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CI框架源碼閱讀,系統(tǒng)常量文件constants.php的配置

更新時(shí)間：2013年02月28日 11:04:20 作者：

CI框架源碼閱讀,系統(tǒng)常量文件constants.php的配置，需要的朋友可以參考一下

配置系統(tǒng)常量
1、當(dāng)文件系統(tǒng)工作的時(shí)候檢查并配置這些首選項(xiàng)
文件系統(tǒng)運(yùn)行的時(shí)候這些默認(rèn)的值會(huì)適當(dāng)?shù)脑黾酉到y(tǒng)的安全性，但是在php或apache的底層單獨(dú)的為每各用戶開(kāi)一個(gè)進(jìn)程的時(shí)候，使用八進(jìn)制的值永遠(yuǎn)是正確的
FILE_READ_MODE 讀取文件的模式
FILE_WRITE_MODE 寫(xiě)入文件的模式
DIR_READ_MODE 讀取目錄的模式
DIR_WRITE_MODE 寫(xiě)入目錄的模式

2、文件流模式
當(dāng)我們使用fopen()/popen()的時(shí)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_READ_WRITE_CREATE_DESTRUCTIVE', 'w+b');
define('FOPEN_WRITE_CREATE', 'ab');
define('FOPEN_READ_WRITE_CREATE', 'a+b');
define('FOPEN_WRITE_CREATE_STRICT', 'xb');
define('FOPEN_READ_WRITE_CREATE_STRICT', 'x+b');

文件源碼：

復(fù)制代碼代碼如下:

[php]  
<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');  

/* 
|-------------------------------------------------------------------------- 
| File and Directory Modes 
|-------------------------------------------------------------------------- 

| These prefs 控制臺(tái)、首選項(xiàng) are used when checking and setting modes when working 
| with the file system.  The defaults are fine 罰款 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('FILE_READ_MODE', 0644);  
define('FILE_WRITE_MODE', 0666);  
define('DIR_READ_MODE', 0755);  
define('DIR_WRITE_MODE', 0777);  

/* 
|-------------------------------------------------------------------------- 
| File Stream Modes 文件流模式 
|-------------------------------------------------------------------------- 

| These modes are used when working with fopen()/popen() 

*/  

define('FOPEN_READ',                            'rb');  
define('FOPEN_READ_WRITE',                      'r+b');  
define('FOPEN_WRITE_CREATE_DESTRUCTIVE',        'wb'); // truncates existing file data, use with care  
define('FOPEN_READ_WRITE_CREATE_DESTRUCTIVE',   'w+b'); // truncates existing file data, use with care  
define('FOPEN_WRITE_CREATE',                    'ab');  
define('FOPEN_READ_WRITE_CREATE',               'a+b');  
define('FOPEN_WRITE_CREATE_STRICT',             'xb');  
define('FOPEN_READ_WRITE_CREATE_STRICT',        'x+b');  

  
/* End of file constants.php */  
/* Location: ./application/config/constants.php */  