<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
namespace phpbb\cache\driver;
abstract class base implements \phpbb\cache\driver\driver_interface
{
var $vars = array();
var $is_modified = false;
var $sql_rowset = array();
var $sql_row_pointer = array();
var $cache_dir = '';
/**
* {@inheritDoc}
*/
function purge()
{
// Purge all phpbb cache files
try
{
$iterator = new \DirectoryIterator($this->cache_dir);
}
catch (\Exception $e)
{
return;
}
foreach ($iterator as $fileInfo)
{
if ($fileInfo->isDot())
{
continue;
}
$filename = $fileInfo->getFilename();
if ($fileInfo->isDir())
{
$this->remove_dir($fileInfo->getPathname());
}
else if (strpos($filename, 'container_') === 0 ||
strpos($filename, 'autoload_') === 0 ||
strpos($filename, 'url_matcher') === 0 ||
strpos($filename, 'url_generator') === 0 ||
strpos($filename, 'sql_') === 0 ||
strpos($filename, 'data_') === 0)
{
$this->remove_file($fileInfo->getPathname());
}
}
unset($this->vars);
unset($this->sql_rowset);
unset($this->sql_row_pointer);
if (function_exists('opcache_reset'))
{
@opcache_reset();
}
$this->vars = array();
$this->sql_rowset = array();
$this->sql_row_pointer = array();
$this->is_modified = false;
}
/**
* {@inheritDoc}
*/
function unload()
{
$this->save();
unset($this->vars);
unset($this->sql_rowset);
unset($this->sql_row_pointer);
$this->vars = array();
$this->sql_rowset = array();
$this->sql_row_pointer = array();
}
/**
* {@inheritDoc}
*/
function sql_load($query)
{
// Remove extra spaces and tabs
$query = preg_replace('/[\n\r\s\t]+/', ' ', $query);
$query_id = md5($query);
if (($result = $this->_read('sql_' . $query_id)) === false)
{
return false;
}
$this->sql_rowset[$query_id] = $result;
$this->sql_row_pointer[$query_id] = 0;
return $query_id;
}
/**
* {@inheritDoc}
*/
function sql_exists($query_id)
{
return isset($this->sql_rowset[$query_id]);
}
/**
* {@inheritDoc}
*/
function sql_fetchrow($query_id)
{
if ($this->sql_row_pointer[$query_id] < count($this->sql_rowset[$query_id]))
{
return $this->sql_rowset[$query_id][$this->sql_row_pointer[$query_id]++];
}
return false;
}
/**
* {@inheritDoc}
*/
function sql_fetchfield($query_id, $field)
{
if ($this->sql_row_pointer[$query_id] < count($this->sql_rowset[$query_id]))
{
return (isset($this->sql_rowset[$query_id][$this->sql_row_pointer[$query_id]][$field])) ? $this->sql_rowset[$query_id][$this->sql_row_pointer[$query_id]++][$field] : false;
}
return false;
}
/**
* {@inheritDoc}
*/
function sql_rowseek($rownum, $query_id)
{
if ($rownum >= count($this->sql_rowset[$query_id]))
{
return false;
}
$this->sql_row_pointer[$query_id] = $rownum;
return true;
}
/**
* {@inheritDoc}
*/
function sql_freeresult($query_id)
{
if (!isset($this->sql_rowset[$query_id]))
{
return false;
}
unset($this->sql_rowset[$query_id]);
unset($this->sql_row_pointer[$query_id]);
return true;
}
/**
* Removes/unlinks file
*
* @param string $filename Filename to remove
* @param bool $check Check file permissions
* @return bool True if the file was successfully removed, otherwise false
*/
function remove_file($filename, $check = false)
{
global $phpbb_filesystem;
if ($check && !$phpbb_filesystem->is_writable($this->cache_dir))
{
// E_USER_ERROR - not using language entry - intended.
trigger_error('Unable to remove files within ' . $this->cache_dir . '. Please check directory permissions.', E_USER_ERROR);
}
return @unlink($filename);
}
/**
* Remove directory
*
* @param string $dir Directory to remove
*
* @return null
*/
protected function remove_dir($dir)
{
try
{
$iterator = new \DirectoryIterator($dir);
}
catch (\Exception $e)
{
return;
}
foreach ($iterator as $fileInfo)
{
if ($fileInfo->isDot())
{
continue;
}
if ($fileInfo->isDir())
{
$this->remove_dir($fileInfo->getPathname());
}
else
{
$this->remove_file($fileInfo->getPathname());
}
}
@rmdir($dir);
}
}