關於CI框架原始碼的閱讀以及系統常數檔constants.php配置的分析

CI框架原始碼閱讀,系統常數檔constants.php的配置，需要的朋友可以參考一下

配置系統常數
1、當檔案系統工作的時候檢查並配置這些首選項
檔案系統運作的時候這些預設的值會適當的增加系統的安全性，但是在php或apache的底層單獨的為每各使用者開一個行程的時候，使用八進位的值永遠是正確的
FILE_READ_MODE 讀取文件的模式
FILE_WRITE_MODE   寫入檔案的模式
DIR_READ_MODE   讀取目錄的模式
DIR_WRITE_MODE 寫入目錄的模式
2、檔案流模式

#。 /popen()的時候需要這些模式

define('FOPEN_READ', 'rb');

define('FOPEN_READ_WRITE', 'r b');define('FOPEN_WRITE_CREATE_DESTRUCTIVE', 'wb'##define('FOPEN_WRITE_CREATE_DESTRUCTIVE', 'wb' ); define('FOPEN_READ_WRITE_CREATE_DESTRUCTIVE',  'w b');
define('FOPEN_WRITE_CREATE', 'ab');

define('FOPEN_READ_WRITE_CREATE', 'ab');

define('FOPEN_READ_WRITE_CREATE', 'a b');#define ('FOPEN_WRITE_CREATE_STRICT', 'xb');

define('FOPEN_READ_WRITE_CREATE_STRICT',  'x b');

檔案原始碼

[php]  
<?php  if ( ! defined(&#39;BASEPATH&#39;)) exit(&#39;No direct script access allowed&#39;);  
/* 
|-------------------------------------------------------------------------- 
| File and Directory Modes 
|-------------------------------------------------------------------------- 
| These prefs 控制台、首选项 are used when checking and setting modes when working 
| with the file system.  The defaults are fine 罚款 on servers with proper 
| security, but you may wish (or even need) to change the values in 
| certain environments (Apache running a separate process for each 
| user, PHP under CGI with Apache suEXEC, etc.).  Octal values should 
| always be used to set the mode correctly. 
*/  
define(&#39;FILE_READ_MODE&#39;, 0644);  
define(&#39;FILE_WRITE_MODE&#39;, 0666);  
define(&#39;DIR_READ_MODE&#39;, 0755);  
define(&#39;DIR_WRITE_MODE&#39;, 0777);  
/* 
|-------------------------------------------------------------------------- 
| File Stream Modes 文件流模式 
|-------------------------------------------------------------------------- 
| These modes are used when working with fopen()/popen() 
*/  
define(&#39;FOPEN_READ&#39;,                            &#39;rb&#39;);  
define(&#39;FOPEN_READ_WRITE&#39;,                      &#39;r+b&#39;);  
define(&#39;FOPEN_WRITE_CREATE_DESTRUCTIVE&#39;,        &#39;wb&#39;); // truncates existing file data, use with care  
define(&#39;FOPEN_READ_WRITE_CREATE_DESTRUCTIVE&#39;,   &#39;w+b&#39;); // truncates existing file data, use with care  
define(&#39;FOPEN_WRITE_CREATE&#39;,                    &#39;ab&#39;);  
define(&#39;FOPEN_READ_WRITE_CREATE&#39;,               &#39;a+b&#39;);  
define(&#39;FOPEN_WRITE_CREATE_STRICT&#39;,             &#39;xb&#39;);  
define(&#39;FOPEN_READ_WRITE_CREATE_STRICT&#39;,        &#39;x+b&#39;);  
  
/* End of file constants.php */  
/* Location: ./application/config/constants.php */

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