source: sourcecode/system/libraries/Parser.php @ 1

<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package             CodeIgniter
 * @author              ExpressionEngine Dev Team
 * @copyright   Copyright (c) 2008 - 2011, EllisLab, Inc.
 * @license             http://codeigniter.com/user_guide/license.html
 * @link                http://codeigniter.com
 * @since               Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * Parser Class
 *
 * @package             CodeIgniter
 * @subpackage  Libraries
 * @category    Parser
 * @author              ExpressionEngine Dev Team
 * @link                http://codeigniter.com/user_guide/libraries/parser.html
 */
class CI_Parser {

        var $l_delim = '{';
        var $r_delim = '}';
        var $object;

        /**
         *  Parse a template
         *
         * Parses pseudo-variables contained in the specified template view,
         * replacing them with the data in the second param
         *
         * @access      public
         * @param       string
         * @param       array
         * @param       bool
         * @return      string
         */
        public function parse($template, $data, $return = FALSE)
        {
                $CI =& get_instance();
                $template = $CI->load->view($template, $data, TRUE);

                return $this->_parse($template, $data, $return);
        }

        // --------------------------------------------------------------------

        /**
         *  Parse a String
         *
         * Parses pseudo-variables contained in the specified string,
         * replacing them with the data in the second param
         *
         * @access      public
         * @param       string
         * @param       array
         * @param       bool
         * @return      string
         */
        function parse_string($template, $data, $return = FALSE)
        {
                return $this->_parse($template, $data, $return);
        }

        // --------------------------------------------------------------------

        /**
         *  Parse a template
         *
         * Parses pseudo-variables contained in the specified template,
         * replacing them with the data in the second param
         *
         * @access      public
         * @param       string
         * @param       array
         * @param       bool
         * @return      string
         */
        function _parse($template, $data, $return = FALSE)
        {
                if ($template == '')
                {
                        return FALSE;
                }

                foreach ($data as $key => $val)
                {
                        if (is_array($val))
                        {
                                $template = $this->_parse_pair($key, $val, $template);
                        }
                        else
                        {
                                $template = $this->_parse_single($key, (string)$val, $template);
                        }
                }

                if ($return == FALSE)
                {
                        $CI =& get_instance();
                        $CI->output->append_output($template);
                }

                return $template;
        }

        // --------------------------------------------------------------------

        /**
         *  Set the left/right variable delimiters
         *
         * @access      public
         * @param       string
         * @param       string
         * @return      void
         */
        function set_delimiters($l = '{', $r = '}')
        {
                $this->l_delim = $l;
                $this->r_delim = $r;
        }

        // --------------------------------------------------------------------

        /**
         *  Parse a single key/value
         *
         * @access      private
         * @param       string
         * @param       string
         * @param       string
         * @return      string
         */
        function _parse_single($key, $val, $string)
        {
                return str_replace($this->l_delim.$key.$this->r_delim, $val, $string);
        }

        // --------------------------------------------------------------------

        /**
         *  Parse a tag pair
         *
         * Parses tag pairs:  {some_tag} string... {/some_tag}
         *
         * @access      private
         * @param       string
         * @param       array
         * @param       string
         * @return      string
         */
        function _parse_pair($variable, $data, $string)
        {
                if (FALSE === ($match = $this->_match_pair($string, $variable)))
                {
                        return $string;
                }

                $str = '';
                foreach ($data as $row)
                {
                        $temp = $match['1'];
                        foreach ($row as $key => $val)
                        {
                                if ( ! is_array($val))
                                {
                                        $temp = $this->_parse_single($key, $val, $temp);
                                }
                                else
                                {
                                        $temp = $this->_parse_pair($key, $val, $temp);
                                }
                        }

                        $str .= $temp;
                }

                return str_replace($match['0'], $str, $string);
        }

        // --------------------------------------------------------------------

        /**
         *  Matches a variable pair
         *
         * @access      private
         * @param       string
         * @param       string
         * @return      mixed
         */
        function _match_pair($string, $variable)
        {
                if ( ! preg_match("|" . preg_quote($this->l_delim) . $variable . preg_quote($this->r_delim) . "(.+?)". preg_quote($this->l_delim) . '/' . $variable . preg_quote($this->r_delim) . "|s", $string, $match))
                {
                        return FALSE;
                }

                return $match;
        }

}
// END Parser Class

/* End of file Parser.php */
/* Location: ./system/libraries/Parser.php */