smarty/Config_File.class.php
author Dan
Tue, 01 Jul 2008 04:16:04 -0400
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parent 0 c63de9eb7045
permissions -rw-r--r--
Added ability to gracefully fail the client if the connection to the server fails
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<?php
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/**
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 * Config_File class.
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 *
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 * @link http://smarty.php.net/
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 * @version 2.6.19
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 * @copyright Copyright: 2001-2005 New Digital Group, Inc.
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 * @author Andrei Zmievski <andrei@php.net>
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 * @access public
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 * @package Smarty
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 */
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/* $Id: Config_File.class.php 2702 2007-03-08 19:11:22Z mohrt $ */
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/**
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 * Config file reading class
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 * @package Smarty
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 */
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class Config_File {
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    /**#@+
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     * Options
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     * @var boolean
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     */
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    /**
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     * Controls whether variables with the same name overwrite each other.
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     */
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    var $overwrite        =    true;
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    /**
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     * Controls whether config values of on/true/yes and off/false/no get
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     * converted to boolean values automatically.
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     */
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    var $booleanize        =    true;
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    /**
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     * Controls whether hidden config sections/vars are read from the file.
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     */
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    var $read_hidden     =    true;
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    /**
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     * Controls whether or not to fix mac or dos formatted newlines.
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     * If set to true, \r or \r\n will be changed to \n.
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     */
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    var $fix_newlines =    true;
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    /**#@-*/
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    /** @access private */
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    var $_config_path    = "";
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    var $_config_data    = array();
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    /**#@-*/
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    /**
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     * Constructs a new config file class.
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     *
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     * @param string $config_path (optional) path to the config files
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     */
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    function Config_File($config_path = NULL)
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    {
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        if (isset($config_path))
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            $this->set_path($config_path);
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    }
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    /**
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     * Set the path where configuration files can be found.
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     *
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     * @param string $config_path path to the config files
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     */
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    function set_path($config_path)
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    {
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        if (!empty($config_path)) {
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            if (!is_string($config_path) || !file_exists($config_path) || !is_dir($config_path)) {
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                $this->_trigger_error_msg("Bad config file path '$config_path'");
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                return;
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            }
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            if(substr($config_path, -1) != DIRECTORY_SEPARATOR) {
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                $config_path .= DIRECTORY_SEPARATOR;
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            }
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            $this->_config_path = $config_path;
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        }
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    }
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    /**
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     * Retrieves config info based on the file, section, and variable name.
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     *
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     * @param string $file_name config file to get info for
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     * @param string $section_name (optional) section to get info for
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     * @param string $var_name (optional) variable to get info for
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     * @return string|array a value or array of values
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     */
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    function get($file_name, $section_name = NULL, $var_name = NULL)
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    {
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        if (empty($file_name)) {
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            $this->_trigger_error_msg('Empty config file name');
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            return;
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        } else {
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            $file_name = $this->_config_path . $file_name;
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            if (!isset($this->_config_data[$file_name]))
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                $this->load_file($file_name, false);
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        }
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        if (!empty($var_name)) {
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            if (empty($section_name)) {
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                return $this->_config_data[$file_name]["vars"][$var_name];
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            } else {
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                if(isset($this->_config_data[$file_name]["sections"][$section_name]["vars"][$var_name]))
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                    return $this->_config_data[$file_name]["sections"][$section_name]["vars"][$var_name];
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                else
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                    return array();
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            }
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        } else {
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            if (empty($section_name)) {
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                return (array)$this->_config_data[$file_name]["vars"];
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            } else {
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                if(isset($this->_config_data[$file_name]["sections"][$section_name]["vars"]))
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                    return (array)$this->_config_data[$file_name]["sections"][$section_name]["vars"];
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                else
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                    return array();
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            }
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        }
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    }
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    /**
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     * Retrieves config info based on the key.
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     *
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     * @param $file_name string config key (filename/section/var)
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     * @return string|array same as get()
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     * @uses get() retrieves information from config file and returns it
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     */
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    function &get_key($config_key)
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    {
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        list($file_name, $section_name, $var_name) = explode('/', $config_key, 3);
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        $result = &$this->get($file_name, $section_name, $var_name);
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        return $result;
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    }
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    /**
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     * Get all loaded config file names.
