/**
* Get the real path (taking ".." and such into account)
*
* @param string $path Path to resolve
* @return string The resolved path
* @link http://book.cakephp.org/2.0/en/core-utility-libraries/file-folder.html#Folder::realpath
*/
public function realpath($path)
{
$path = str_replace('/', DIRECTORY_SEPARATOR, trim($path));
if (strpos($path, '..') === false) {
if (!Folder::isAbsolute($path)) {
$path = Folder::addPathElement($this->path, $path);
}
return $path;
}
$parts = explode(DIRECTORY_SEPARATOR, $path);
$newparts = array();
$newpath = '';
if ($path[0] === DIRECTORY_SEPARATOR) {
$newpath = DIRECTORY_SEPARATOR;
}
while (($part = array_shift($parts)) !== null) {
if ($part === '.' || $part === '') {
continue;
}
if ($part === '..') {
if (!empty($newparts)) {
array_pop($newparts);
continue;
}
return false;
}
$newparts[] = $part;
}
$newpath .= implode(DIRECTORY_SEPARATOR, $newparts);
return Folder::slashTerm($newpath);
}
