Configure system constants
1. Check and configure these preferences when the file system is working
These default values will appropriately increase the security of the system when the file system is running, but when the bottom layer of php or apache opens a separate process for each user, it is always correct to use octal values
FILE_READ_MODE mode for reading files
FILE_WRITE_MODE mode for writing files
DIR_READ_MODE Mode for reading directories
DIR_WRITE_MODE mode for writing directories
2. File stream mode
These modes are needed when we use fopen()/popen()
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');
File source code:
[php]
/*
|------------------------------------------------- ----------------------------
| File and Directory Modes
|------------------------------------------------- ----------------------------
|
| These prefs are used when checking and setting modes when working
| with the file system. The defaults are fine 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 File Stream Modes
|------------------------------------------------- ----------------------------
|
| 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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