What should I do if php cannot call linux commands?

How to solve the problem that php cannot call linux commands: 1. Turn off selinux; 2. Add the apache user in the httpd.conf configuration file to use all commands; 3. Modify the default permissions for starting apache.

The operating environment of this article: linux5.9.8 system, PHP7.1 version, DELL G3 computer

php cannot call the linux command: authorization denied or The audit interface cannot be opened

1. Close selinux

Method

a. Quickly close SElinux. Use the following command:

　　/usr/sbin/setenforce 0 立刻关闭 SELINUX
　　/usr/sbin/setenforce 1 立刻启用 SELINUX

b. Add to The system starts by default

　　echo "/usr/sbin/setenforce 0" >> /etc/rc.local

c. You can edit the configuration file to achieve the same purpose

     vi /etc/selinux/conf
     set SELINUX=disabled

2. Add the apache user to the httpd.conf configuration file to use all commands without a password

disable_functions= in the php.ini file cancels restrictions on related functions

3. Modify the default permissions for starting apache

Method

a, Modification

        vi /etc/passwd
　　vi /etc/group
        vi/etc/sudoers

b. Add the apache user to the corresponding file/folder owner chown user.group FoldersName

Modify permissions chmod 775 Foldersname

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