Cake\ElasticSearch\FilterBuilder::regexp PHP Method

### Example: {{{ $builder->regexp('name.first', 'ma.*'); }}}

See also: http://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-regexp-filter.html

public regexp ( string $field, string $regexp, array $options = [] ) : Elastica\Filter\Regexp
$field	string	The field to filter by.
$regexp	string	The regular expression.
$options	array	Regultar expression flags or options.
return	Elastica\Filter\Regexp

    public function regexp($field, $regexp, array $options = [])
    {
        return new Filter\Regexp($field, $regexp, $options);
    }

FilterBuilder