Abstract.php

Go to the documentation of this file.

<?php

abstract class Zend_Session_Abstract
{
    protected static $_writable = false;

    protected static $_readable = false;

    protected static $_expiringData = array();


    const _THROW_NOT_WRITABLE_MSG = 'Zend_Session is currently marked as read-only.';


    const _THROW_NOT_READABLE_MSG = 'Zend_Session is not marked as readable.';


    protected static function _namespaceIsset($namespace, $name = null)
    {
        if (self::$_readable === false) {
            #require_once 'Zend/Session/Exception.php';
            throw new Zend_Session_Exception(self::_THROW_NOT_READABLE_MSG);
        }

        if ($name === null) {
            return ( isset($_SESSION[$namespace]) || isset(self::$_expiringData[$namespace]) );
        } else {
            return ( isset($_SESSION[$namespace][$name]) || isset(self::$_expiringData[$namespace][$name]) );
        }
    }


    protected static function _namespaceUnset($namespace, $name = null)
    {
        if (self::$_writable === false) {
            #require_once 'Zend/Session/Exception.php';
            throw new Zend_Session_Exception(self::_THROW_NOT_WRITABLE_MSG);
        }

        $name = (string) $name;

        // check to see if the api wanted to remove a var from a namespace or a namespace
        if ($name === '') {
            unset($_SESSION[$namespace]);
            unset(self::$_expiringData[$namespace]);
        } else {
            unset($_SESSION[$namespace][$name]);
            unset(self::$_expiringData[$namespace][$name]);
        }

        // if we remove the last value, remove namespace.
        if (empty($_SESSION[$namespace])) {
            unset($_SESSION[$namespace]);
        }
    }


    protected static function & _namespaceGet($namespace, $name = null)
    {
        if (self::$_readable === false) {
            #require_once 'Zend/Session/Exception.php';
            throw new Zend_Session_Exception(self::_THROW_NOT_READABLE_MSG);
        }

        if ($name === null) {
            if (isset($_SESSION[$namespace])) { // check session first for data requested
                return $_SESSION[$namespace];
            } elseif (isset(self::$_expiringData[$namespace])) { // check expiring data for data reqeusted
                return self::$_expiringData[$namespace];
            } else {
                return $_SESSION[$namespace]; // satisfy return by reference
            }
        } else {
            if (isset($_SESSION[$namespace][$name])) { // check session first
                return $_SESSION[$namespace][$name];
            } elseif (isset(self::$_expiringData[$namespace][$name])) { // check expiring data
                return self::$_expiringData[$namespace][$name];
            } else {
                return $_SESSION[$namespace][$name]; // satisfy return by reference
            }
        }
    }


    protected static function _namespaceGetAll($namespace)
    {
        $currentData  = (isset($_SESSION[$namespace]) && is_array($_SESSION[$namespace])) ?
            $_SESSION[$namespace] : array();
        $expiringData = (isset(self::$_expiringData[$namespace]) && is_array(self::$_expiringData[$namespace])) ?
            self::$_expiringData[$namespace] : array();
        return array_merge($currentData, $expiringData);
    }
}