0.txt. If you did not receive a copy of
- * the PHP License and are unable to obtain it through the web, please
- * send a note to license@php.net so we can mail you a copy immediately.
- *
- * @category System
- * @package System_Sharedmemory
- * @author Evgeny Stepanischev <bolk@lixil.ru>
- * @copyright 2005 Evgeny Stepanischev
- * @license http://www.php.net/license/3_0.txt PHP License 3.0
- * @version CVS: $Id:$
- * @link http://pear.php.net/package/System_SharedMemory
- */
-
- /**
- *
- * The methods PEAR SharedMemory uses to interact with plain file
- * for interacting with shared memory via plain files
- *
- * These methods overload the ones declared System_SharedMemory_Common
- *
- * @category System
- * @package System_Sharedmemory
- * @package System_Sharedmemory
- * @author Evgeny Stepanischev <bolk@lixil.ru>
- * @copyright 2005 Evgeny Stepanischev
- * @license http://www.php.net/license/3_0.txt PHP License 3.0
- * @version CVS: $Id:$
- * @link http://pear.php.net/package/System_SharedMemory
- */
-
-
- require_once 'System/SharedMemory/Common.php';
- require_once "PEAR.php";
-
- // {{{ class System_SharedMemory
-
- class System_SharedMemory_File extends System_SharedMemory_Common
- {
- // {{{ properties
- /**
- * Contains internal options
- *
- * @var string
- *
- * @access private
- */
- var $_options;
-
- /**
- * true if plugin was connected to backend
- *
- * @var bool
- *
- * @access private
- */
- var $_connected;
- // }}}
- // {{{ constructor
-
- /**
- * Constructor. Init all variables.
- *
- * @param array $options
- *
- * @access public
- */
- function System_SharedMemory_File($options)
- {
- $this->_options = $this->_default($options, array
- (
- 'tmp' => '/tmp',
- ));
-
- $this->_connected = is_writeable($this->_options['tmp']) && is_dir($this->_options['tmp']);
- }
- // }}}
- // {{{ isConnected()
-
- /**
- * returns true if plugin was
- * successfully connected to backend
- *
- * @return bool true if connected
- * @access public
- */
- function isConnected()
- {
- return $this->_connected;
- }
- // }}}
- // {{{ get()
-
- /**
- * returns value of variable in shared mem
- *
- * @param string $name name of the variable
- * @param string $value value of the variable
- *
- * @return mixed true on success or PEAR_error on fail
- * @access public
- */
- function get($name)
- {
- $name = $this->_options['tmp'].'/smf_'.md5($name);
-
- if (!file_exists($name)) {
- return array();
- }
-
- $fp = fopen($name, 'rb');
- if (is_resource($fp)) {
- flock ($fp, LOCK_SH);
-
- $str = fread($fp, filesize($name));
- fclose($fp);
- return $str == '' ? array() : unserialize($str);
- }
-
- return PEAR::raiseError('Cannot open file.', 1);
- }
- // }}}
- // {{{ set()
-
- /**
- * set value of variable in shared mem
- *
- * @param string $name name of the variable
- * @param string $value value of the variable
- *
- * @return mixed true on success or PEAR_error on fail
- * @access public
- */
- function set($name, $value)
- {
- $fp = fopen($this->_options['tmp'].'/smf_'.md5($name), 'ab');
- if (is_resource($fp)) {
- flock ($fp, LOCK_EX);
- ftruncate($fp, 0);
- fseek($fp, 0);
-
- fwrite($fp, serialize($value));
- fclose($fp);
- clearstatcache();
- return true;
- }
-
- return PEAR::raiseError('Cannot write to file.', 2);
- }
- // }}}
- // {{{ rm()
-
- /**
- * remove variable from memory
- *
- * @param string $name name of the variable
- *
- * @return mixed true on success or PEAR_error on fail
- * @access public
- */
- function rm($name)
- {
- $name = $this->_options['tmp'].'/smf_'.md5($name);
-
- if (file_exists($name)) {
- unlink($name);
- }
- }
- // }}}
-
- }
- // }}}
- ?>