CI framework source code reading, system constant file constants.php configuration

CI framework source code reading, system constant file constants.php configuration_PHP tutorial

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Release： 2016-07-21 15:13:00

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Configuring system constants
1. Check and configure these preferences when the file system is working
When the file system is running, these default values will appropriately increase the security of the system, but at the bottom of PHP or Apache alone When opening a process for each user, it is always correct to use octal values
FILE_READ_MODE The mode for reading files
FILE_WRITE_MODE The mode for writing files
DIR_READ_MODE The mode for reading directories
DIR_WRITE_MODE Write Directory mode

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:

Copy code The code is as follows:

[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('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 */ 
 