關於CI架構源碼的閱讀以及系統常量檔案constants.php配置的分析

CI架構源碼閱讀,系統常量檔案constants.php的配置，需要的朋友可以參考一下

配置系統常量
1、當檔案系統工作的時候檢查並配置這些喜好設定
檔案系統啟動並執行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進程的時候，使用八進位的值永遠是正確的
FILE_READ_MODE 讀取檔案的模式
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
當我們使用fopen()/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_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');
檔案源碼

[php]  <?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');  /* |-------------------------------------------------------------------------- | File and Directory Modes |-------------------------------------------------------------------------- | These prefs 控制台、喜好設定 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 檔案流模式 |-------------------------------------------------------------------------- | 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 */

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