<?php

/* Revision 620
 * ALl EXAMPLE & DOCUMENT ARE ON www.phpFastCache.com
 * IF YOU FOUND A BUG, PLEASE GO THERE: http://www.codehelper.io <-- Post your issues and I will fix it.
 * Open new issue and I will fix it for you in 24 hours
 * I stopped support issues on GitHub
 */

class PhpFastCache {

  // Public OPTIONS
  // Can be set by phpFastCache::$option_name = $value|array|string
  public static $storage = "auto"; // PDO | mpdo | Auto | Files | memcache | apc | wincache | xcache
  public static $files_cleanup_after = 1; // hour | auto clean up files after this
  public static $autosize = 40; // Megabytes
  public static $path = ""; // PATH/TO/CACHE/ default will be current path
  public static $securityKey = "cache.storage"; // phpFastCache::$securityKey = "newKey";
  public static $securityHtAccess = true; // auto create .htaccess
  public static $option = array();
  public static $server = array(array("localhost", 11211)); // for MemCache
  public static $useTmpCache = false; // use for get from Tmp Memory, will be faster in checking cache on LOOP.
  public static $debugging = false; // turn true for debugging
  // NOTHING TO CHANGE FROM HERE
  private static $step_debugging = 0;
  private static $Tmp = array();
  private static $supported_api = array("pdo", "mpdo", "files", "memcache", "memcached", "apc", "xcache", "wincache");
  private static $filename = "pdo.caching";
  private static $table = "objects";
  private static $autodb = "";
  private static $multiPDO = array();
  public static $sys = array();
  private static $checked = array(
      "path" => false,
      "servers" => array(),
      "config_file" => "",
  );
  private static $objects = array(
      "memcache" => "",
      "memcached" => "",
      "pdo" => "",
  );

  private static function getOS() {
    $os = array(
        "os" => PHP_OS,
        "php" => PHP_SAPI,
        "system" => php_uname(),
        "unique" => md5(php_uname() . PHP_OS . PHP_SAPI)
    );
    return $os;
  }

  public static function systemInfo() {
    // self::startDebug(self::$sys,"Check Sys",__LINE__,__FUNCTION__);

    if (count(self::$sys) == 0) {

      // self::startDebug("Start System Info");

      self::$sys['os'] = self::getOS();

      self::$sys['errors'] = array();
      self::$sys['storage'] = "";
      self::$sys['method'] = "pdo";
      self::$sys['drivers'] = array(
          "apc" => false,
          "xcache" => false,
          "memcache" => false,
          "memcached" => false,
          "wincache" => false,
          "pdo" => false,
          "mpdo" => false,
          "files" => false,
      );

      // Check apc
      if (extension_loaded('apc') && ini_get('apc.enabled')) {
        self::$sys['drivers']['apc'] = true;
        self::$sys['storage'] = "memory";
        self::$sys['method'] = "apc";
      }

      // Check xcache
      if (extension_loaded('xcache') && function_exists("xcache_get")) {
        self::$sys['drivers']['xcache'] = true;
        self::$sys['storage'] = "memory";
        self::$sys['method'] = "xcache";
      }

      if (extension_loaded('wincache') && function_exists("wincache_ucache_set")) {
        self::$sys['drivers']['wincache'] = true;
        self::$sys['storage'] = "memory";
        self::$sys['method'] = "wincache";
      }

      // Check memcache
      if (function_exists("memcache_connect")) {
        self::$sys['drivers']['memcache'] = true;

        try {
          memcache_connect("127.0.0.1");
          self::$sys['storage'] = "memory";
          self::$sys['method'] = "memcache";
        } catch (Exception $e) {

        }
      }


      // Check memcached
      if (class_exists("memcached")) {
        self::$sys['drivers']['memcached'] = true;

        try {
          $memcached = new memcached();
          $memcached->addServer("127.0.0.1", "11211");
          self::$sys['storage'] = "memory";
          self::$sys['method'] = "memcached";
        } catch (Exception $e) {

        }
      }

      if (extension_loaded('pdo_sqlite')) {
        self::$sys['drivers']['pdo'] = true;
        self::$sys['drivers']['mpdo'] = true;
      }

      if (is_writable(self::getPath(true))) {
        self::$sys['drivers']['files'] = true;
      }

      if (self::$sys['storage'] == "") {

        if (extension_loaded('pdo_sqlite')) {
          self::$sys['storage'] = "disk";
          self::$sys['method'] = "pdo";
        }
        else {

          self::$sys['storage'] = "disk";
          self::$sys['method'] = "files";
        }
      }

      if (self::$sys['storage'] == "disk" && !is_writable(self::getPath())) {
        self::$sys['errors'][] = "Please Create & CHMOD 0777 or any Writeable Mode for " . self::getPath();
      }
    }

    // self::startDebug(self::$sys);
    return self::$sys;
  }

  // return Folder Cache PATH
  // PATH Edit by SecurityKey
  // Auto create, Chmod and Warning
  // Revision 618
  // PHP_SAPI =  apache2handler should go to tmp
  private static function isPHPModule() {
    if (PHP_SAPI == "apache2handler") {
      return true;
    }
    else {
      if (strpos(PHP_SAPI, "handler") !== false) {
        return true;
      }
    }
    return false;
  }

  // Revision 618
  // Security with .htaccess
  static function htaccessGen($path = "") {
    if (self::$securityHtAccess == true) {

      if (!file_exists($path . "/.htaccess")) {
        //   echo "write me";
        $html = "order deny, allow \r\n
deny from all \r\n
allow from 127.0.0.1";
        $f = @fopen($path . "/.htaccess", "w+");
        @fwrite($f, $html);
        @fclose($f);
      }
      else {
        //   echo "got me";
      }
    }
  }

  private static function getPath($skip_create = false) {

    if (self::$path == '') {
      // revision 618
      if (self::isPHPModule()) {
        $tmp_dir = ini_get('upload_tmp_dir') ? ini_get('upload_tmp_dir') : sys_get_temp_dir();
        self::$path = $tmp_dir;
      }
      else {
        self::$path = dirname(__FILE__);
      }
    }

    if ($skip_create == false && self::$checked['path'] == false) {
      if (!file_exists(self::$path . "/" . self::$securityKey . "/") || !is_writable(self::$path . "/" . self::$securityKey . "/")) {
        if (!file_exists(self::$path . "/" . self::$securityKey . "/")) {
          @mkdir(self::$path . "/" . self::$securityKey . "/", 0777);
        }
        if (!is_writable(self::$path . "/" . self::$securityKey . "/")) {
          @chmod(self::$path . "/" . self::$securityKey . "/", 0777);
        }
        if (!file_exists(self::$path . "/" . self::$securityKey . "/") || !is_writable(self::$path . "/" . self::$securityKey . "/")) {
          die("Sorry, Please create " . self::$path . "/" . self::$securityKey . "/ and SET Mode 0777 or any Writable Permission!");
        }
      }

      self::$checked['path'] = true;
      // Revision 618
      self::htaccessGen(self::$path . "/" . self::$securityKey . "/");
    }


    return self::$path . "/" . self::$securityKey . "/";
  }

  // return method automatic;
  // APC will be TOP, then Memcached, Memcache, PDO and Files
  public static function autoconfig($name = "") {
    // self::startDebug($name,"Check Name",__LINE__,__FUNCTION__);

