PHP读取配置文件种(php,ini,yaml,xml)

PHP读取配置文件类(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 ) == 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'];
	}
}
?>

php

/**
* 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在http://hudeyong926.iteye.com/admin/blogs/836048

/**
* 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,相关链接在http://spyc.sourceforge.net/

/**
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。

PHP读取配置文件种(php,ini,yaml,xml)

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