function TwigPhpStorageCache::generateKey

File

core/lib/Drupal/Core/Template/TwigPhpStorageCache.php, line 76

Class

TwigPhpStorageCache

Provides an alternate cache storage for Twig using PhpStorage.

Namespace

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;
}