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<?php
/* vim:set tabstop=8 softtabstop=8 shiftwidth=8 noexpandtab: */
/**
* Core Class
*
*
* LICENSE: GNU General Public License, version 2 (GPLv2)
* Copyright (c) 2001 - 2011 Ampache.org All Rights Reserved
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License v2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* @package Ampache
* @copyright 2001 - 2011 Ampache.org
* @license http://opensource.org/licenses/gpl-2.0 GPLv2
* @link http://www.ampache.org/
*/
/**
* Core Class
*
* This is really just a namespace class, it's full of static functions
* would be replaced by a namespace library once that exists in php
*
* @package Ampache
* @copyright 2001 - 2011 Ampache.org
* @license http://opensource.org/licenses/gpl-2.0 GPLv2
* @link http://www.ampache.org/
*/
class Core {
/**
* constructor
* This doesn't do anything
*/
private function __construct() {
return false;
} // construction
/**
* form_register
* This registers a form with a SID, inserts it into the session variables
* and then returns a string for use in the HTML form
*/
public static function form_register($name,$type='post') {
// Make ourselves a nice little sid
$sid = md5(uniqid(rand(), true));
// Register it
$_SESSION['forms'][$name] = array('sid'=>$sid,'expire'=>time() + Config::get('session_length'));
switch ($type) {
default:
case 'post':
$string = '<input type="hidden" name="form_validation" value="' . $sid . '" />';
break;
case 'get':
$string = $sid;
break;
} // end switch on type
return $string;
} // form_register
/**
* form_verify
* This takes a form name and then compares it with the posted sid, if they don't match
* then it returns false and doesn't let the person continue
*/
public static function form_verify($name,$method='post') {
switch ($method) {
case 'post':
$source = $_POST['form_validation'];
break;
case 'get':
$source = $_GET['form_validation'];
break;
case 'cookie':
$source = $_COOKIE['form_validation'];
break;
case 'request':
$source = $_REQUEST['form_validation'];
break;
}
if ($source == $_SESSION['forms'][$name]['sid'] AND $_SESSION['forms'][$name]['expire'] > time()) {
unset($_SESSION['forms'][$name]);
return true;
}
unset($_SESSION['forms'][$name]);
return false;
} // form_verify
/**
* image_dimensions
* This returns the dimensions of the passed song of the passed type
* returns an empty array if PHP-GD is not currently installed, returns
* false on error
*/
public static function image_dimensions($image_data) {
if (!function_exists('ImageCreateFromString')) { return false; }
$image = ImageCreateFromString($image_data);
if (!$image) { return false; }
$width = imagesx($image);
$height = imagesy($image);
if (!$width || !$height) { return false; }
return array('width'=>$width,'height'=>$height);
} // image_dimensions
} // Core
?>
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