    $cache = self::cacheMethod($name);
    if ($cache != "" && $cache != self::$storage && $cache != "auto") {
      return $cache;
    }

    // self::startDebug($cache,"Check Cache",__LINE__,__FUNCTION__);

    $os = self::getOS();
    // self::startDebug(self::$storage,"User Set",__LINE__,__FUNCTION__);
    if (self::$storage == "" || self::$storage == "auto") {
      // self::startDebug(self::$storage,"User Set Auto",__LINE__,__FUNCTION__);

      if (extension_loaded('apc') && ini_get('apc.enabled') && strpos(PHP_SAPI, "CGI") === false) {

        self::$sys['drivers']['apc'] = true;
        self::$sys['storage'] = "memory";
        self::$sys['method'] = "apc";

        // self::startDebug(self::$sys,"GOT APC",__LINE__,__FUNCTION__);
      }
      elseif (extension_loaded('xcache')) {
        self::$sys['drivers']['xcache'] = true;
        self::$sys['storage'] = "memory";
        self::$sys['method'] = "xcache";
        // self::startDebug(self::$sys,"GOT XCACHE",__LINE__,__FUNCTION__);
      }
      else {
        // fix PATH for existing
        $reconfig = false;
        // self::startDebug(self::getPath()."/config.".$os['unique'].".cache.ini","CHECK CONFIG FILE",__LINE__,__FUNCTION__);


        if (file_exists(self::getPath() . "/config." . $os['unique'] . ".cache.ini")) {
          $info = self::decode(file_get_contents(self::getPath() . "/config." . $os['unique'] . ".cache.ini"));

          // self::startDebug($info,"CHECK INFO",__LINE__,__FUNCTION__);

          if (!isset($info['value'])) {
            $reconfig = true;
          }
          else {
            $info = $info['value'];
            self::$sys = $info;
          }
        }
        else {

          $info = self::systemInfo();
          // self::startDebug($info,"CHECK INFO BY SYSTEM INFO",__LINE__,__FUNCTION__);
        }

        if (isset($info['os']['unique'])) {

          if ($info['os']['unique'] != $os['unique']) {
            $reconfig = true;
          }
        }
        else {
          $reconfig = true;
        }

        if (!file_exists(self::getPath() . "/config." . $os['unique'] . ".cache.ini") || $reconfig == true) {

          $info = self::systemInfo();
          self::$sys = $info;
          // self::startDebug($info,"Check Info",__LINE__,__FUNCTION__);

          try {
            $f = fopen(self::getPath() . "/config." . $os['unique'] . ".cache.ini", "w+");
            fwrite($f, self::encode($info));
            fclose($f);
          } catch (Exception $e) {
            die("Please chmod 0777 " . self::getPath() . "/config." . $os['unique'] . ".cache.ini");
          }
        }
        else {

        }
      }


      self::$storage = self::$sys['method'];
    }
    else {

      if (in_array(self::$storage, array("files", "pdo", "mpdo"))) {
        self::$sys['storage'] = "disk";
      }
      elseif (in_array(self::$storage, array("apc", "memcache", "memcached", "wincache", "xcache"))) {
        self::$sys['storage'] = "memory";
      }
      else {
        self::$sys['storage'] = "";
      }

      if (self::$sys['storage'] == "" || !in_array(self::$storage, self::$supported_api)) {
        die("Don't have this Cache " . self::$storage . " In your System! Please double check!");
      }

      self::$sys['method'] = strtolower(self::$storage);
    }

    if (self::$sys['method'] == "files") {
      $last_cleanup = self::files_get("last_cleanup_cache");
      if ($last_cleanup == null) {
        self::files_cleanup();
        self::files_set("last_cleanup_cache", @date("U"), 3600 * self::$files_cleanup_after);
      }
    }

    // self::startDebug(self::$sys,"Check RETURN SYS",__LINE__,__FUNCTION__);

    return self::$sys['method'];
  }

  private static function cacheMethod($name = "") {
    $cache = self::$storage;
    if (is_array($name)) {
      $key = array_keys($name);
      $key = $key[0];
      if (in_array($key, self::$supported_api)) {
        $cache = $key;
      }
    }
    return $cache;
  }

  public static function safename($name) {
    return strtolower(preg_replace("/[^a-zA-Z0-9_\s\.]+/", "", $name));
  }

  private static function encode($value, $time_in_second = "") {
    $value = serialize(array(
        "time" => @date("U"),
        "value" => $value,
        "endin" => $time_in_second
    ));
    return $value;
  }

  private static function decode($value) {
    $x = @unserialize($value);
    if ($x == false) {
      return $value;
    }
    else {
      return $x;
    }
  }

