Configuration of open_basedir under php

The main content of this article is about the configuration of open_basedir under PHP. It has a certain reference value. Now I share it with everyone. Friends in need can refer to it

After downloading the YII2.0 framework and After successfully configuring nginx, I found that it was still inaccessible. I checked the error log and found that the error message included require(): open_basedir restriction in effect. So I searched online and found that the PHP configuration item open_basedir restricted the path accessed by require().​

open_basedir limits the files that php can open to the specified directory tree, including the file itself. When a program opens a file using, for example, fopen() or file_get_contents(), the location of the file is checked. When the file is outside the specified directory tree, the program will refuse to open it.

In Linux systems, open_basedir is mainly configured in the php.ini and fastcgi.conf files. The configuration in php.ini is as follows: open_basedir="specified directory"; the configuration in fastcgi.conf is as follows: fastcgi_param PHP_VALUE "open_basedir =Specify directory";

Under Windows, it is mainly configured in the http.conf file of php.ini and apache. The configuration in http.conf is as follows: php_admin_value open_basedir "Specify directory".

The limit specified with open_basedir is actually a prefix, not a directory name. In other words, open_basedir=/home/fdipzone will also allow access to /home/fdipzone_abc. If you want to limit access to a directory, please use a slash to end the path name, for example: open_basedir=”/home/fdipzone/”. If you want to set up multiple directories, window uses; to separate directories, and Linux uses: to separate directories.

Using open_basedir can limit the directories and files that the program can operate and improve system security. However, it will affect I/O performance and cause system execution to slow down. Therefore, it is necessary to balance security and performance according to specific needs.

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