PHP PEAR::Config管理配置信息
Config類可以熟練地管理你的配置文件,不論它是存放在XML文件,INI文件,PHP數組或其它的數據資源中,它有以下的特性:
1.解析不同的數據格式;
2.可以熟練地處理你所使用的sections, directives, comments, blanks
3.將配置信息重新保存到你所喜歡的格式中(XML文件,INI文件,PHP數組或其它的數據資源).
最頂層對象Config_Container
它的結構:
Section:Section下面還可以包括Config_Container對象;
Directive:不包含其它的對象,但有一對類似於key-value形式的數據;
Comment:
Blank:
可以設置的數據格式為:
XML
PHParray
inifile
apache conf(.conf)
假設我們要將員工的信息保存為如下形式
<?XML version="1.0" encoding="UTF-8"?>
<Company>
<Member>
<name>jxyuhua</name>
<email>jxyuhua at yahoo.com.cn</email>
<www>http://www.b2c-battery.co.uk/</www>
</Member>
</Company>
下面開始建立它
<?PHP
require_once('Config.PHP');
$conf['storage']['driver'] = 'sql';
$conf['storage']['params']['PHPtype'] = 'MySQL';
$conf['storage']['params']['hostspec'] = 'localhost';
$conf['storage']['params']['username'] = 'mamasam';
$conf['storage']['params']['passWord'] = 'foobar';
$conf['Menu']['Laptop'] = array('ibm'=>'IBM', 'sony'=>'SONY');
$conf['Website']['UK']['b2c-battery'] = 'http://www.b2c-battery.co.uk';
$conf['Website']['UK']['global-batteries'] = 'http://www.global-batterIEs.co.uk';
$c = new Config();
$root =& $c->parseConfig($conf, 'PHParray');
$storage =& $root->getItem('section', 'storage');
//先刪除，然後增加，改變它出現的順序
$storage->removeItem();
$root->addItem($storage);
//echo '<pre>'. Htmlspecialchars($root->toString('XML', array('name' => 'Company'))) .'</pre>';
if ($c->writeConfig('D:/tmp/config.xml', 'XML', array('name' => 'Company')) === true) {
echo 'Config written into D:/tmp/config.XML';
}
?>
讀取配置文件
<?PHP
require_once("Config.PHP");
$c = new Config();
$root = & $c->parseConfig("D:/tmp/member.xml", "XML");
//你也可以從其它地方讀取配置信息如:
/**
$conf = array('DB' => array('type' => 'MySQL',
'host' => 'localhost',
'user' => 'user',
'pass' => 'pass')
);
$root =& $c->parseConfig($conf, 'PHParray', array('name' => 'conf'));
*/
if (PEAR::isError($root)) {
dIE('Error while reading configuration: ' . $root->getMessage());
}
$settings = $root->toArray();
printf('User settings: <a href="%s">%s %s</a>',
$settings['root']['Company']['Member']['www'],
$settings['root']['Company']['Member']['name'],
$settings['root']['Company']['Member']['email']
);
?>
下面來個復雜，實用一些的：
有如下的一個配置文件
<?XML version="1.0" encoding="ISO-8859-1"?>
<Company>
<Menu>
<Laptop>
<ibm>IBM</ibm>
<sony>SONY</sony>
</Laptop>
</Menu>
<Website>
<UK>
<b2c-battery>http://www.b2c-battery.co.uk</b2c-battery>
<global-batteries>http://www.global-batteries.co.uk</global-batterIEs>
</UK>
</Website>
<storage>
<driver>sql</driver>
<params>
<phptype>MySQL</PHPtype>
<hostspec>localhost</hostspec>
<username>mamasam</username>
<password>foobar</passWord>
</params>
</storage>
</Company>
首先，我們先將它保存進XML文件中：
//write.PHP
<?PHP
require_once('Config.PHP');
$conf['storage']['driver'] = 'sql';
$conf['storage']['params']['PHPtype'] = 'MySQL';
$conf['storage']['params']['hostspec'] = 'localhost';
$conf['storage']['params']['username'] = 'mamasam';
$conf['storage']['params']['passWord'] = 'foobar';
$conf['Menu']['Laptop'] = array('ibm'=>'IBM', 'sony'=>'SONY');
$conf['Website']['UK']['b2c-battery'] = 'http://www.b2c-battery.co.uk';
$conf['Website']['UK']['global-batteries'] = 'http://www.global-batterIEs.co.uk';
$c = new Config();
$root =& $c->parseConfig($conf, 'PHParray');
$storage =& $root->getItem('section', 'storage');
//先刪除，然後增加，改變它出現的順序
$storage->removeItem();
$root->addItem($storage);
//echo '<pre>'. Htmlspecialchars($root->toString('XML', array('name' => 'Company'))) .'</pre>';
if ($c->writeConfig('D:/tmp/config.xml', 'XML', array('name' => 'Company')) === true) {
echo 'Config written into D:/tmp/config.XML';
}
?>好了，接下來就是讀取這個配置文件了，假設我們只需要數據庫配置這段內容<storage>
//read.PHP
<?PHP
require_once('Config.PHP');
$c = new Config();
$root = & $c->parseConfig('D:/tmp/config.xml', 'XML');
if(PEAR::isError($root)) {
dIE($root->getMessage());
}
//讀取指定選區的信息
//我這樣讀不行，不知道是不是Config的問題，但對一個簡單的XML結構的文件是可以的，稍後會附上例子
//$storage =& $root->getItem('section', 'storage');
//因為以上的代碼不行，所以只好用一個笨辦法，這樣對大數據量的文件來說，效率不高。
//你是不是有好的解決辦法呢？不妨告訴我一下。
$content = $root->toArray();
unset($root);
$storage = $content['root']['Company']['storage'];
unset($content);
echo('<pre>');
print_r($storage);
echo('</pre>');
//這樣你就得到了一個PHP數組了，其它的操作就看你自己了。
?>
一個可以用getItem()讀取的例子，它的數據結構如下：
<?XML version="1.0" encoding="UTF-8"?>
<MySQL>
<host>localhost</host>
<user>joe</user>
<pass>secret</pass>
<db>db456</db>
</MySQL>
<?PHP
require_once("Config.PHP");
$c = new Config();
$root =& $c->parseConfig("MySQL.xml", "XML");
$mysqlSection =& $root->getItem("section", "MySQL");
$hostDirective =& $MySQLSection->getItem("directive", "host");
$userDirective =& $MySQLSection->getItem("directive", "user");
$passDirective =& $MySQLSection->getItem("directive", "pass");
$dbDirective =& $MySQLSection->getItem("directive", "db");
$user = $userDirective->getContent();
echo($user);
?>