  /*
   * Start Public Static
   */

  public static function cleanup($option = "") {
    $api = self::autoconfig();
    self::$Tmp = array();

    switch ($api) {
      case "pdo":
        return self::pdo_cleanup($option);
        break;
      case "mpdo":
        return self::pdo_cleanup($option);
        break;
      case "files":
        return self::files_cleanup($option);
        break;
      case "memcache":
        return self::memcache_cleanup($option);
        break;
      case "memcached":
        return self::memcached_cleanup($option);
        break;
      case "wincache":
        return self::wincache_cleanup($option);
        break;
      case "apc":
        return self::apc_cleanup($option);
        break;
      case "xcache":
        return self::xcache_cleanup($option);
        break;
      default:
        return self::pdo_cleanup($option);
        break;
    }
  }

  public static function delete($name = "string|array(db->item)") {

    $api = self::autoconfig($name);
    if (self::$useTmpCache == true) {
      $tmp_name = md5(serialize($api . $name));
      if (isset(self::$Tmp[$tmp_name])) {
        unset(self::$Tmp[$tmp_name]);
      }
    }

    switch ($api) {
      case "pdo":
        return self::pdo_delete($name);
        break;
      case "mpdo":
        return self::pdo_delete($name);
        break;
      case "files":
        return self::files_delete($name);
        break;
      case "memcache":
        return self::memcache_delete($name);
        break;
      case "memcached":
        return self::memcached_delete($name);
        break;
      case "wincache":
        return self::wincache_delete($name);
        break;
      case "apc":
        return self::apc_delete($name);
        break;
      case "xcache":
        return self::xcache_delete($name);
        break;
      default:
        return self::pdo_delete($name);
        break;
    }
  }

  public static function exists($name = "string|array(db->item)") {

    $api = self::autoconfig($name);
    switch ($api) {
      case "pdo":
        return self::pdo_exist($name);
        break;
      case "mpdo":
        return self::pdo_exist($name);
        break;
      case "files":
        return self::files_exist($name);
        break;
      case "memcache":
        return self::memcache_exist($name);
        break;
      case "memcached":
        return self::memcached_exist($name);
        break;
      case "wincache":
        return self::wincache_exist($name);
        break;
      case "apc":
        return self::apc_exist($name);
        break;
      case "xcache":
        return self::xcache_exist($name);
        break;
      default:
        return self::pdo_exist($name);
        break;
    }
  }

  public static function deleteMulti($object = array()) {
    $res = array();
    foreach ($object as $driver => $name) {
      if (!is_numeric($driver)) {
        $n = $driver . "_" . $name;
        $name = array($driver => $name);
      }
      else {
        $n = $name;
      }
      $res[$n] = self::delete($name);
    }
    return $res;
  }

  public static function setMulti($mname = array(), $time_in_second_for_all = 600, $skip_for_all = false) {
    $res = array();

    foreach ($mname as $object) {
      //   print_r($object);

      $keys = array_keys($object);

      if ($keys[0] != "0") {
        $k = $keys[0];
        $name = isset($object[$k]) ? array($k => $object[$k]) : "";
        $n = $k . "_" . $object[$k];
        $x = 0;
      }
      else {
        $name = isset($object[0]) ? $object[0] : "";
        $x = 1;
        $n = $name;
      }

      $value = isset($object[$x]) ? $object[$x] : "";
      $x++;
      $time = isset($object[$x]) ? $object[$x] : $time_in_second_for_all;
      $x++;
      $skip = isset($object[$x]) ? $object[$x] : $skip_for_all;
      $x++;

      if ($name != "" && $value != "") {
        $res[$n] = self::set($name, $value, $time, $skip);
      }
      // echo "<br> ----- <br>";
    }

    return $res;
  }

  public static function set($name, $value, $time_in_second = 600, $skip_if_existing = false) {
    $api = self::autoconfig($name);
    if (self::$useTmpCache == true) {
      $tmp_name = md5(serialize($api . $name));
      self::$Tmp[$tmp_name] = $value;
    }

    switch ($api) {
      case "pdo":
        return self::pdo_set($name, $value, $time_in_second, $skip_if_existing);
        break;
      case "mpdo":
        return self::pdo_set($name, $value, $time_in_second, $skip_if_existing);
        break;
      case "files":
        return self::files_set($name, $value, $time_in_second, $skip_if_existing);
        break;
      case "memcache":
        return self::memcache_set($name, $value, $time_in_second, $skip_if_existing);
        break;
      case "memcached":
        return self::memcached_set($name, $value, $time_in_second, $skip_if_existing);
        break;
      case "wincache":
        return self::wincache_set($name, $value, $time_in_second, $skip_if_existing);
        break;
      case "apc":
        return self::apc_set($name, $value, $time_in_second, $skip_if_existing);
        break;
      case "xcache":
        return self::xcache_set($name, $value, $time_in_second, $skip_if_existing);
        break;
      default:
        return self::pdo_set($name, $value, $time_in_second, $skip_if_existing);
        break;
    }
  }

  public static function decrement($name, $step = 1) {
    $api = self::autoconfig($name);
    if (self::$useTmpCache == true) {
      $tmp_name = md5(serialize($api . $name));
      if (isset(self::$Tmp[$tmp_name])) {
        self::$Tmp[$tmp_name] = (Int) self::$Tmp[$tmp_name] - $step;
      }
      else {
        self::$Tmp[$tmp_name] = $step;
      }
    }
    switch ($api) {
      case "pdo":
        return self::pdo_decrement($name, $step);
        break;
      case "mpdo":
        return self::pdo_decrement($name, $step);
        break;
      case "files":
        return self::files_decrement($name, $step);
        break;
      case "memcache":
        return self::memcache_decrement($name, $step);
        break;
      case "memcached":
        return self::memcached_decrement($name, $step);
        break;
      case "wincache":
        return self::wincache_decrement($name, $step);
        break;
      case "apc":
        return self::apc_decrement($name, $step);
        break;
      case "xcache":
        return self::xcache_decrement($name, $step);
        break;
      default:
        return self::pdo_decrement($name, $step);
        break;
    }
  }

  public static function get($name) {
    $api = self::autoconfig($name);
    if (self::$useTmpCache == true) {
      $tmp_name = md5(serialize($api . $name));
      if (isset(self::$Tmp[$tmp_name])) {
        return self::$Tmp[$tmp_name];
      }
    }

    // self::startDebug($api,"API",__LINE__,__FUNCTION__);
    // for files, check it if NULL and "empty" string
    switch ($api) {
      case "pdo":
        return self::pdo_get($name);
        break;
      case "mpdo":
        return self::pdo_get($name);

        break;
      case "files":
        return self::files_get($name);
        break;
      case "memcache":
        return self::memcache_get($name);
        break;
      case "memcached":
        return self::memcached_get($name);
        break;
      case "wincache":
        return self::wincache_get($name);
        break;
      case "apc":
        return self::apc_get($name);
        break;
      case "xcache":
        return self::xcache_get($name);
        break;
      default:
        return self::pdo_get($name);
        break;
    }
  }

  public static function getMulti($object = array()) {
    $res = array();
    foreach ($object as $driver => $name) {
      if (!is_numeric($driver)) {
        $n = $driver . "_" . $name;
        $name = array($driver => $name);
      }
      else {
        $n = $name;
      }
      $res[$n] = self::get($name);
    }
    return $res;
  }

