How to Install DokuWiki with Apache on Debian 9

<Directory /var/www/html>
  Options +FollowSymlinks
  AllowOverride All
  Require all granted
</Directory>

Also, make the following change to VirtualHost line to make it look like the way it’s shown in the excerpt below:

<VirtualHost *:443>

Close the SSL Apache file and open the /etc/apache2/sites-enabled/000-default.conf file for editing and add the same URL rewrite rules for SSL configuration file. Insert the lines of code after DocumentRoot statement as shown in the following example.

<Directory /var/www/html>
  Options +FollowSymlinks
  AllowOverride All
  Require all granted
</Directory>

Finally, restart Apache daemon to apply all rules configured so far and visit your domain via the HTTP protocol. Because you’re using the automatically Self-Signed certificates pairs issued by Apache at installation, a certificate that is untrusted by the browser, an error warning should be displayed in the browser.

systemctl restart apache2

https://yourdomain.tld 

Accept the warning in order to accept the untrusted certificate and continue to be redirected to Apache default web page, as illustrated in the image below.

In case the UFW firewall application blocks incoming network connections to HTTPS port, you should add a new rule to allow HTTPS traffic to pass through firewall by issuing the following command.

ufw allow ‘WWW Full’

or

ufw allow 443/tcp

If iptables is the default firewall application installed to protect your Debian system at the network level, add the following rule to allow port 443 inbound traffic in the firewall so that visitors can browse your domain name.

iptables -I INPUT -p tcp –destination-port 443 -j ACCEPT

netfilter-persistent save

systemctl restart netfilter-persistent

systemctl status netfilter-persistent

On the next step, we need to make some further changes to PHP default configuration file in order to assure that the following PHP variables are enabled and the PHP timezone setting is correctly configured and matches your system geographical location.  Open /etc/php/7.0/apache2/php.ini file for editing and make sure that the following lines are setup as shown. Also, initially, make a backup of the PHP configuration file.

cp /etc/php/7.0/apache2/php.ini{,.backup}

nano /etc/php/7.0/apache2/php.ini

 Search, edit and change the following variables in php.ini configuration file:

file_uploads = On
default_charset = UTF-8
memory_limit = 128M
max_execution_time = 300
upload_max_filesize = 100M
short_open_tag = Off
output_buffering = Off
output_handler =
zlib.output_compression = Off
implicit_flush = Off
max_input_time = 60
max_input_vars = 10000
error_reporting = E_ALL & ~E_NOTICE
display_startup_errors = Off
log_errors = On
variables_order = “EGPCS”
register_argc_argv = Off
session.use_cookies = 1
date.timezone = Europe/London

Increase upload_max_file_size variable as suitable to support large file attachments and replace the time.zone variable accordingly to your physical time by consulting the list of time zones provided by PHP docs at the following link http://php.net/manual/en/timezones.php 

If you want to increase the load speed of your website pages via OPCache plugin available for PHP7, append the following OPCache settings at the bottom of the PHP interpreter configuration file, as detailed below:

[opcache]
opcache.enable=1 
opcache.enable_cli=1 
opcache.interned_strings_buffer=8 
opcache.max_accelerated_files=10000 
opcache.memory_consumption=128 
opcache.save_comments=1
opcache.revalidate_freq=1

 Close the php.ini configuration and restart apache daemon to apply the new changes by issuing the following command.

systemctl restart apache2

Finally, create a PHP info file by executing the following command and check if the PHP time zone has been correctly configured by visiting the PHP info script file from a browser at the following URL, as illustrated in the below image. Scroll down to date setting to check PHP time zone configuration.

echo ‘<?php phpinfo(); ?>’| tee /var/www/html/info.php

https://domain.tld/info.php

Install DokuWiki 

After all system requirements are met for installing your wiki documentation CMS, visit DokuWiki official download page at https://download.dokuwiki.org/ and grab the latest stable zip package compressed archive in your system by issuing the following command.

wget https://download.dokuwiki.org/src/dokuwiki/dokuwiki-stable.tgz 

After the zip archive download finishes, extract the DokuWiki zip archive file to your current working directory and list the extracted files by issuing the following commands. Also, remove the default index.html file installed by Apache web server to webroot path and also delete the info.php file created earlier.

tar xzvf dokuwiki-stable.tgz

ls 

rm /var/www/html/index.html 

rm /var/www/html/info.php

The installation files of DokuWiki are located in your current working directory in dokuwiki-2017-20-19e directory. Issue the ls command to list the extracted directory files. Copy all the content of the extracted directory to your web server document root path by issuing the command below. Also, make sure you copy the hidden file .htaccess to HTTP server webroot path.

# Modify PHP settings
php_value session.use_trans_sid 0
php_value register_globals 1
php_value upload_max_filesize 100M
php_value post_max_size 100M

# Redirect to HTTPS for all pages including the main web page
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{SERVER_NAME}/$1 [R,L]
Options -Indexes
</IfModule>

# Switch to HTTPS on login, profile and admin actions
RewriteEngine On
RewriteCond %{HTTPS} !on
RewriteCond %{QUERY_STRING} do=(log|profile|admin)
RewriteRule ^(.*) https://%{HTTP_HOST}/$1 [R,QSA,L,NE]