PHP读取配置文件类实例(可读取ini,yaml,xml等)

本文实例讲述了PHP读取配置文件类实例。分享给大家供大家参考。具体如下：

<?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 ( $file ) == false) {   return false;  }  // Include file  include ($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_exists ( $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 ) == false) {   return false;  }  include ('xmllib.php');  $xml = file_get_contents ( $file );  $data = XML_unserialize ( $xml );  $this->_settings = $data ['settings'];  } } ?> 

/** * 针对PHP的配置,如有配置文件 *config.php <?php $db = array(); // Enter your database name here: $db['name'] = 'test'; // Enter the hostname of your MySQL server: $db['host'] = 'localhost'; ?> //具体调用: include ('settings.php'); //原始环境假设每个类为单独的一个类名.php文件 // Load settings (PHP) $settings = new Settings_PHP; $settings->load('config.php'); echo 'PHP: ' . $settings->get('db.host') . ''; * */  读取INI文件,主要用到parser_ini_file函数,该函数返回一个数组,如第二个参数为true时则返回多维数组/** * ini例子:config.ini * [db] name = test host = localhost //调用例子: $settings = new Settings_INI; $settings->load('config.ini'); echo 'INI: ' . $settings->get('db.host') . ''; */  读取XML文件,需要用到XML_PARSER，xmllib.php/** * XML例子:config.xml <?xml version="1.0" encoding="UTF-8"?> <settings> <db>  <name>test</name>  <host>localhost</host> </db> </settings> // Load settings (XML) $settings = New Settings_XML; $settings->load('config.xml'); echo 'XML: ' . $settings->get('db.host') . ''; * */  读取YAML格式文件,使用YAML必须使用到SPYC这个库/** YAML配置例子:config.yaml db:  name: test  host: localhost // Load settings (YAML) $settings = New Settings_YAML; $settings->load('config.yaml'); echo 'YAML: ' . $settings->get('db.host') . ''; */