htaccess 500 error

[rick]

I know this error is caused by something simple in the htaccess file that I am overlooking, but I've been staring at it for hours with no luck. Can I get a fresh set of eyeballs on it please.

This is an ssl only site. The site works with a test.php file in document root, but fails when trying to access PW's index.php.

I've also read through this, https://github.com/ryancramerdesign/ProcessWire/issues/513

#################################################################################################
# START PROCESSWIRE HTACCESS DIRECTIVES
# @version 2.5
# @indexVersion 250
#################################################################################################

# -----------------------------------------------------------------------------------------------
# Don't show directory indexes, but do follow symbolic links
# 500 NOTE: Some cloud hosting companies don't allow +FollowSymLinks.
# Uncomment +SymLinksifOwnerMatch and comment +FollowSymLinks if you have 500 errors.
# If that doesn't resolve the error, then set it back to +FollowSymLinks.
# -----------------------------------------------------------------------------------------------

Options -Indexes
Options +FollowSymLinks
# Options +SymLinksifOwnerMatch  ## I changed this with no luck.

# -----------------------------------------------------------------------------------------------
# Let ProcessWire handle 404s
# -----------------------------------------------------------------------------------------------

ErrorDocument 404 /index.php

# -----------------------------------------------------------------------------------------------
# Handle request for missing favicon.ico/robots.txt files (no ending quote for Apache 1.3)
# -----------------------------------------------------------------------------------------------

<Files favicon.ico>
  ErrorDocument 404 "The requested file favicon.ico was not found.
</Files>

<Files robots.txt>
  ErrorDocument 404 "The requested file robots.txt was not found.
</Files>

# -----------------------------------------------------------------------------------------------
# Protect from XSS with Apache headers
# -----------------------------------------------------------------------------------------------

<IfModule mod_headers.c>
  # prevent site from being loaded in an iframe on another site
  # you will need to remove this one if you want to allow external iframes
  Header always append X-Frame-Options SAMEORIGIN

  # to prevent cross site scripting (IE8+ proprietary)
  Header set X-XSS-Protection "1; mode=block"

  # prevent mime-based attacks via content sniffing (IE+Chrome)
  # Header set X-Content-Type-Options "nosniff"
</IfModule>

# -----------------------------------------------------------------------------------------------
# Protect ProcessWire system files (part 1A) for Apache versions older than 2.4:
# APACHE 2.4+ NOTE: Comment out this section and uncomment second 1B below it.
# -----------------------------------------------------------------------------------------------

#<FilesMatch "\.(inc|info|info\.json|module|sh|sql)$|^(\..*)$">
#  Order allow,deny
#</FilesMatch>
#<Files .htaccess>
#  Require all denied
#</Files>

# -----------------------------------------------------------------------------------------------
# Protect ProcessWire system files (part 1B) for Apache versions 2.4 and newer:
# APACHE 2.4+ NOTE: Uncomment this section and remove or comment out section 1A above.
# -----------------------------------------------------------------------------------------------

<FilesMatch "\.(inc|info|info\.json|module|sh|sql)$|^(\..*)$">
 Require all denied
</FilesMatch>
<Files .htaccess>
 Require all denied
</Files>

# -----------------------------------------------------------------------------------------------
# Override a few PHP settings that can't be changed at runtime (not required)
# 500 NOTE: Try commenting out this entire section below if getting Apache 500 errors.
# -----------------------------------------------------------------------------------------------

#<IfModule mod_php5.c>
#  php_flag magic_quotes_gpc		off
#  php_flag magic_quotes_sybase		off
#  php_flag register_globals		off
#</IfModule>

# -----------------------------------------------------------------------------------------------
# Set default directory index files
# -----------------------------------------------------------------------------------------------

DirectoryIndex index.php index.html index.htm

# -----------------------------------------------------------------------------------------------
# ProcessWire requires mod_rewrite
# -----------------------------------------------------------------------------------------------

<IfModule mod_rewrite.c>

  RewriteEngine On
  AddDefaultCharset UTF-8

  # -----------------------------------------------------------------------------------------------
  # If you only want to allow HTTPS, uncomment the RewriteCond and RewriteRule lines below.
  # -----------------------------------------------------------------------------------------------
   RewriteCond %{HTTPS} off
   RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [L]

  # -----------------------------------------------------------------------------------------------
  # Set an environment variable so the installer can detect that mod_rewrite is active.
  # Note that some web hosts don't support this. If you get a 500 error, you might try
  # commenting out this SetEnv line below.
  # -----------------------------------------------------------------------------------------------

  <IfModule mod_env.c>
 #   SetEnv HTTP_MOD_REWRITE On
  </IfModule>

  # -----------------------------------------------------------------------------------------------
  # OPTIONAL: Set a rewrite base if rewrites aren't working properly on your server.
  # And if your site directory starts with a "~" you will most likely have to use this.
  # -----------------------------------------------------------------------------------------------

  # RewriteBase /
  # RewriteBase /sc/
  # RewriteBase /~user/

  # -----------------------------------------------------------------------------------------------
  # Access Restrictions: Keep web users out of dirs that begin with a period
  # -----------------------------------------------------------------------------------------------

  RewriteRule "(^|/)\." - [F]

  # -----------------------------------------------------------------------------------------------
  # OPTIONAL: Redirect users to the 'www.' version of the site (uncomment to enable).
  # For example: http://processwire.com/ would be redirected to http://www.processwire.com/
  # -----------------------------------------------------------------------------------------------

  # RewriteCond %{HTTP_HOST} !^www\. [NC]
  # RewriteRule ^ http://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

  # -----------------------------------------------------------------------------------------------
  # OPTIONAL: Send URLs with non name-format characters to 404 page
  # Remove this section if it interferes with URLs of any other software you may be running.
  # -----------------------------------------------------------------------------------------------