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     *
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     * @return array an array of loaded config file names
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     */
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    function get_file_names()
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    {
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        return array_keys($this->_config_data);
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    }
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    /**
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     * Get all section names from a loaded file.
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     *
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     * @param string $file_name config file to get section names from
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     * @return array an array of section names from the specified file
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     */
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    function get_section_names($file_name)
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    {
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        $file_name = $this->_config_path . $file_name;
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        if (!isset($this->_config_data[$file_name])) {
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            $this->_trigger_error_msg("Unknown config file '$file_name'");
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            return;
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        }
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        return array_keys($this->_config_data[$file_name]["sections"]);
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    }
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    /**
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     * Get all global or section variable names.
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     *
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     * @param string $file_name config file to get info for
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     * @param string $section_name (optional) section to get info for
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     * @return array an array of variables names from the specified file/section
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     */
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    function get_var_names($file_name, $section = NULL)
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    {
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        if (empty($file_name)) {
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            $this->_trigger_error_msg('Empty config file name');
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            return;
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        } else if (!isset($this->_config_data[$file_name])) {
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            $this->_trigger_error_msg("Unknown config file '$file_name'");
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            return;
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        }
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        if (empty($section))
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            return array_keys($this->_config_data[$file_name]["vars"]);
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        else
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            return array_keys($this->_config_data[$file_name]["sections"][$section]["vars"]);
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    }
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    /**
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     * Clear loaded config data for a certain file or all files.
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     *
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     * @param string $file_name file to clear config data for
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     */
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    function clear($file_name = NULL)
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    {
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        if ($file_name === NULL)
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            $this->_config_data = array();
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        else if (isset($this->_config_data[$file_name]))
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            $this->_config_data[$file_name] = array();
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    }
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    /**
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     * Load a configuration file manually.
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     *
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     * @param string $file_name file name to load
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     * @param boolean $prepend_path whether current config path should be
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     *                              prepended to the filename
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     */
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    function load_file($file_name, $prepend_path = true)
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    {
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        if ($prepend_path && $this->_config_path != "")
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            $config_file = $this->_config_path . $file_name;
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        else
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            $config_file = $file_name;
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        ini_set('track_errors', true);
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        $fp = @fopen($config_file, "r");
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        if (!is_resource($fp)) {
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            $this->_trigger_error_msg("Could not open config file '$config_file'");
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            return false;
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        }
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        $contents = ($size = filesize($config_file)) ? fread($fp, $size) : '';
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        fclose($fp);
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        $this->_config_data[$config_file] = $this->parse_contents($contents);
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        return true;
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    }
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    /**
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     * Store the contents of a file manually.
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     *
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     * @param string $config_file file name of the related contents
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     * @param string $contents the file-contents to parse
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     */
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    function set_file_contents($config_file, $contents)
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    {
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        $this->_config_data[$config_file] = $this->parse_contents($contents);
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        return true;
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    }
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    /**
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     * parse the source of a configuration file manually.