  public static function stats() {
    $api = self::autoconfig();
    switch ($api) {
      case "pdo":
        return self::pdo_stats();
        break;
      case "mpdo":
        return self::pdo_stats();
        break;
      case "files":
        return self::files_stats();
        break;
      case "memcache":
        return self::memcache_stats();
        break;
      case "memcached":
        return self::memcached_stats();
        break;
      case "wincache":
        return self::wincache_stats();
        break;
      case "apc":
        return self::apc_stats();
        break;
      case "xcache":
        return self::xcache_stats();
        break;
      default:
        return self::pdo_stats();
        break;
    }
  }

  public static function increment($name, $step = 1) {
    $api = self::autoconfig($name);

    if (self::$useTmpCache == true) {
      $tmp_name = md5(serialize($api . $name));
      if (isset(self::$Tmp[$tmp_name])) {
        self::$Tmp[$tmp_name] = (Int) self::$Tmp[$tmp_name] + $step;
      }
      else {
        self::$Tmp[$tmp_name] = $step;
      }
    }

    switch ($api) {
      case "pdo":
        return self::pdo_increment($name, $step);
        break;
      case "mpdo":
        return self::pdo_increment($name, $step);
        break;
      case "files":
        return self::files_increment($name, $step);
        break;
      case "memcache":
        return self::memcache_increment($name, $step);
        break;
      case "memcached":
        return self::memcached_increment($name, $step);
        break;
      case "wincache":
        return self::wincache_increment($name, $step);
        break;
      case "apc":
        return self::apc_increment($name, $step);
        break;
      case "xcache":
        return self::xcache_increment($name, $step);
        break;
      default:
        return self::pdo_increment($name, $step);
        break;
    }
  }

  /*
   * Begin FILES Cache Static
   * Use Files & Folders to cache
   */

  private static function files_exist($name) {
    $data = self::files_get($name);
    if ($data == null) {
      return false;
    }
    else {
      return true;
    }
  }

  private static function files_set($name, $value, $time_in_second = 600, $skip_if_existing = false) {

    $db = self::selectDB($name);
    $name = $db['item'];
    $folder = $db['db'];

    $path = self::getPath();
    $tmp = explode("/", $folder);
    foreach ($tmp as $dir) {
      if ($dir != "" && $dir != "." && $dir != "..") {
        $path.="/" . $dir;
        if (!file_exists($path)) {
          mkdir($path, 0777);
        }
      }
    }

    $file = $path . "/" . $name . ".c.html";

    $write = true;
    if (file_exists($file)) {
      $data = self::decode(file_get_contents($file));
      if ($skip_if_existing == true && ((Int) $data['time'] + (Int) $data['endin'] > @date("U"))) {
        $write = false;
      }
    }

    if ($write == true) {
      try {
        $f = fopen($file, "w+");
        fwrite($f, self::encode($value, $time_in_second));
        fclose($f);
      } catch (Exception $e) {
        die("Sorry, can't write cache to file :" . $file);
      }
    }

    return $value;
  }

  private static function files_get($name) {
    $db = self::selectDB($name);
    $name = $db['item'];
    $folder = $db['db'];

    $path = self::getPath();
    $tmp = explode("/", $folder);
    foreach ($tmp as $dir) {
      if ($dir != "" && $dir != "." && $dir != "..") {
        $path.="/" . $dir;
      }
    }

    $file = $path . "/" . $name . ".c.html";

    if (!file_exists($file)) {
      return null;
    }

    $data = self::decode(file_get_contents($file));

    if (!isset($data['time']) || !isset($data['endin']) || !isset($data['value'])) {
      return null;
    }

    if ($data['time'] + $data['endin'] < @date("U")) {
      // exp
      unlink($file);
      return null;
    }

    return isset($data['value']) ? $data['value'] : null;
  }

  private static function files_stats($dir = "") {
    $total = array(
        "expired" => 0,
        "size" => 0,
        "files" => 0
    );
    if ($dir == "") {
      $dir = self::getPath();
    }
    $d = opendir($dir);
    while ($file = readdir($d)) {
      if ($file != "." && $file != "..") {
        $path = $dir . "/" . $file;
        if (is_dir($path)) {
          $in = self::files_stats($path);
          $total['expired'] = $total['expired'] + $in['expired'];
          $total['size'] = $total['size'] + $in['size'];
          $total['files'] = $total['files'] + $in['files'];
        }
        elseif (strpos($path, ".c.html") !== false) {
          $data = self::decode($path);
          if (isset($data['value']) && isset($data['time']) && isset($data['endin'])) {
            $total['files'] ++;
            if ($data['time'] + $data['endin'] < @date("U")) {
              $total['expired'] ++;
            }
            $total['size'] = $total['size'] + filesize($path);
          }
        }
      }
    }
    if ($total['size'] > 0) {
      $total['size'] = $total['size'] / 1024 / 1024;
    }
    return $total;
  }

  private static function files_cleanup($dir = "") {
    $total = 0;
    if ($dir == "") {
      $dir = self::getPath();
    }
    $d = opendir($dir);
    while ($file = readdir($d)) {
      if ($file != "." && $file != "..") {
        $path = $dir . "/" . $file;
        if (is_dir($path)) {
          $total = $total + self::files_cleanup($path);
          try {
            @unlink($path);
          } catch (Exception $e) {
            // nothing;
          }
        }
        elseif (strpos($path, ".c.html") !== false) {
          $data = self::decode($path);
          if (isset($data['value']) && isset($data['time']) && isset($data['endin'])) {
            if ((Int) $data['time'] + (Int) $data['endin'] < @date("U")) {
              unlink($path);
              $total++;
            }
          }
          else {
            unlink($path);
            $total++;
          }
        }
      }
    }
    return $total;
  }

  private static function files_delete($name) {
    $db = self::selectDB($name);
    $name = $db['item'];
    $folder = $db['db'];

    $path = self::getPath();
    $tmp = explode("/", $folder);
    foreach ($tmp as $dir) {
      if ($dir != "" && $dir != "." && $dir != "..") {
        $path.="/" . $dir;
      }
    }

    $file = $path . "/" . $name . ".c.html";
    if (file_exists($file)) {
      try {
        unlink($file);
        return true;
      } catch (Exception $e) {
        return false;
      }
    }
    return true;
  }

  private static function files_increment($name, $step = 1) {
    $db = self::selectDB($name);
    $name = $db['item'];
    $folder = $db['db'];

