Search\Model\Filter\Like::_formatWildcards PHP Метод

    protected function _formatWildcards($value)
    {
        $from = $to = $substFrom = $substTo = [];
        if ($this->config('wildcardAny') !== '%') {
            $from[] = '%';
            $to[] = '\\%';
            $substFrom[] = $this->config('wildcardAny');
            $substTo[] = '%';
        }
        if ($this->config('wildcardOne') !== '_') {
            $from[] = '_';
            $to[] = '\\_';
            $substFrom[] = $this->config('wildcardOne');
            $substTo[] = '_';
        }
        if ($from) {
            // Escape first
            $value = str_replace($from, $to, $value);
            // Replace wildcards
            $value = str_replace($substFrom, $substTo, $value);
        }
        return $value;
    }