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     *
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     * @param string $contents the file-contents to parse
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     */
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    function parse_contents($contents)
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    {
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        if($this->fix_newlines) {
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            // fix mac/dos formatted newlines
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            $contents = preg_replace('!\r\n?!', "\n", $contents);
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        }
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        $config_data = array();
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        $config_data['sections'] = array();
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        $config_data['vars'] = array();
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        /* reference to fill with data */
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        $vars =& $config_data['vars'];
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        /* parse file line by line */
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        preg_match_all('!^.*\r?\n?!m', $contents, $match);
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        $lines = $match[0];
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        for ($i=0, $count=count($lines); $i<$count; $i++) {
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            $line = $lines[$i];
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            if (empty($line)) continue;
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            if ( substr($line, 0, 1) == '[' && preg_match('!^\[(.*?)\]!', $line, $match) ) {
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                /* section found */
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                if (substr($match[1], 0, 1) == '.') {
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   291
                    /* hidden section */
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parents:
diff changeset
   292
                    if ($this->read_hidden) {
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   293
                        $section_name = substr($match[1], 1);
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   294
                    } else {
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   295
                        /* break reference to $vars to ignore hidden section */
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   296
                        unset($vars);
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   297
                        $vars = array();
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   298
                        continue;
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   299
                    }
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   300
                } else {                    
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   301
                    $section_name = $match[1];
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   302
                }
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   303
                if (!isset($config_data['sections'][$section_name]))
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   304
                    $config_data['sections'][$section_name] = array('vars' => array());
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   305
                $vars =& $config_data['sections'][$section_name]['vars'];
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   306
                continue;
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   307
            }
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   308
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   309
            if (preg_match('/^\s*(\.?\w+)\s*=\s*(.*)/s', $line, $match)) {
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   310
                /* variable found */
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   311
                $var_name = rtrim($match[1]);
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   312
                if (strpos($match[2], '"""') === 0) {
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   313
                    /* handle multiline-value */
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   314
                    $lines[$i] = substr($match[2], 3);
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   315
                    $var_value = '';
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   316
                    while ($i<$count) {
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   317
                        if (($pos = strpos($lines[$i], '"""')) === false) {
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   318
                            $var_value .= $lines[$i++];
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   319
                        } else {
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   320
                            /* end of multiline-value */
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   321
                            $var_value .= substr($lines[$i], 0, $pos);
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   322
                            break;
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   323
                        }
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   324
                    }
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   325
                    $booleanize = false;
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   326
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   327
                } else {
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   328
                    /* handle simple value */
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   329
                    $var_value = preg_replace('/^([\'"])(.*)\1$/', '\2', rtrim($match[2]));
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   330
                    $booleanize = $this->booleanize;
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   331
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   332
                }
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   333
                $this->_set_config_var($vars, $var_name, $var_value, $booleanize);
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   334
            }
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   335
            /* else unparsable line / means it is a comment / means ignore it */
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   336
        }
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   337
        return $config_data;
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   338
    }
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   339
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   340
    /**#@+ @access private */
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   341
    /**
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   342
     * @param array &$container
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   343
     * @param string $var_name
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   344
     * @param mixed $var_value
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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   345
     * @param boolean $booleanize determines whether $var_value is converted to
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   346
     *                            to true/false
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   347
     */
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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diff changeset
   348
    function _set_config_var(&$container, $var_name, $var_value, $booleanize)
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   349
    {
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   350
        if (substr($var_name, 0, 1) == '.') {
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   351
            if (!$this->read_hidden)
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   352
                return;
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   353
            else
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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diff changeset
   354
                $var_name = substr($var_name, 1);
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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diff changeset
   355
        }
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   356
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   357
        if (!preg_match("/^[a-zA-Z_]\w*$/", $var_name)) {
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   358
            $this->_trigger_error_msg("Bad variable name '$var_name'");
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
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   359
            return;
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   360
        }
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   361
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
Dan
parents:
diff changeset
   362
        if ($booleanize) {
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   363
            if (preg_match("/^(on|true|yes)$/i", $var_value))
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   364
                $var_value = true;
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   365
            else if (preg_match("/^(off|false|no)$/i", $var_value))
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   366
                $var_value = false;
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   367
        }
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   368
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   369
        if (!isset($container[$var_name]) || $this->overwrite)
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   370
            $container[$var_name] = $var_value;
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   371
        else {
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   372
            settype($container[$var_name], 'array');
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   373
            $container[$var_name][] = $var_value;
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   374
        }
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   375
    }
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   376
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   377
    /**
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   378
     * @uses trigger_error() creates a PHP warning/error
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   379
     * @param string $error_msg
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   380
     * @param integer $error_type one of
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   381
     */
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   382
    function _trigger_error_msg($error_msg, $error_type = E_USER_WARNING)
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   383
    {
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   384
        trigger_error("Config_File error: $error_msg", $error_type);
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   385
    }
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
Dan
parents:
diff changeset
   386
    /**#@-*/
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   387
}
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   388
c63de9eb7045 First commit. Basic things are working and implemented (webserver, templating, DCOP interface)
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parents:
diff changeset
   389
?>