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('BASEPATH')) exit('No direct script access allowed'); /* |-------------------------------------------------------------------------- | 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('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 */
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