cache_files_cleaner.php

См. документацию.

<?php
 
class CFileCacheCleaner
{
    private $cacheType;
    private $path;
    private $currentBase;
    private $currentPath;
    private $fileTree;
    private $rootDir;
 
    public function __construct($cacheType, $rootDir = null)
    {
        global $DB;
 
        $this->cacheType = $cacheType;
        $this->rootDir = $rootDir ?? $_SERVER["DOCUMENT_ROOT"];
 
        switch ($this->cacheType)
        {
            case "menu":
                $this->path = [
                    BX_PERSONAL_ROOT . '/managed_cache/' . $DB->type . '/menu/',
                ];
                break;
            case "managed":
                $this->path = [
                    BX_PERSONAL_ROOT . '/managed_cache/',
                    BX_PERSONAL_ROOT . '/stack_cache/',
                ];
                break;
            case "html":
                $this->path = [
                    BX_PERSONAL_ROOT . '/html_pages/',
                ];
                break;
            case "expired":
                $this->path = [
                    BX_PERSONAL_ROOT . '/cache/',
                    BX_PERSONAL_ROOT . '/managed_cache/',
                    BX_PERSONAL_ROOT . '/stack_cache/',
                ];
                break;
            default:
                $this->path = [
                    BX_PERSONAL_ROOT . '/cache/',
                    BX_PERSONAL_ROOT . '/managed_cache/',
                    BX_PERSONAL_ROOT . '/stack_cache/',
                    BX_PERSONAL_ROOT . '/html_pages/',
                ];
                break;
        }
    }
 
    public function InitPath($pathToCheck)
    {
        if ($pathToCheck <> '')
        {
            $pathToCheck = preg_replace("#[\\\\/]+#", "/", "/" . $pathToCheck);
            //Check if path does not contain any injection
            if (preg_match('#/\\.\\.#', $pathToCheck) || preg_match('#\\.\\./#', $pathToCheck))
            {
                return false;
            }
 
            $base = "";
            foreach ($this->path as $path)
            {
                if (preg_match('#^' . $path . '#', $pathToCheck))
                {
                    $base = $path;
                    break;
                }
            }
 
            if ($base <> '')
            {
                $this->currentBase = $base;
                $this->currentPath = mb_substr($pathToCheck, mb_strlen($base));
                return true;
            }
            return false;
        }
        else
        {
            $this->currentBase = $this->path[0];
            $this->currentPath = "";
            return true;
        }
    }
 
    public function Start()
    {
        if ($this->currentBase)
        {
            $this->fileTree = new CFileTree($this->rootDir . $this->currentBase);
            $this->fileTree->Start($this->currentPath);
        }
    }
 
    public function GetNextFile()
    {
        if (is_object($this->fileTree))
        {
            $file = $this->fileTree->GetNextFile();
            //Check if current cache subdirectory cleaned
            if ($file === false)
            {
                //Skip all checked bases
                $arPath = $this->path;
                while (!empty($arPath))
                {
                    $CurBase = array_shift($arPath);
                    if ($CurBase == $this->currentBase)
                    {
                        break;
                    }
                }
                //There is at least one cache directory not checked yet
                //so try to find a file inside
                while (!empty($arPath))
                {
                    $this->currentBase = array_shift($arPath);
                    $this->currentPath = "";
                    $this->fileTree = new CFileTree($this->rootDir . $this->currentBase);
                    $this->fileTree->Start($this->currentPath);
                    $file = $this->fileTree->GetNextFile();
                    if ($file !== false)
                    {
                        return $file;
                    }
                }
                return false;
            }
            return $file;
        }
        else
        {
            return false;
        }
    }
 
    public function GetFileExpiration($fileName)
    {
        if (preg_match('#^' . $this->rootDir . BX_PERSONAL_ROOT . '/html_pages/.*\\.html$#', $fileName))
        {
            return 1; // like a very old file
        }
        elseif (preg_match('#\\.~\\d+/#', $fileName)) //delayed delete files
        {
            return 1; // like a very old file
        }
        elseif (str_ends_with($fileName, ".php"))
        {
            $fd = fopen($fileName, "rb");
            if ($fd)
            {
                $header = fread($fd, 150);
                fclose($fd);
                if (preg_match("/dateexpire\s*=\s*'(\d+)'/im", $header, $match))
                {
                    return doubleval($match[1]);
                }
            }
        }
        elseif (str_ends_with($fileName, ".html"))
        {
            $fd = fopen($fileName, "rb");
            if ($fd)
            {
                $header = fread($fd, 26);
                fclose($fd);
                if (str_starts_with($header, "BX"))
                {
                    return doubleval(mb_substr($header, 14, 12));
                }
            }
        }
        return false;
    }
}