    $path = self::getPath();
    $tmp = explode("/", $folder);
    foreach ($tmp as $dir) {
      if ($dir != "" && $dir != "." && $dir != "..") {
        $path.="/" . $dir;
      }
    }

    $file = $path . "/" . $name . ".c.html";
    if (!file_exists($file)) {
      self::files_set($name, $step, 3600);
      return $step;
    }

    $data = self::decode(file_get_contents($file));
    if (isset($data['time']) && isset($data['value']) && isset($data['endin'])) {
      $data['value'] = $data['value'] + $step;
      self::files_set($name, $data['value'], $data['endin']);
    }
    return $data['value'];
  }

  private static function files_decrement($name, $step = 1) {
    $db = self::selectDB($name);
    $name = $db['item'];
    $folder = $db['db'];

    $path = self::getPath();
    $tmp = explode("/", $folder);
    foreach ($tmp as $dir) {
      if ($dir != "" && $dir != "." && $dir != "..") {
        $path.="/" . $dir;
      }
    }

    $file = $path . "/" . $name . ".c.html";
    if (!file_exists($file)) {
      self::files_set($name, $step, 3600);
      return $step;
    }

    $data = self::decode(file_get_contents($file));
    if (isset($data['time']) && isset($data['value']) && isset($data['endin'])) {
      $data['value'] = $data['value'] - $step;
      self::files_set($name, $data['value'], $data['endin']);
    }
    return $data['value'];
  }

  private static function getMemoryName($name) {
    $db = self::selectDB($name);
    $name = $db['item'];
    $folder = $db['db'];
    $name = $folder . "_" . $name;

    // connect memory server
    if (self::$sys['method'] == "memcache" || $db['db'] == "memcache") {
      self::memcache_addserver();
    }
    elseif (self::$sys['method'] == "memcached" || $db['db'] == "memcached") {
      self::memcached_addserver();
    }
    elseif (self::$sys['method'] == "wincache") {
      // init WinCache here
    }

    return $name;
  }

  /*
   * Begin XCache Static
   * http://xcache.lighttpd.net/wiki/XcacheApi
   */

  private static function xcache_exist($name) {
    $name = self::getMemoryName($name);
    if (xcache_isset($name)) {
      return true;
    }
    else {
      return false;
    }
  }

  private static function xcache_set($name, $value, $time_in_second = 600, $skip_if_existing = false) {
    $name = self::getMemoryName($name);
    if ($skip_if_existing == true) {
      if (!self::xcache_exist($name)) {
        return xcache_set($name, $value, $time_in_second);
      }
    }
    else {
      return xcache_set($name, $value, $time_in_second);
    }
    return false;
  }

  private static function xcache_get($name) {

    $name = self::getMemoryName($name);

    $data = xcache_get($name);

    if ($data === false || $data == "") {
      return null;
    }
    return $data;
  }

  private static function xcache_stats() {
    try {
      return xcache_list(XC_TYPE_VAR, 100);
    } catch (Exception $e) {
      return array();
    }
  }

  private static function xcache_cleanup($option = array()) {
    // Revision 621

    $cnt = xcache_count(XC_TYPE_VAR);
    for ($i = 0; $i < $cnt; $i++) {
      xcache_clear_cache(XC_TYPE_VAR, $i);
    }
    return true;
  }

  private static function xcache_delete($name) {
    $name = self::getMemoryName($name);
    return xcache_unset($name);
  }

  private static function xcache_increment($name, $step = 1) {
    $orgi = $name;
    $name = self::getMemoryName($name);
    $ret = xcache_inc($name, $step);
    if ($ret === false) {
      self::xcache_set($orgi, $step, 3600);
      return $step;
    }
    else {
      return $ret;
    }
  }

  private static function xcache_decrement($name, $step = 1) {
    $orgi = $name;
    $name = self::getMemoryName($name);
    $ret = xcache_dec($name, $step);
    if ($ret === false) {
      self::xcache_set($orgi, $step, 3600);
      return $step;
    }
    else {
      return $ret;
    }
  }

  /*
   * Begin APC Static
   * http://www.php.net/manual/en/ref.apc.php
   */

  private static function apc_exist($name) {
    $name = self::getMemoryName($name);
    if (apc_exists($name)) {
      return true;
    }
    else {
      return false;
    }
  }

  private static function apc_set($name, $value, $time_in_second = 600, $skip_if_existing = false) {
    $name = self::getMemoryName($name);
    if ($skip_if_existing == true) {
      return apc_add($name, $value, $time_in_second);
    }
    else {
      return apc_store($name, $value, $time_in_second);
    }
  }

  private static function apc_get($name) {

    $name = self::getMemoryName($name);

    $data = apc_fetch($name, $bo);

    if ($bo === false) {
      return null;
    }
    return $data;
  }

  private static function apc_stats() {
    try {
      return apc_cache_info("user");
    } catch (Exception $e) {
      return array();
    }
  }

  private static function apc_cleanup($option = array()) {
    return apc_clear_cache("user");
  }

  private static function apc_delete($name) {
    $name = self::getMemoryName($name);
    return apc_delete($name);
  }

  private static function apc_increment($name, $step = 1) {
    $orgi = $name;
    $name = self::getMemoryName($name);
    $ret = apc_inc($name, $step, $fail);
    if ($ret === false) {
      self::apc_set($orgi, $step, 3600);
      return $step;
    }
    else {
      return $ret;
    }
  }

  private static function apc_decrement($name, $step = 1) {
    $orgi = $name;
    $name = self::getMemoryName($name);
    $ret = apc_dec($name, $step, $fail);
    if ($ret === false) {
      self::apc_set($orgi, $step, 3600);
      return $step;
    }
    else {
      return $ret;
    }
  }

