public function TwigPhpStorageCache::generateKey in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Template/TwigPhpStorageCache.php \Drupal\Core\Template\TwigPhpStorageCache::generateKey()

File

core/lib/Drupal/Core/Template/TwigPhpStorageCache.php, line 75

Class

TwigPhpStorageCache

Provides an alternate cache storage for Twig using PhpStorage.

Namespace

Drupal\Core\Template

Code

public function generateKey($name, $className) {
  if (strpos($name, '{# inline_template_start #}') === 0) {

    // $name is an inline template, and can have characters that are not valid
    // for a filename. $suffix is unique for each inline template so we just
    // use the generic name 'inline-template' here.
    $name = 'inline-template';
  }
  else {
    $name = basename($name);
  }

  // Windows (and some encrypted Linux systems) only support 255 characters in
  // a path. On Windows a requirements error is displayed and installation is
  // blocked if Drupal's public files path is longer than 120 characters.
  // Thus, to always be less than 255, file paths may not be more than 135
  // characters long. Using the default PHP file storage class, the Twig cache
  // file path will be 124 characters long at most, which provides a margin of
  // safety.
  $suffix = substr($name, 0, self::SUFFIX_SUBSTRING_LENGTH) . '_';
  $suffix .= substr(Crypt::hashBase64($className), 0, self::SUFFIX_SUBSTRING_LENGTH);

  // The cache prefix is what gets invalidated.
  return $this->templateCacheFilenamePrefix . '_' . $suffix;
}