<?php
/**
* 讀取4中配置的表信息,現支持php.ini,xml.yaml
*/
class Settings{
var $_settings = array();
/**
??? * 獲取某些設置的值
??? *
??? * @param unknown_type $var
??? * @return unknown
??? */
?????? function get($var) {
???????? $var = explode('.', $var);

???????? $result = $this->_settings;
???????? foreach ($var as $key) {
?????????????????? if (!isset($result[$key])) { return false; }

?????????????????? $result = $result[$key];
???????? }

???????? return $result;

??????? // trigger_error ('Not yet implemented', E_USER_ERROR);//引發一個錯誤
?????? }

?????? function load() {
??????????? trigger_error ('Not yet implemented', E_USER_ERROR);
?????? }

}
/**
* 針對PHP的配置,如有配置文件
* $file=
<?php
$db = array();

// Enter your database name here:
$db['name'] = 'test';

// Enter the hostname of your MySQL server:
$db['host'] = 'localhost';

?>

具體調用:
include ('settings.php'); //原始環境假設每個類為單獨的一個類名.php文件

// Load settings (PHP)
$settings = new Settings_PHP;
$settings->load('config.php');

echo 'PHP: ' . $settings->get('db.host') . '';

*
*/
Class Settings_PHP Extends Settings {
function load ($file) {
???????? if (file_exists($file) == false) { return false; }

???????? // Include file
???????? include ($file);
unset($file);?? //銷毀指定變量
$vars = get_defined_vars(); //返回所有已定義變量的列表,數組,變量包括服務器等相關變量,
//通過foreach吧$file引入的變量給添加到$_settings這個成員數組中去.
foreach ($vars as $key => $val) {
???????? if ($key == 'this') continue;

???????? $this->_settings[$key] = $val;
}

}

?

}

//////////////////////讀取INI文件,主要用到parser_ini_file函數,該函數返回一個數組,如第二個參數為true時則返回多維數組/////////////////////////////////////////
/**
* ini例子:
* [db]
name = test
host = localhost
調用例子:
$settings = new Settings_INI;
$settings->load('config.ini');
echo 'INI: ' . $settings->get('db.host') . '';

*
*/
Class Settings_INI Extends Settings {
function load ($file) {
???????? if (file_exists($file) == false) { return false; }
???????? $this->_settings = parse_ini_file ($file, true);
}
}

//////////////////////讀取XML文件,需要用到XML_PARSER//////////////////////////////////////////////////////////
/**
* XML例子:
??? <?xml version="1.0" encoding="UTF-8"?>
<settings>
???????? <db>
?????????????????? <name>test</name>
?????????????????? <host>localhost</host>
???????? </db>
</settings>
調用例子:
// Load settings (XML)
$settings = New Settings_XML;
$settings->load('config.xml');
echo 'XML: ' . $settings->get('db.host') . '';

*
*/
Class Settings_XML Extends Settings {
function load ($file) {
?????? if (file_exists($file) == false) { return false; }

?????? /**xmllib.php為PHP XML Library, version 1.2b,相關連接:http://keithdevens.com/software/phpxml
?????? xmllib.php主要特點是把一個數組轉換成一個xml或吧xml轉換成一個數組
?????? XML_unserialize:把一個xml給轉換 成一個數組
?????? XML_serialize:把一個數組轉換成一個xml
?????? 自PHP5起,simpleXML就很不錯,但還是不支持將xml轉換成數組的功能,所以xmlLIB還是很不錯的.
?????? */
?????? include ('xmllib.php');?
?????? $xml = file_get_contents($file);
?????? $data = XML_unserialize($xml);
?????? $this->_settings = $data['settings'];
}

}
//////////////////////////////////讀取YAML格式文件///////////////////////////////////////////////
/**
使用YAML必須使用到SPYC這個庫,相關鏈接在http://spyc.sourceforge.net/
YAML配置例子:
db:
?? name: test
?? host: localhost

*/
Class Settings_YAML Extends Settings {
function load ($file) {
?????? if (file_exists($file) == false) { return false; }

?????? include ('spyc.php');
?????? $this->_settings = Spyc::YAMLLoad($file);
}

}