一个递归读写ini格式的PHP配置类分享

songnuan

类代码

1. /**
   
2. * @edit http://www.lai18.com
   
3. * @author ares@phpdr.net
   
4. * @date 2015-07-14
   
5. */
   
6. class Config {
   
7. /**
   
8. * 解析后的配置文件
   
9. *
   
10. * @var stdClass
    
11. */
    
12. private $config;
    
13. /**
    
14. * 一个二维数组，键是配置文件的section
    
15. * 值是一个数组或回调函数
    
16. * 如果是数组则计算hostname是否在数组中决定是否使用该section
    
17. * 如果是回调函数通过返回值true或false来确定是否使用该section
    
18. *
    
19. * @var array
    
20. */
    
21. private $map = array ();
    
22.   
    
23. /**
    
24. * section会被解析，:表示继承
    
25. * 配置项中的'.'用来区分层级关系
    
26. * section中的'.'不会被解析，配置中的数组不受影响。
    
27. *
    
28. * @param string $conf     
    
29. * @throws ErrorException
    
30. * @return stdClass
    
31. */
    
32. function __construct($conf, $map) {
    
33. $config = $this->parseIni ( ( object ) parse_ini_string ( $conf, true ) );
    
34. if (array_key_exists ( 'production', $map )) {
    
35.   $production = $map ['production'];
    
36.   unset ( $map ['production'] );
    
37.   $map = array_merge ( array (
    
38.    'production' => $production ), $map );
    
39. } else {
    
40.   throw new ErrorException ( 'production section not found in config' );
    
41. }
    
42. $section = 'production';
    
43. $hostname = gethostname ();
    
44. foreach ( $map as $k => $v ) {
    
45.   if (is_array ( $v )) {
    
46.   foreach ( $v as $v1 ) {
    
47.    if ($v1 == $hostname) {
    
48.    $section = $k;
    
49.    break 2;
    
50.    }
    
51.   }
    
52.   } elseif (is_callable ( $v )) {
    
53.   if (true == call_user_func ( $v )) {
    
54.    $section = $k;
    
55.    break;
    
56.   }
    
57.   } else {
    
58.   throw new ErrorException ( 'Wrong map value in ' . __CLASS__ );
    
59.   }
    
60. }
    
61. $this->config = $config->$section;
    
62. }
    
63.   
    
64. /**
    
65. * 总是返回配置对象
    
66. *
    
67. * @return mixed
    
68. */
    
69. function __get($key) {
    
70. if (isset ( $this->config->$key )) {
    
71.   return $this->config->$key;
    
72. }
    
73. }
    
74.   
    
75. /**
    
76. * 切分
    
77. *
    
78. * @param stdClass $v     
    
79. * @param string $k1     
    
80. * @param mixed $v1     
    
81. */
    
82. private function split($v, $k1, $v1) {
    
83. $keys = explode ( '.', $k1 );
    
84. $last = array_pop ( $keys );
    
85. $node = $v;
    
86. foreach ( $keys as $v2 ) {
    
87.   if (! isset ( $node->$v2 )) {
    
88.   $node->$v2 = new stdClass ();
    
89.   }
    
90.   $node = $node->$v2;
    
91. }
    
92. $node->$last = $v1;
    
93. if (count ( $keys ) > 0) {
    
94.   unset ( $v->$k1 );
    
95. }
    
96. }
    
97.   
    
