分享一个完善的读写ini格式的PHP配置类

分类：PHP_Python| 发布：佚名| 查看： | 发表时间：2015/8/10

基本满足所有配置相关的需求。/**

* 解析.ini格式的配置文件为一个树形结构的对象

* 配置文件不同section通过冒号继承

* 默认根据hostname确定使用的section，如果不能确定就优先使用production

* 检测环境的时候总是优先检测production，其余section按定义顺序检测

*

* @author ares@phpdr.net

*

*/

class Config {

/**

* 解析后的配置文件

*

* @var stdClass

*/

private $config;

/**

* 一个二维数组，键是配置文件的section

* 值是一个数组或回调函数

* 如果是数组则计算hostname是否在数组中决定是否使用该section

* 如果是回调函数通过返回值true或false来确定是否使用该section

*

* @var array

*/

private $map = array ();

/**

* section会被解析，:表示继承

* 配置项中的'.'用来区分层级关系

* section中的'.'不会被解析，配置中的数组不受影响。

*

* @param string $conf

* @throws ErrorException

* @return stdClass

*/

function __construct($conf, $map) {

$config = $this->parseIni ( ( object ) parse_ini_string ( $conf, true ) );

if (array_key_exists ( 'production', $map )) {

$production = $map ['production'];

unset ( $map ['production'] );

$map = array_merge ( array (

'production' => $production ), $map );

} else {

throw new ErrorException ( 'production section not found in config' );

}

$section = 'production';

$hostname = gethostname ();

foreach ( $map as $k => $v ) {

if (is_array ( $v )) {

foreach ( $v as $v1 ) {

if ($v1 == $hostname) {

$section = $k;

break 2;

}

}

} elseif (is_callable ( $v )) {

if (true == call_user_func ( $v )) {

$section = $k;

break;

}

} else {

throw new ErrorException ( 'Wrong map value in ' . __CLASS__ );

}

}

$this->config = $config->$section;

}

/**

* 总是返回配置对象

*

* @return mixed

*/

function __get($key) {

if (isset ( $this->config->$key )) {

return $this->config->$key;

}

}

/**

* 切分

*

* @param stdClass $v

* @param string $k1

* @param mixed $v1

*/

private function split($v, $k1, $v1) {

$keys = explode ( '.', $k1 );

$last = array_pop ( $keys );

$node = $v;

foreach ( $keys as $v2 ) {

if (! isset ( $node->$v2 )) {

$node->$v2 = new stdClass ();

}

$node = $node->$v2;

}

$node->$last = $v1;

if (count ( $keys ) > 0) {

unset ( $v->$k1 );

}

}

/**

* parseIni

*

* @param object $conf

* @return stdClass

*/

private function parseIni($conf) {

$confObj = new stdClass ();

foreach ( $conf as $k => $v ) {

// 是section

if (is_array ( $v )) {

$confObj->$k = ( object ) $v;

foreach ( $v as $k1 => $v1 ) {

call_user_func ( array (

$this,

'split' ), $confObj->$k, $k1, $v1 );

}

} else {

call_user_func ( array (

$this,

'split' ), $confObj, $k, $v );

}

}

unset ( $conf );

// 处理继承

foreach ( $confObj as $k => $v ) {

if (false !== strpos ( $k, ':' )) {

if (0 === strpos ( $k, ':' )) {

throw new ErrorException ( 'config ' . $k . ' is invalid, ':' can't be the first char' );

} elseif (1 < substr_count ( $k, ':' )) {

throw new ErrorException ( 'config ' . $k . ' is invalid, ':' can appear only once' );

} else {

$keys = explode ( ':', $k );

if (! isset ( $confObj->$keys [1] )) {

throw new ErrorException ( 'parent section ' . $keys [1] . ' doesn't exist in config file' );

} else {

if (isset ( $confObj->$keys [0] )) {

throw new ErrorException ( 'config is invalid, ' . $keys [0] . ' and ' . $k . ' conflicts' );

} else {

$confObj->$keys [0] = $this->deepCloneR ( $confObj->$keys [1] );

$this->objectMergeR ( $confObj->$keys [0], $v );

unset ( $confObj->$k );

}

}

}

}

}

return $confObj;

}

/**

* php默认是浅克隆，函数实现深克隆

*

* @param object $obj

* @return object $obj

*/

private function deepCloneR($obj) {

$objClone = clone $obj;

foreach ( $objClone as $k => $v ) {

if (is_object ( $v )) {

$objClone->$k = $this->deepCloneR ( $v );

}

}

return $objClone;

}

/**

* 递归的合并两个对象

*

* @param unknown $obj1

* @param unknown $obj2

*/ private function objectMergeR($obj1, $obj2) {

foreach ( $obj2 as $k => $v ) {

if (is_object ( $v ) && isset ( $obj1->$k ) && is_object ( $obj1->$k )) {

$this->objectMergeR ( $obj1->$k, $v );

} else {

$obj1->$k = $v;

}

}

}

}

简单使用：$_ENV ['config'] = new Config ( file_get_contents ( __DIR__ . '/config.ini' ), array (

'development' => array (

'localhost.localdomain',

'localhost'

),

'production' => array ()

) );

配置文件示例：[product]

db.default.dsn="mysql:host=127.0.0.1;dbname=default"

db.default.username=root

db.default.password=123456

admin.username=admin

admin.password=123456

php.error_reporting=E_ALL

php.display_errors=no

php.log_errors=yes

php.error_log=APP_PATH'/resource/log/phpError.log'

php.session.save_path=APP_PATH'/resource/data/session'

[development:product]

db.test1.dsn="mysql:host=127.0.0.1;dbname=test1"

db.test1.username=root

db.test1.password=123456

php.display_errors=yes