  /*
   * Begin Memcache Static
   * http://www.php.net/manual/en/class.memcache.php
   */

  public static function memcache_addserver() {
    if (!isset(self::$checked['memcache'])) {
      self::$checked['memcache'] = array();
    }

    if (self::$objects['memcache'] == "") {
      self::$objects['memcache'] = new Memcache();

      foreach (self::$server as $server) {
        $name = isset($server[0]) ? $server[0] : "";
        $port = isset($server[1]) ? $server[1] : 11211;
        if (!in_array($server, self::$checked['memcache']) && $name != "") {
          self::$objects['memcache']->addServer($name, $port);
          self::$checked['memcache'][] = $name;
        }
      }
    }
  }

  private static function memcache_exist($name) {
    $x = self::memcache_get($name);
    if ($x == null) {
      return false;
    }
    else {
      return true;
    }
  }

  private static function memcache_set($name, $value, $time_in_second = 600, $skip_if_existing = false) {
    $orgi = $name;
    $name = self::getMemoryName($name);
    if ($skip_if_existing == false) {
      return self::$objects['memcache']->set($name, $value, false, $time_in_second);
    }
    else {
      return self::$objects['memcache']->add($name, $value, false, $time_in_second);
    }
  }

  private static function memcache_get($name) {
    $name = self::getMemoryName($name);
    $x = self::$objects['memcache']->get($name);
    if ($x == false) {
      return null;
    }
    else {
      return $x;
    }
  }

  private static function memcache_stats() {
    self::memcache_addserver();
    return self::$objects['memcache']->getStats();
  }

  private static function memcache_cleanup($option = "") {
    self::memcache_addserver();
    self::$objects['memcache']->flush();
    return true;
  }

  private static function memcache_delete($name) {
    $name = self::getMemoryName($name);
    return self::$objects['memcache']->delete($name);
  }

  private static function memcache_increment($name, $step = 1) {
    $name = self::getMemoryName($name);
    return self::$objects['memcache']->increment($name, $step);
  }

  private static function memcache_decrement($name, $step = 1) {
    $name = self::getMemoryName($name);
    return self::$objects['memcache']->decrement($name, $step);
  }

  /*
   * Begin Memcached Static
   */

  public static function memcached_addserver() {
    if (!isset(self::$checked['memcached'])) {
      self::$checked['memcached'] = array();
    }

    if (self::$objects['memcached'] == "") {
      self::$objects['memcached'] = new Memcached();

      foreach (self::$server as $server) {
        $name = isset($server[0]) ? $server[0] : "";
        $port = isset($server[1]) ? $server[1] : 11211;
        $sharing = isset($server[2]) ? $server[2] : 0;
        if (!in_array($server, self::$checked['memcached']) && $name != "") {
          if ($sharing > 0) {
            self::$objects['memcached']->addServer($name, $port, $sharing);
          }
          else {
            self::$objects['memcached']->addServer($name, $port);
          }

          self::$checked['memcached'][] = $name;
        }
      }
    }
  }

  private static function memcached_exist($name) {
    $x = self::memcached_get($name);
    if ($x == null) {
      return false;
    }
    else {
      return true;
    }
  }

  private static function memcached_set($name, $value, $time_in_second = 600, $skip_if_existing = false) {
    $orgi = $name;
    $name = self::getMemoryName($name);
    if ($skip_if_existing == false) {
      return self::$objects['memcached']->set($name, $value, time() + $time_in_second);
    }
    else {
      return self::$objects['memcached']->add($name, $value, time() + $time_in_second);
    }
  }

  private static function memcached_get($name) {
    $name = self::getMemoryName($name);
    $x = self::$objects['memcached']->get($name);
    if ($x == false) {
      return null;
    }
    else {
      return $x;
    }
  }

  private static function memcached_stats() {
    self::memcached_addserver();
    return self::$objects['memcached']->getStats();
  }

  private static function memcached_cleanup($option = "") {
    self::memcached_addserver();
    self::$objects['memcached']->flush();
    return true;
  }

  private static function memcached_delete($name) {
    $name = self::getMemoryName($name);
    return self::$objects['memcached']->delete($name);
  }

  private static function memcached_increment($name, $step = 1) {
    $name = self::getMemoryName($name);
    return self::$objects['memcached']->increment($name, $step);
  }

  private static function memcached_decrement($name, $step = 1) {
    $name = self::getMemoryName($name);
    return self::$objects['memcached']->decrement($name, $step);
  }

  /*
   * Begin WinCache Static
   */

  private static function wincache_exist($name) {
    $name = self::getMemoryName($name);
    if (wincache_ucache_exists($name)) {
      return true;
    }
    else {
      return false;
    }
  }

  private static function wincache_set($name, $value, $time_in_second = 600, $skip_if_existing = false) {
    $orgi = $name;
    $name = self::getMemoryName($name);
    if ($skip_if_existing == false) {
      return wincache_ucache_set($name, $value, $time_in_second);
    }
    else {
      return wincache_ucache_add($name, $value, $time_in_second);
    }
  }

  private static function wincache_get($name) {
    $name = self::getMemoryName($name);

    $x = wincache_ucache_get($name, $suc);

    if ($suc == false) {
      return null;
    }
    else {
      return $x;
    }
  }

  private static function wincache_stats() {
    return wincache_scache_info();
  }

  private static function wincache_cleanup($option = "") {
    wincache_ucache_clear();
    return true;
  }

  private static function wincache_delete($name) {
    $name = self::getMemoryName($name);
    return wincache_ucache_delete($name);
  }

  private static function wincache_increment($name, $step = 1) {
    $name = self::getMemoryName($name);
    return wincache_ucache_inc($name, $step);
  }

  private static function wincache_decrement($name, $step = 1) {
    $name = self::getMemoryName($name);
    return wincache_ucache_dec($name, $step);
  }

  /*
   * Begin PDO Static
   */

  private static function pdo_exist($name) {
    $db = self::selectDB($name);
    $name = $db['item'];

    $x = self::db(array('db' => $db['db']))->prepare("SELECT COUNT(*) as `total` FROM " . self::$table . " WHERE `name`=:name");

    $x->execute(array(
        ":name" => $name,
    ));

    $row = $x->fetch(PDO::FETCH_ASSOC);
    if ($row['total'] > 0) {
      return true;
    }
    else {
      return false;
    }
  }

  private static function pdo_cleanup($option = "") {
    self::db(array("skip_clean" => true))->exec("drop table if exists " . self::$table);
    self::initDatabase();
    return true;
  }

  private static function pdo_stats($full = false) {
    $res = array();
    if ($full == true) {
      $stm = self::db()->prepare("SELECT * FROM " . self::$table . "");
      $stm->execute();
      $result = $stm->fetchAll();
      $res['data'] = $result;
    }
    $stm = self::db()->prepare("SELECT COUNT(*) as `total` FROM " . self::$table . "");
    $stm->execute();
    $result = $stm->fetch();
    $res['record'] = $result['total'];
    if (self::$path != "memory") {
      $res['size'] = filesize(self::getPath() . "/" . self::$filename);
    }

    return $res;
  }

  // for PDO return DB name,
  // For Files, return Dir
  private static function selectDB($object) {
    $res = array(
        'db' => "",
        'item' => "",
    );
    if (is_array($object)) {
      $key = array_keys($object);
      $key = $key[0];
      $res['db'] = $key;
      $res['item'] = self::safename($object[$key]);
    }
    else {
      $res['item'] = self::safename($object);
    }

    if ($res['db'] == "" && self::$sys['method'] == "files") {
      $res['db'] = "files";
    }

