這篇文章主要介紹了PHP讀取配置文件類,可讀取ini,yaml,xml等配置文件,具有一定參考借鑒價值,需要的朋友可以參考下
本文實例講述了PHP讀取配置文件類實例。分享給大家供大家參考。具體如下:
- <?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'];
- }
- }
- ?>
- /**
- * 針對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') . '';
- *
- */
- 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:config.ini
- *
- [db]
- name = test
- host = localhost
- //調用例子:
- $settings = new Settings_INI;
- $settings->load('config.ini');
- echo 'INI: ' . $settings->get('db.host') . '';
- */
- 讀取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') . '';
- *
- */
- 讀取YAML格式文件,使用YAML必須使用到SPYC這個庫<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有點過時??
2. xml比較好,
3. yaml很好,但是畢竟沒有標準化。
4. txt要自己組織格式,開放性不好。
5. 類序列化。比較好,但是不熟悉的人使用比較麻煩!
6. php定義常量(你不用修改數據嗎?)
所以:xml最好。
希望本文所述對大家的php程序設計有所幫助。
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