protected function RedisPrefixTrait::getDefaultPrefix in Redis 8

Get global default prefix

Parameters

string $suffix:

Return value

string

1 call to RedisPrefixTrait::getDefaultPrefix()

RedisPrefixTrait::getPrefix in src/RedisPrefixTrait.php

Get prefix

File

src/RedisPrefixTrait.php, line 21

Class

RedisPrefixTrait

Namespace

Drupal\redis

Code

protected function getDefaultPrefix($suffix = NULL) {
  $ret = NULL;
  if ($test_prefix = drupal_valid_test_ua()) {
    $ret = $test_prefix;
  }
  else {
    $prefixes = Settings::get('cache_prefix', '');
    if (is_string($prefixes)) {

      // Variable can be a string which then considered as a default
      // behavior.
      $ret = $prefixes;
    }
    else {
      if (NULL !== $suffix && isset($prefixes[$suffix])) {
        if (FALSE !== $prefixes[$suffix]) {

          // If entry is set and not false an explicit prefix is set
          // for the bin.
          $ret = $prefixes[$suffix];
        }
        else {

          // If we have an explicit false it means no prefix whatever
          // is the default configuration.
          $ret = '';
        }
      }
      else {

        // Key is not set, we can safely rely on default behavior.
        if (isset($prefixes['default']) && FALSE !== $prefixes['default']) {
          $ret = $prefixes['default'];
        }
        else {

          // When default is not set or an explicit false this means
          // no prefix.
          $ret = '';
        }
      }
    }
  }
  if (empty($ret)) {

    // If no prefix is given, use the same logic as core for APCu caching.
    $ret = Settings::getApcuPrefix('redis', DRUPAL_ROOT);
  }
  return $ret;
}