XConfig

Version 2.0.2 The XConfig library is used to easily build a config object based on a descriptor file.

Change History

v2.0.2: - Error corrected on static NEWLINE string

v2.0.1: - Some errors corrected in Iterator (was stopped if there was a false value in the parameter) - constructor and merge method enhanced

v2.0.0: - Now compatible with PHP7 - Now uses namespace xconfig

v1.1.0: - Compiler now accept ';' as comment - Better compiler, respect '=' after first occurence as value - Compiler now converts 'true', 'yes', 'on' to true and 'false', 'no', 'off', 'none' to false

v1.0.2: - Default values added - __print function made to print better the variables - manual more complete

v1.0.1: - Original release

User guide

The configuration file have the following syntax for example:

# this file is named myconfig.conf, used in following examples
# the # denotes a comment.
; is also a comment
parameter1=value1
parameter2=value2
parameter2=value3

As version 1.1, xconfig now accept true, on, yes as a boolean 'true' and false, off, no, none as a boolean 'false'. For instance, that means parameter=off is now a boolean false, and parameter=yes is now a boolean true.

Before verion 1.0, note the config file is always read as a STRING. That means parameter=0, parameter=false, parameter=123 will be caught as "0", "false", "123", not integers or booleans

This will be converted into the XConfig object. The XConfig object is easily usable as:

$config = new XConfig('String of the config file');

or

$config = new XConfig(Array of parameters);

Concrete Example 1:

include_once 'include/xconfig/XConfig.class.php');
$config = new XConfig(file_get_contents('myconfig.conf'));

Concrete Example 2:

include_once 'include/xconfig/XConfig.class.php');
$config = new XConfig(array(
    'parameter1' => 'value1',
    'parameter2' => array('value2', 'value3')
  ));

Once you have an instance of your configuration, you may use it like this:

// assign a local variable
$param1 = $config->parameter1;
echo $param1 . '<br />';

// use directly the variable
foreach($config->parameter2 as $p)
  echo $p . '<br />';

// set a new parameter
$config->parameter3 = 'value3';

// iterate the config
foreach($config as $parameter => $value)
  echo $parameter . ' = ' . $value . '<br />';

Advanced topic

Default values:

You may pass an array of default values to the constructor so if the parameter is not present into the config file, it will take the default value. Note: default values will be taken only if the parameter DOES NOT EXIST into the config file. This means an empty value is considerated as a value

Something like this: parameter1= will not fire the default value because the parameter is present into the config file

You may encapsulate the config object into a specific personal object with a local default set of parameters.

Example:

class myConfig extends XConfig { private $default = array(

'parameter1' => 'default1'

);

public function __construct($data) {

parent::__construct($data, $this->default);

} }

Merging:

You may merge two config file (or more), for example when you have a master config file and a local replacement values config file:

include_once 'include/xconfig/XConfig.class.php');
$globalconfig = new XConfig(file_get_contents('myglobalconfig.conf'));
$localconfig = new XConfig(file_get_contents('mylocalconfig.conf'));
$globalconfig->merge($localconfig);

with files:

#global config:
ip=127.0.0.1
port=80
domain=test.com

#local config:
port=8080
title=Welcome

The result config after merging local into global will be:

ip=127.0.0.1
port=8080
domain=test.com
title=Welcome