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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Filter
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: RealPath.php 20096 2010-01-06 02:05:09Z bkarwin $
*/
/**
* @see Zend_Filter_Interface
*/
require_once 'Zend/Filter/Interface.php';
/**
* @category Zend
* @package Zend_Filter
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Filter_RealPath implements Zend_Filter_Interface
{
/**
* @var boolean $_pathExists
*/
protected $_exists = true;
/**
* Class constructor
*
* @param boolean|Zend_Config $options Options to set
*/
public function __construct($options = true)
{
$this->setExists($options);
}
/**
* Returns true if the filtered path must exist
*
* @return boolean
*/
public function getExists()
{
return $this->_exists;
}
/**
* Sets if the path has to exist
* TRUE when the path must exist
* FALSE when not existing paths can be given
*
* @param boolean|Zend_Config $exists Path must exist
* @return Zend_Filter_RealPath
*/
public function setExists($exists)
{
if ($exists instanceof Zend_Config) {
$exists = $exists->toArray();
}
if (is_array($exists)) {
if (isset($exists['exists'])) {
$exists = (boolean) $exists['exists'];
}
}
$this->_exists = (boolean) $exists;
return $this;
}
/**
* Defined by Zend_Filter_Interface
*
* Returns realpath($value)
*
* @param string $value
* @return string
*/
public function filter($value)
{
$path = (string) $value;
if ($this->_exists) {
return realpath($path);
}
$realpath = @realpath($path);
if ($realpath) {
return $realpath;
}
$drive = '';
if (substr(PHP_OS, 0, 3) == 'WIN') {
$path = preg_replace('/[\\\\\/]/', DIRECTORY_SEPARATOR, $path);
if (preg_match('/([a-zA-Z]\:)(.*)/', $path, $matches)) {
list($fullMatch, $drive, $path) = $matches;
} else {
$cwd = getcwd();
$drive = substr($cwd, 0, 2);
if (substr($path, 0, 1) != DIRECTORY_SEPARATOR) {
$path = substr($cwd, 3) . DIRECTORY_SEPARATOR . $path;
}
}
} elseif (substr($path, 0, 1) != DIRECTORY_SEPARATOR) {
$path = getcwd() . DIRECTORY_SEPARATOR . $path;
}
$stack = array();
$parts = explode(DIRECTORY_SEPARATOR, $path);
foreach ($parts as $dir) {
if (strlen($dir) && $dir !== '.') {
if ($dir == '..') {
array_pop($stack);
} else {
array_push($stack, $dir);
}
}
}
return $drive . DIRECTORY_SEPARATOR . implode(DIRECTORY_SEPARATOR, $stack);
}
}
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