|
|
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(hù)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 */
php技術(shù)：CI框架源碼閱讀,系統(tǒng)常量文件constants.php的配置，轉(zhuǎn)載需保留來(lái)源！
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