PHP读取配置文件类实例(可读取ini,yaml,xml等)
这篇文章主要介绍了PHP读取配置文件类,可读取ini,yaml,xml等配置文件,具有一定参考借鉴价值,需要的朋友可以参考下,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<a href="http://spyc.sourceforge.net//">
- /</a>**
- 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') . '';
- */
1. ini有点过时??
2. xml比较好,
3. yaml很好,但是毕竟没有标准化。
4. txt要自己组织格式,开放性不好。
5. 类序列化。比较好,但是不熟悉的人使用比较麻烦!
6. php定义常量(你不用修改数据吗?)
所以:xml最好。
希望本文所述对大家的php程序设计有所帮助。