PHP使用Redis实现Session共享的实现示例

 # 使用 redis 作为存储方案 session.save_handler = redis session.save_path = "tcp://127.0.0.1:6379" # 若设置了连接密码, 则使用如下 session.save_path = "tcp://127.0.0.1:6379?auth=密码" 

 "; $_SESSION['usertest'.rand(1,5)]=1; var_dump($_SESSION); echo "

 session_set_save_handler ( callable $open , callable $close , callable $read , callable $write , callable $destroy , callable $gc [, callable $create_sid [, callable $validate_sid [, callable $update_timestamp ]]] ) : bool # >= php5.4 session_set_save_handler ( object $sessionhandler [, bool $register_shutdown = TRUE ] ) : bool 

  * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\HttpFoundation\Session\Storage\Handler; /** * MemcacheSessionHandler. * * @author Drak  */ class MemcacheSessionHandler implements \SessionHandlerInterface { /** * @var \Memcache Memcache driver. */ private $memcache; /** * @var int Time to live in seconds */ private $ttl; /** * @var string Key prefix for shared environments. */ private $prefix; /** * Constructor. * * List of available options: * * prefix: The prefix to use for the memcache keys in order to avoid collision * * expiretime: The time to live in seconds * * @param \Memcache $memcache A \Memcache instance * @param array   $options An associative array of Memcache options * * @throws \InvalidArgumentException When unsupported options are passed */ public function __construct(\Memcache $memcache, array $options = array()) { if ($diff = array_diff(array_keys($options), array('prefix', 'expiretime'))) { throw new \InvalidArgumentException(sprintf( 'The following options are not supported "%s"', implode(', ', $diff) )); } $this->memcache = $memcache; $this->ttl = isset($options['expiretime']) ? (int) $options['expiretime'] : 86400; $this->prefix = isset($options['prefix']) ? $options['prefix'] : 'sf2s'; } /** * {@inheritdoc} */ public function open($savePath, $sessionName) { return true; } /** * {@inheritdoc} */ public function close() { return $this->memcache->close(); } /** * {@inheritdoc} */ public function read($sessionId) { return $this->memcache->get($this->prefix.$sessionId) ?: ''; } /** * {@inheritdoc} */ public function write($sessionId, $data) { return $this->memcache->set($this->prefix.$sessionId, $data, 0, time() + $this->ttl); } /** * {@inheritdoc} */ public function destroy($sessionId) { return $this->memcache->delete($this->prefix.$sessionId); } /** * {@inheritdoc} */ public function gc($maxlifetime) { // not required here because memcache will auto expire the records anyhow. return true; } /** * Return a Memcache instance * * @return \Memcache */ protected function getMemcache() { return $this->memcache; } }