配置系統常量 1、當文件系統工作的時候檢查並配置這些首選項 文件系統運行的時候這些默認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用戶開一個進程的時候，使用八進制的值永遠是正確的 FILE_READ_MODE 讀取文件的模式 FILE_WRITE_MODE 寫入文件的模式 DIR_READ_MODE 讀取目錄的模式 DIR_WRITE_MODE 寫入目錄的模式 2、文件流模式 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'); 文件源碼： [php] <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); /* |-------------------------------------------------------------------------- | File and Directory Modes |-------------------------------------------------------------------------- | | These prefs 控制台、首選項 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 */
