欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  后端开发

一个非常完美的读写ini格式的PHP配置类分享_PHP

程序员文章站 2022-05-21 08:21:59
...
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 $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