You need at least the following setup:
ServerName example.com
ServerAlias example.com www.example.com
ServerAdmin [email protected]
DocumentRoot /var/www/html/example_com
ErrorLog /var/log/httpd/example_com_error
CustomLog /var/log/httpd/example_com_access common
Options FollowSymLinks Indexes
AllowOverride All
Order Allow,Deny
Allow from all
DirectoryIndex index.php
Note: if got AH01630: client denied by server configuration error. Please use below:
ServerName example.com
ServerAlias example.com www.example.com
ServerAdmin [email protected]
DocumentRoot /var/www/html/example_com
ErrorLog /var/log/httpd/example_com_error
CustomLog /var/log/httpd/example_com_access common
Options FollowSymLinks Indexes
AllowOverride All
Require all granted
DirectoryIndex index.php
Credit: @ProjectPatatoe