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   1  <?php
   2  
   3  /*
   4   * This file is part of Twig.
   5   *
   6   * (c) Fabien Potencier
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Twig\Cache;
  13  
  14  /**
  15   * Implements a cache on the filesystem.
  16   *
  17   * @author Andrew Tch <andrew@noop.lv>
  18   */
  19  class FilesystemCache implements CacheInterface
  20  {
  21      public const FORCE_BYTECODE_INVALIDATION = 1;
  22  
  23      private $directory;
  24      private $options;
  25  
  26      /**
  27       * @param string $directory The root cache directory
  28       * @param int    $options   A set of options
  29       */
  30      public function __construct($directory, $options = 0)
  31      {
  32          $this->directory = rtrim($directory, '\/').'/';
  33          $this->options = $options;
  34      }
  35  
  36      public function generateKey($name, $className)
  37      {
  38          $hash = hash(\PHP_VERSION_ID < 80100 ? 'sha256' : 'xxh128', $className);
  39  
  40          return $this->directory.$hash[0].$hash[1].'/'.$hash.'.php';
  41      }
  42  
  43      public function load($key)
  44      {
  45          if (file_exists($key)) {
  46              @include_once $key;
  47          }
  48      }
  49  
  50      public function write($key, $content)
  51      {
  52          $dir = \dirname($key);
  53          if (!is_dir($dir)) {
  54              if (false === @mkdir($dir, 0777, true)) {
  55                  clearstatcache(true, $dir);
  56                  if (!is_dir($dir)) {
  57                      throw new \RuntimeException(sprintf('Unable to create the cache directory (%s).', $dir));
  58                  }
  59              }
  60          } elseif (!is_writable($dir)) {
  61              throw new \RuntimeException(sprintf('Unable to write in the cache directory (%s).', $dir));
  62          }
  63  
  64          $tmpFile = tempnam($dir, basename($key));
  65          if (false !== @file_put_contents($tmpFile, $content) && @rename($tmpFile, $key)) {
  66              @chmod($key, 0666 & ~umask());
  67  
  68              if (self::FORCE_BYTECODE_INVALIDATION == ($this->options & self::FORCE_BYTECODE_INVALIDATION)) {
  69                  // Compile cached file into bytecode cache
  70                  if (\function_exists('opcache_invalidate') && filter_var(ini_get('opcache.enable'), \FILTER_VALIDATE_BOOLEAN)) {
  71                      @opcache_invalidate($key, true);
  72                  } elseif (\function_exists('apc_compile_file')) {
  73                      apc_compile_file($key);
  74                  }
  75              }
  76  
  77              return;
  78          }
  79  
  80          throw new \RuntimeException(sprintf('Failed to write cache file "%s".', $key));
  81      }
  82  
  83      public function getTimestamp($key)
  84      {
  85          if (!file_exists($key)) {
  86              return 0;
  87          }
  88  
  89          return (int) @filemtime($key);
  90      }
  91  }
  92  
  93  class_alias('Twig\Cache\FilesystemCache', 'Twig_Cache_Filesystem');