  RewriteCond %{REQUEST_URI} "[^-_.a-zA-Z0-9/~]"
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteRule ^(.*)$ index.php?it=/http404/ [L,QSA]

  # -----------------------------------------------------------------------------------------------
  # Access Restrictions: Protect ProcessWire system files
  # -----------------------------------------------------------------------------------------------

  # Allow screenshot files (for install.php only: this 1 line below may be removed after install)
  #RewriteCond %{REQUEST_URI} !(^|/)site-[^/]+/install/[^/]+\.(jpg|jpeg|png|gif)$
  # Block access to any htaccess files
  RewriteCond %{REQUEST_URI} (^|/)\.htaccess$ [NC,OR]
  # Block access to protected assets directories
  RewriteCond %{REQUEST_URI} (^|/)(site|site-[^/]+)/assets/(cache|logs|backups|sessions|config|install|tmp)($|/.*$) [OR]
  # Block acceess to the /site/install/ directory
  RewriteCond %{REQUEST_URI} (^|/)(site|site-[^/]+)/install($|/.*$) [OR]
  # Block dirs in /site/assets/ dirs that start with a hyphen
  RewriteCond %{REQUEST_URI} (^|/)(site|site-[^/]+)/assets.*/-.+/.* [OR]
  # Block access to /wire/config.php, /site/config.php, /site/config-dev.php, and /wire/index.config.php
  RewriteCond %{REQUEST_URI} (^|/)(wire|site|site-[^/]+)/(config|index\.config|config-dev)\.php$ [OR]
  # Block access to any PHP-based files in /templates-admin/
  RewriteCond %{REQUEST_URI} (^|/)(wire|site|site-[^/]+)/templates-admin($|/|/.*\.(php|html?|tpl|inc))$ [OR]
  # Block access to any PHP or markup files in /site/templates/
  RewriteCond %{REQUEST_URI} (^|/)(site|site-[^/]+)/templates($|/|/.*\.(php|html?|tpl|inc))$ [OR]
  # Block access to any PHP files in /site/assets/
  RewriteCond %{REQUEST_URI} (^|/)(site|site-[^/]+)/assets($|/|/.*\.php)$ [OR]
  # Block access to any PHP files in core or core module directories
  RewriteCond %{REQUEST_URI} (^|/)wire/(core|modules)/.*\.(php|inc|tpl|module|info\.json)$ [OR]
  # Block access to any PHP files in /site/modules/
  RewriteCond %{REQUEST_URI} (^|/)(site|site-[^/]+)/modules/.*\.(php|inc|tpl|module|info\.json)$ [OR]
  # Block access to any software identifying txt files
  RewriteCond %{REQUEST_URI} (^|/)(COPYRIGHT|INSTALL|README|htaccess)\.(txt|md|textile)$ [OR]
  # Block all http access to the default/uninstalled site-default directory
  RewriteCond %{REQUEST_URI} (^|/)site-default/
  # If any conditions above match, isssue a 403 forbidden
  RewriteRule ^.*$ - [F,L]

  # -----------------------------------------------------------------------------------------------
  # Ensure that the URL follows the name-format specification required by ProcessWire
  # -----------------------------------------------------------------------------------------------

  RewriteCond %{REQUEST_URI} "^/~?[-_.a-zA-Z0-9/]*$"

  # -----------------------------------------------------------------------------------------------
  # If the request is for a file or directory that physically exists on the server,
  # then don't give control to ProcessWire, and instead load the file
  # -----------------------------------------------------------------------------------------------

  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_FILENAME} !(favicon\.ico|robots\.txt)

  # -----------------------------------------------------------------------------------------------
  # OPTIONAL: Prevent ProcessWire from attempting to serve images or anything in /site/assets/.
  # Both of these lines are optional, but can help to reduce server load. However, they
  # are not compatible with the $config->pagefileSecure option (if enabled) and they
  # may produce an Apache 404 rather than your regular 404. You may uncomment the two lines
  # below if you don't need to use the $config->pagefileSecure option.
  # -----------------------------------------------------------------------------------------------

  # RewriteCond %{REQUEST_FILENAME} !\.(jpg|jpeg|gif|png|ico)$ [NC]
  # RewriteCond %{REQUEST_FILENAME} !(^|/)site/assets/

  # -----------------------------------------------------------------------------------------------
  # Pass control to ProcessWire if all the above directives allow us to this point.
  # For regular VirtualHosts (most installs)
  # -----------------------------------------------------------------------------------------------
  RewriteRule ^(.*)$ index.php?it=$1 [L,QSA]

  # -----------------------------------------------------------------------------------------------
  # 500 NOTE: If using VirtualDocumentRoot: comment out the one above and use this one instead.
  # -----------------------------------------------------------------------------------------------
  # RewriteRule ^(.*)$ /index.php?it=$1 [L,QSA]

</IfModule>

#################################################################################################
# END PROCESSWIRE HTACCESS DIRECTIVES
#################################################################################################

[pwired]

Your # RewriteBase / has to be uncommented like this RewriteBase / if your site is in the root of the server (hoster)

This is usually the case.

Else use RewriteBase / dir if your site is in a root directory (replace dir with the name of your directory)

On some hosters Header add Cache-Control "max-age=1" is needed on the first line of .htaccess

[LostKobrakai]

http://processwire.com/docs/tutorials/troubleshooting-guide/

[rick]

Just a quick follow-up.

There is no error in the PW htaccess file when running ubuntu 14.04 lamp stack. The error is, however, with ubuntu's tasksel installation of the lamp server. It missed some php5 items, such as apcu, gd, curl, etc., but they were later installed without issue.