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:
代码如下:
- [php]
- /*
- |--------------------------------------------------------------------------
- | 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 */
来源: https://www.php1.cn/detail/php-b16e8a9e58.html