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关于CI框架源码的阅读以及系统常量文件constants.php配置的分析

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发布： 2023-04-01 14:48:01

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CI框架源码阅读,系统常量文件constants.php的配置，需要的朋友可以参考一下

配置系统常量
1、当文件系统工作的时候检查并配置这些首选项
文件系统运行的时候这些默认的值会适当的增加系统的安全性，但是在php或apache的底层单独的为每各用户开一个进程的时候，使用八进制的值永远是正确的
FILE_READ_MODE 读取文件的模式
FILE_WRITE_MODE 写入文件的模式
DIR_READ_MODE 读取目录的模式
DIR_WRITE_MODE 写入目录的模式
2、文件流模式
当我们使用fopen()/popen()的时候需要这些模式
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');
文件源码

[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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