public static function getIterator($pattern)
{
// sanity check pattern
if (!preg_match('/^(.).+\\1[a-zA-Z]*$/', $pattern)) {
throw new Exception('Cache iterator pattern doesn\'t appear to have matching delimiters');
}
// modify pattern to insert key prefix and isolate matches to this site
$prefixPattern = preg_quote(static::getKeyPrefix());
if ($pattern[1] == '^') {
$pattern = substr_replace($pattern, $prefixPattern, 2, 0);
} else {
$pattern = substr_replace($pattern, '^' . $prefixPattern . '.*', 1, 0);
}
return CacheIterator::createFromPattern($pattern);
}