98. /**
    
99. * parseIni
    
100. *
     
101. * @param object $conf     
     
102. * @return stdClass
     
103. */
     
104. private function parseIni($conf) {
     
105. $confObj = new stdClass ();
     
106. foreach ( $conf as $k => $v ) {
     
107.   // 是section
     
108.   if (is_array ( $v )) {
     
109.   $confObj->$k = ( object ) $v;
     
110.   foreach ( $v as $k1 => $v1 ) {
     
111.    call_user_func ( array (
     
112.     $this,
     
113.     'split' ), $confObj->$k, $k1, $v1 );
     
114.   }
     
115.   } else {
     
116.   call_user_func ( array (
     
117.    $this,
     
118.    'split' ), $confObj, $k, $v );
     
119.   }
     
120. }
     
121. unset ( $conf );
     
122. // 处理继承
     
123. foreach ( $confObj as $k => $v ) {
     
124.   if (false !== strpos ( $k, ':' )) {
     
125.   if (0 === strpos ( $k, ':' )) {
     
126.    throw new ErrorException ( 'config ' . $k . ' is invalid, ':' can't be the first char' );
     
127.   } elseif (1 < substr_count ( $k, ':' )) {
     
128.    throw new ErrorException ( 'config ' . $k . ' is invalid, ':' can appear only once' );
     
129.   } else {
     
130.    $keys = explode ( ':', $k );
     
131.    if (! isset ( $confObj->$keys [1] )) {
     
132.    throw new ErrorException ( 'parent section ' . $keys [1] . ' doesn't exist in config file' );
     
133.    } else {
     
134.    if (isset ( $confObj->$keys [0] )) {
     
135.     throw new ErrorException ( 'config is invalid, ' . $keys [0] . ' and ' . $k . ' conflicts' );
     
136.    } else {
     
137.     $confObj->$keys [0] = $this->deepCloneR ( $confObj->$keys [1] );
     
138.     $this->objectMergeR ( $confObj->$keys [0], $v );
     
139.     unset ( $confObj->$k );
     
140.    }
     
141.    }
     
142.   }
     
143.   }
     
144. }
     
145. return $confObj;
     
146. }
     
147.   
     
148. /**
     
149. * php默认是浅克隆，函数实现深克隆
     
150. *
     
151. * @param object $obj     
     
152. * @return object $obj
     
153. */
     
154. private function deepCloneR($obj) {
     
155. $objClone = clone $obj;
     
156. foreach ( $objClone as $k => $v ) {
     
157.   if (is_object ( $v )) {
     
158.   $objClone->$k = $this->deepCloneR ( $v );
     
159.   }
     
160. }
     
161. return $objClone;
     
162. }
     
163.   
     
164. /**
     
165. * 递归的合并两个对象
     
166. *
     
167. * @param unknown $obj1     
     
168. * @param unknown $obj2     
     
169. */
     
170. private function objectMergeR($obj1, $obj2) {
     
171. foreach ( $obj2 as $k => $v ) {
     
172.   if (is_object ( $v ) && isset ( $obj1->$k ) && is_object ( $obj1->$k )) {
     
173.   $this->objectMergeR ( $obj1->$k, $v );
     
174.   } else {
     
175.   $obj1->$k = $v;
     
176.   }
     
177. }
     
178. }
     
179. }

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测试代码

1. $_ENV ['config'] = new Config ( file_get_contents ( __DIR__ . '/config.ini' ), array (
   
2. 'development' => array (
   
3.   'localhost.localdomain',
   
4.   'localhost'
   
5. ),
   
6. 'production' => array ()
   
7. ) );

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配置文件

1. [product]
   
2. db.default.dsn="mysql:host=127.0.0.1;dbname=default"
   
3. db.default.username=root
   
4. db.default.password=123456
   
5. 
   
6. admin.username=admin
   
7. admin.password=123456
   
8. 
   
9. php.error_reporting=E_ALL
   
10. php.display_errors=no
    
11. php.log_errors=yes
    
12. php.error_log=APP_PATH'/resource/log/phpError.log'
    
13. php.session.save_path=APP_PATH'/resource/data/session'
    
14. 
    
15. [development:product]
    
16. db.test1.dsn="mysql:host=127.0.0.1;dbname=test1"
    
17. db.test1.username=root
    
18. db.test1.password=123456
    
19. php.display_errors=yes
    
20. 
    
21. [url]
    
22. url.root = http://www.lai18.com/
    
23. url.resource = /resource/
    

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