/**
* Get global default prefix
*
* @param string $namespace
*
* @return string
*/
static public function getDefaultPrefix($namespace = null)
{
$ret = null;
if (!empty($GLOBALS['drupal_test_info']['test_run_id'])) {
$ret = $GLOBALS['drupal_test_info']['test_run_id'];
} else {
$prefixes = variable_get('cache_prefix', null);
if (is_string($prefixes)) {
// Variable can be a string which then considered as a default
// behavior.
$ret = $prefixes;
} else if (null !== $namespace && isset($prefixes[$namespace])) {
if (false !== $prefixes[$namespace]) {
// If entry is set and not false an explicit prefix is set
// for the bin.
$ret = $prefixes[$namespace];
} 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)) {
$ret = Redis_Client::getGlobalPrefix();
}
return $ret;
}
