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<?php
/* Copyright (c) 2012, Geert Bergman (geert@scrivo.nl)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of "Scrivo" nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* $Id: Session.php 708 2013-07-02 11:59:37Z geert $
*/
/**
* Implementation of the \Scrivo\Session class.
*/
namespace Scrivo;
/**
* The Scrivo Session class is a lightweight container for session variables.
* It should enable you to create a section in to session variable space to
* store a set of session variables and to enable you to destroy the complete
* set at once.
*
* <?php
* // script1.php
* $session = new \Scrivo\Session("My_session");
* $session->userId = 32;
* header("Location: script2.php");
* ?>
*
* <?php
* // script2.php
* $session = new \Scrivo\Session("My_session");
* echo $session->userId;
* ?>
*/
class Session {
/**
* The name of the section.
* @var string
*/
private $section = "Scrivo";
/**
* Construct a session, either using the default session name: "Scrivo" or
* using your own name.
*
* @param string $section
*/
public function __construct($section=null) {
if ($section) {
$this->section = $section;
}
if (!isset($_SESSION[$this->section])) {
$_SESSION[$this->section] = array();
}
}
/**
* Implementation of the writable properties using the PHP magic
* method __set().
*
* @param string $name The name of the property to set.
* @param mixed $value The value of the property to set.
*/
public function __set($name, $value) {
$_SESSION[$this->section][$name] = $value;
}
/**
* Property access to a session variable.
*
* @param string $name The session variable name.
* @return mixed The value of the session variable.
* @throws \Scrivo\SystemException if the variable does not exists.
*/
public function __get($name) {
if ($this->__isset($name)) {
return $_SESSION[$this->section][$name];
}
throw new \Scrivo\SystemException("Invalid session variable $name");
}
/**
* Check if a session variable was set.
*
* @param string $name The session variable name.
*/
public function __isset($name) {
return isset($_SESSION[$this->section][$name]);
}
/**
* Unset/delete a session variable.
*
* @param string $name The session variable name.
*/
public function __unset($name) {
unset($_SESSION[$this->section][$name]);
}
/**
* Destroy the session and all its variables.
*/
public function destroy() {
$_SESSION[$this->section] = array();
}
}