    // for auto database
    if ($res['db'] == "" && self::$storage == "mpdo") {
      $create_table = false;
      if (!file_exists('sqlite:' . self::getPath() . '/phpfastcache.c')) {
        $create_table = true;
      }
      if (self::$autodb == "") {
        try {
          self::$autodb = new PDO('sqlite:' . self::getPath() . '/phpfastcache.c');
          self::$autodb->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        } catch (PDOexception $e) {
          die("Please CHMOD 0777 or Writable Permission for " . self::getPath());
        }
      }

      if ($create_table == true) {
        self::$autodb->exec('CREATE TABLE IF NOT EXISTS "main"."db" ("id" INTEGER PRIMARY KEY  AUTOINCREMENT  NOT NULL  UNIQUE , "item" VARCHAR NOT NULL  UNIQUE , "dbname" INTEGER NOT NULL )');
      }

      $db = self::$autodb->prepare("SELECT * FROM `db` WHERE `item`=:item");
      $db->execute(array(
          ":item" => $res['item'],
      ));
      $row = $db->fetch(PDO::FETCH_ASSOC);
      if (isset($row['dbname'])) {
        // found key
        $res['db'] = $row['dbname'];
      }
      else {
        // not key // check filesize
        if ((Int) self::$autosize < 10) {
          self::$autosize = 10;
        }
        // get last key
        $db = self::$autodb->prepare("SELECT * FROM `db` ORDER BY `id` DESC");
        $db->execute();
        $row = $db->fetch(PDO::FETCH_ASSOC);
        $dbname = isset($row['dbname']) ? $row['dbname'] : 1;
        $fsize = file_exists(self::getPath() . "/" . $dbname . ".cache") ? filesize(self::getPath() . "/" . $dbname . ".cache") : 0;
        if ($fsize > (1024 * 1024 * (Int) self::$autosize)) {
          $dbname = (Int) $dbname + 1;
        }
        try {
          $insert = self::$autodb->prepare("INSERT INTO `db` (`item`,`dbname`) VALUES(:item,:dbname)");
          $insert->execute(array(
              ":item" => $res['item'],
              ":dbname" => $dbname
          ));
        } catch (PDOexception $e) {
          die('Database Error - Check A look at self::$autodb->prepare("INSERT INTO ');
        }

        $res['db'] = $dbname;
      }
    }

    return $res;
  }

  private static function pdo_get($name) {
    $db = self::selectDB($name);
    $name = $db['item'];
    // array('db'=>$db['db'])
    // self::startDebug($db,"",__LINE__,__FUNCTION__);

    $stm = self::db(array('db' => $db['db']))->prepare("SELECT * FROM " . self::$table . " WHERE `name`='" . $name . "'");
    $stm->execute();
    $res = $stm->fetch(PDO::FETCH_ASSOC);

    if (!isset($res['value'])) {
      return null;
    }
    elseif ((Int) $res['added'] + (Int) $res['endin'] <= (Int) @date("U")) {
      return null;
    }
    else {
      // decode value on SQL;
      $data = self::decode($res['value']);
      // check if VALUE on string encode
      return isset($data['value']) ? $data['value'] : null;
    }
  }

  private static function pdo_decrement($name, $step = 1) {
    $db = self::selectDB($name);
    $name = $db['item'];
    // array('db'=>$db['db'])

    $int = self::get($name);
    try {
      $stm = self::db(array('db' => $db['db']))->prepare("UPDATE " . self::$table . " SET `value`=:new WHERE `name`=:name ");
      $stm->execute(array(
          ":new" => self::encode($int - $step),
          ":name" => $name,
      ));
    } catch (PDOexception $e) {
      die("Sorry! phpFastCache don't allow this type of value - Name: " . $name . " -> Decrement: " . $step);
    }
    return $int - $step;
  }

  private static function pdo_increment($name, $step = 1) {
    $db = self::selectDB($name);
    $name = $db['item'];
    // array('db'=>$db['db'])

    $int = self::get($name);
    // echo $int."xxx";
    try {
      $stm = self::db(array('db' => $db['db']))->prepare("UPDATE " . self::$table . " SET `value`=:new WHERE `name`=:name ");
      $stm->execute(array(
          ":new" => self::encode($int + $step),
          ":name" => $name,
      ));
    } catch (PDOexception $e) {
      die("Sorry! phpFastCache don't allow this type of value - Name: " . $name . " -> Increment: " . $step);
    }
    return $int + $step;
  }

  private static function pdo_delete($name) {
    $db = self::selectDB($name);
    $name = $db['item'];

    return self::db(array('db' => $db['db']))->exec("DELETE FROM " . self::$table . " WHERE `name`='" . $name . "'");
  }

  private static function pdo_set($name, $value, $time_in_second = 600, $skip_if_existing = false) {
    $db = self::selectDB($name);
    $name = $db['item'];
    // array('db'=>$db['db'])

    if ($skip_if_existing == true) {
      try {
        $insert = self::db(array('db' => $db['db']))->prepare("INSERT OR IGNORE INTO " . self::$table . " (name,value,added,endin) VALUES(:name,:value,:added,:endin)");
        try {
          $value = self::encode($value);
        } catch (Exception $e) {
          die("Sorry! phpFastCache don't allow this type of value - Name: " . $name);
        }

        $insert->execute(array(
            ":name" => $name,
            ":value" => $value,
            ":added" => @date("U"),
            ":endin" => (Int) $time_in_second
        ));

        return true;
      } catch (PDOexception $e) {
        return false;
      }
    }
    else {
      try {
        $insert = self::db(array('db' => $db['db']))->prepare("INSERT OR REPLACE INTO " . self::$table . " (name,value,added,endin) VALUES(:name,:value,:added,:endin)");
        try {
          $value = self::encode($value);
        } catch (Exception $e) {
          die("Sorry! phpFastCache don't allow this type of value - Name: " . $name);
        }

