PHP Read configuration file class (Php,ini,yaml,xml)

<?php class Settings {var $_settings = array ();      
        function Get ($var) {$var = explode ('. ', $var);   
        $result = $this->_settings;   
            foreach ($var as $key) {if (! isset ($result [$key])) {return false;   
        } $result = $result [$key];   
    return $result;   
    function load () {Trigger_error (' not yet implemented ', e_user_error); } class Settings_php extends Settings {function load ($file) {if file_exists ($file) = = f   
        Alse) {return false;   
        }//Include file include ($file);   
           
        Unset ($file);   
           
        Get declared variables $vars = Get_defined_vars ();   
          Add to Settings array foreach ($vars as $key => $val) {  if ($key = = ' this ') continue;   
        $this->_settings [$key] = $val; }} class Settings_ini extends Settings {function load ($file) {if File_exis   
        TS ($file) = = False) {return false;   
    $this->_settings = Parse_ini_file ($file, true); } class Settings_yaml extends Settings {function load ($file) {if file_exists ($file) = =   
        False) {return false;   
        Include (' spyc.php ');   
    $this->_settings = Spyc::yamlload ($file); } class Settings_xml extends Settings {function load ($file) {if file_exists ($file) = = f   
        Alse) {return false;   
        Include (' xmllib.php ');   
        $xml = file_get_contents ($file);   
           
      $data = Xml_unserialize ($xml);  $this->_settings = $data [' Settings '];  
 
}?> PHP/** * For PHP configuration, such as configuration file *config.php <?php $db = Array ();  
 
Enter your database name here: $db [' name '] = ' test ';  
Enter the hostname of your MySQL server: $db [' host '] = ' localhost '; ?>//Specific call: include (' settings.php ');  
The original environment assumes that each class is a separate class name. php file//Load settings (PHP) $settings = new settings_php;  
$settings->load (' config.php '); Echo ' PHP: '. $settings->get (' Db.host ').  
'';  
* */Read the INI file, mainly used to the Parser_ini_file function, the function returns an array, such as the second argument is true when the multidimensional array/** * INI Example: config.ini * [db] name = Test  
host = localhost//invocation example: $settings = new Settings_ini;  
$settings->load (' Config.ini '); Echo ' INI: '. $settings->get (' Db.host ').  
''; * * Read XML file, need to use xml_parser,xmllib.php in http://hudeyong926.iteye.com/admin/blogs/836048/** * XML Example: Config.xml <?x ML version= "1.0" encoding= "UTF-8"?> <settings> <db> <name>test</name>