MyShaarli/application/SessionManager.php

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<?php
namespace Shaarli;
/**
* Manages the server-side session
*/
class SessionManager
{
protected $session = [];
/**
* Constructor
*
* @param array $session The $_SESSION array (reference)
* @param ConfigManager $conf ConfigManager instance (reference)
*/
public function __construct(& $session, & $conf)
{
$this->session = &$session;
$this->conf = &$conf;
}
/**
* Generates a session token
*
* @return string token
*/
public function generateToken()
{
$token = sha1(uniqid('', true) .'_'. mt_rand() . $this->conf->get('credentials.salt'));
$this->session['tokens'][$token] = 1;
return $token;
}
/**
* Checks the validity of a session token, and destroys it afterwards
*
* @param string $token The token to check
*
* @return bool true if the token is valid, else false
*/
public function checkToken($token)
{
if (! isset($this->session['tokens'][$token])) {
// the token is wrong, or has already been used
return false;
}
// destroy the token to prevent future use
unset($this->session['tokens'][$token]);
return true;
}
}