        $insert->execute(array(
            ":name" => $name,
            ":value" => $value,
            ":added" => @date("U"),
            ":endin" => (Int) $time_in_second
        ));

        return true;
      } catch (PDOexception $e) {
        return false;
      }
    }
  }

  private static function db($option = array()) {
    $vacuum = false;
    $dbname = isset($option['db']) ? $option['db'] : "";
    $dbname = $dbname != "" ? $dbname : self::$filename;
    if ($dbname != self::$filename) {
      $dbname = $dbname . ".cache";
    }
    // debuging
    // self::startDebug(self::$storage,"Check Storage",__LINE__,__FUNCTION__);
    $initDB = false;

    if (self::$storage == "pdo") {
      // start self PDO
      if (self::$objects['pdo'] == "") {

        //  self::$objects['pdo'] == new PDO("sqlite:".self::$path."/cachedb.sqlite");
        if (!file_exists(self::getPath() . "/" . $dbname)) {
          $initDB = true;
        }
        else {
          if (!is_writable(self::getPath() . "/" . $dbname)) {
            @chmod(self::getPath() . "/" . $dbname, 0777);
            if (!is_writable(self::getPath() . "/" . $dbname)) {
              die("Please CHMOD 0777 or any Writable Permission for " . self::getPath() . "/" . $dbname);
            }
          }
        }


        try {
          self::$objects['pdo'] = new PDO("sqlite:" . self::getPath() . "/" . $dbname);
          self::$objects['pdo']->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

          if ($initDB == true) {
            self::initDatabase();
          }

          $time = filemtime(self::getPath() . "/" . $dbname);
          if ($time + (3600 * 24) < @date("U")) {
            $vacuum = true;
          }

          // Revision 619
          // auto Vaccuum() every 48 hours
          if ($vacuum == true) {
            if (!isset($option['skip_clean'])) {
              self::$objects['pdo']->exec("DELETE FROM " . self::$table . " WHERE (`added` + `endin`) < " . @date("U"));
            }
            self::$objects['pdo']->exec('VACUUM');
          }
        } catch (PDOexception $e) {
          die("Can't connect to caching file " . self::getPath() . "/" . $dbname);
        }


        return self::$objects['pdo'];
      }
      else {
        return self::$objects['pdo'];
      }
      // end self pdo
    }
    elseif (self::$storage == "mpdo") {

      // start self PDO
      if (!isset(self::$multiPDO[$dbname])) {
        //  self::$objects['pdo'] == new PDO("sqlite:".self::$path."/cachedb.sqlite");
        if (self::$path != "memory") {
          if (!file_exists(self::getPath() . "/" . $dbname)) {
            $initDB = true;
          }
          else {
            if (!is_writable(self::getPath() . "/" . $dbname)) {
              @chmod(self::getPath() . "/" . $dbname, 0777);
              if (!is_writable(self::getPath() . "/" . $dbname)) {
                die("Please CHMOD 0777 or any Writable Permission for PATH " . self::getPath());
              }
            }
          }


          try {
            self::$multiPDO[$dbname] = new PDO("sqlite:" . self::getPath() . "/" . $dbname);
            self::$multiPDO[$dbname]->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

            if ($initDB == true) {
              self::initDatabase(self::$multiPDO[$dbname]);
            }

            $time = filemtime(self::getPath() . "/" . $dbname);
            if ($time + (3600 * 24) < @date("U")) {
              $vacuum = true;
            }

            // Revision 619
            if ($vacuum == true) {
              if (!isset($option['skip_clean'])) {
                self::$multiPDO[$dbname]->exec("DELETE FROM " . self::$table . " WHERE (`added` + `endin`) < " . @date("U"));
              }
              self::$multiPDO[$dbname]->exec('VACUUM');
            }
          } catch (PDOexception $e) {
            // Revision 619
            die("Can't connect to caching file " . self::getPath() . "/" . $dbname);
          }
        }


        return self::$multiPDO[$dbname];
      }
      else {
        return self::$multiPDO[$dbname];
      }
      // end self pdo
    }
  }

  private static function initDatabase($object = null) {
    if ($object == null) {
      self::db(array("skip_clean" => true))->exec('CREATE TABLE IF NOT EXISTS "' . self::$table . '" ("id" INTEGER PRIMARY KEY  AUTOINCREMENT  NOT NULL  UNIQUE , "name" VARCHAR UNIQUE NOT NULL  , "value" BLOB, "added" INTEGER NOT NULL  DEFAULT 0, "endin" INTEGER NOT NULL  DEFAULT 0)');
      self::db(array("skip_clean" => true))->exec('CREATE INDEX "lookup" ON "' . self::$table . '" ("added" ASC, "endin" ASC)');
      self::db(array("skip_clean" => true))->exec('VACUUM');
    }
    else {
      $object->exec('CREATE TABLE IF NOT EXISTS "' . self::$table . '" ("id" INTEGER PRIMARY KEY  AUTOINCREMENT  NOT NULL  UNIQUE , "name" VARCHAR UNIQUE NOT NULL  , "value" BLOB, "added" INTEGER NOT NULL  DEFAULT 0, "endin" INTEGER NOT NULL  DEFAULT 0)');
      $object->exec('CREATE INDEX "lookup" ON "' . self::$table . '" ("added" ASC, "endin" ASC)');
      $object->exec('VACUUM');
    }
  }

  // send all bugs to my email
  // you can replace it to your email
  // maximum 1 email per hour
  // you can use phpFastCache::bugs($title, $e) in any code
  public static function bugs($title, $e) {
    $code = md5("error_" . $title);
    $send = self::get($code);
    if ($send == null) {
      $to = "khoaofgod@yahoo.com";
      $subject = "Bugs: " . $title;
      $message = "Error Serialize:" . serialize($e);
      $from = "root@" . $_SERVER['HTTP_HOST'];
      $headers = "From:" . $from;
      @mail($to, $subject, $message, $headers);
      self::set($code, 1, 3600);
    }
  }

  // use for debug
  // public function, you can use phpFastCache::debug($e|array|string) any time in any code
  public static function debug($e, $exit = false) {
    echo "<pre>";
    print_r($e);
    echo "</pre>";
    if ($exit == true) {
      exit;
    }
  }

  public static function startDebug($value, $text = "", $line = __LINE__, $func = __FUNCTION__) {
    if (self::$debugging == true) {
      self::$step_debugging++;
      if (!is_array($value)) {
        echo "<br>" . self::$step_debugging . " => " . $line . " | " . $func . " | " . $text . " | " . $value;
      }
      else {
        echo "<br>" . self::$step_debugging . " => " . $line . " | " . $func . " | " . $text . " | ";
        print_r($value);
      }
    }
  }

}