CI_Typography::_format_newlines PHP Метод

    protected function _format_newlines($str)
    {
        if ($str === '' or strpos($str, "\n") === FALSE && !in_array($this->last_block_element, $this->inner_block_required)) {
            return $str;
        }
        // Convert two consecutive newlines to paragraphs
        $str = str_replace("\n\n", "</p>\n\n<p>", $str);
        // Convert single spaces to <br /> tags
        $str = preg_replace("/([^\n])(\n)([^\n])/", '\\1<br />\\2\\3', $str);
        // Wrap the whole enchilada in enclosing paragraphs
        if ($str !== "\n") {
            // We trim off the right-side new line so that the closing </p> tag
            // will be positioned immediately following the string, matching
            // the behavior of the opening <p> tag
            $str = '<p>' . rtrim($str) . '</p>';
        }
        // Remove empty paragraphs if they are on the first line, as this
        // is a potential unintended consequence of the previous code
        return preg_replace('/<p><\\/p>(.*)/', '\\1', $str, 1);
    }