Created
July 2, 2012 07:31
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Session concurrency
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<?php | |
// Native handlers | |
//ini_set('session.save_path', 'tcp://127.0.0.1:11211'); | |
//ini_set('session.save_handler', 'memcache'); | |
//ini_set('session.save_path', '127.0.0.1:11211'); | |
//ini_set('session.save_handler', 'memcached'); | |
// Custom handler | |
class FileSessionHandler | |
{ | |
private $savePath; | |
function open($savePath, $sessionName) | |
{ | |
$this->savePath = __DIR__.'/session'; | |
if (!is_dir($this->savePath)) { | |
mkdir($this->savePath, 0777); | |
} | |
return true; | |
} | |
function close() | |
{ | |
return true; | |
} | |
function read($id) | |
{ | |
return (string)@file_get_contents("$this->savePath/sess_$id"); | |
} | |
function write($id, $data) | |
{ | |
var_dump('write() start '.date('His')); | |
sleep(2); | |
$ret = file_put_contents("$this->savePath/sess_$id", $data) === false ? false : true; | |
sleep(2); | |
var_dump('write() end '.date('His')); | |
return $ret; | |
} | |
function destroy($id) | |
{ | |
$file = "$this->savePath/sess_$id"; | |
if (file_exists($file)) { | |
unlink($file); | |
} | |
return true; | |
} | |
function gc($maxlifetime) | |
{ | |
foreach (glob("$this->savePath/sess_*") as $file) { | |
if (filemtime($file) + $maxlifetime < time() && file_exists($file)) { | |
unlink($file); | |
} | |
} | |
return true; | |
} | |
} | |
$handler = new FileSessionHandler(); | |
session_set_save_handler( | |
array($handler, 'open'), | |
array($handler, 'close'), | |
array($handler, 'read'), | |
array($handler, 'write'), | |
array($handler, 'destroy'), | |
array($handler, 'gc') | |
); | |
register_shutdown_function('session_write_close'); | |
$start = session_start(); | |
var_dump('started '.date('His')); | |
var_dump(array( | |
'start' => $start, | |
'session' => $_SESSION, | |
)); | |
$key = isset($_GET['key']) ? $_GET['key'] : 'key'; | |
$data = isset($_GET['data']) ? $_GET['data'] : 'data'; | |
var_dump('set '.date('His')); | |
$_SESSION[$key] = $data; | |
var_dump('sleep '.date('His')); | |
sleep(5); | |
var_dump('sleep end '.date('His')); | |
var_dump($_SESSION); | |
var_dump('end of script '.date('His')); |
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