我添加了对.htaccess文件的更改，这是不正确的，一旦我删除了代码，网站开始提供500内部服务器错误。有人可以帮忙吗？
我似乎无法理解为什么，一旦我删除了新代码，仍然会出现问题？
# Apache Configuration File
# (!) Using `.htaccess` files slows down Apache, therefore, if you have access
# to the main server config file (usually called `httpd.conf`), you should add
# this logic there: http://httpd.apache.org/docs/current/howto/htaccess.html.
# ##############################################################################
# # CROSS-ORIGIN RESOURCE SHARING (CORS) #
# ##############################################################################
# ------------------------------------------------------------------------------
# | Cross-domain AJAX requests |
# ------------------------------------------------------------------------------
# Enable cross-origin AJAX requests.
# http://code.google.com/p/html5security/wiki/CrossOriginRequestSecurity
# http://enable-cors.org/
# <IfModule mod_headers.c>
# Header set Access-Control-Allow-Origin "*"
# </IfModule>
# ------------------------------------------------------------------------------
# | CORS-enabled images |
# ------------------------------------------------------------------------------
# Send the CORS header for images when browsers request it.
# https://developer.mozilla.org/en/CORS_Enabled_Image
# http://blog.chromium.org/2011/07/using-cross-domain-images-in-webgl-and.html
# http://hacks.mozilla.org/2011/11/using-cors-to-load-webgl-textures-from-cross-domain-images/
<IfModule mod_setenvif.c>
<IfModule mod_headers.c>
<FilesMatch "\.(gif|ico|jpe?g|png|svg|svgz|webp)$">
SetEnvIf Origin ":" IS_CORS
Header set Access-Control-Allow-Origin "*" env=IS_CORS
</FilesMatch>
</IfModule>
</IfModule>
# ------------------------------------------------------------------------------
# | Web fonts access |
# ------------------------------------------------------------------------------
# Allow access from all domains for web fonts
<IfModule mod_headers.c>
<FilesMatch "\.(eot|font.css|otf|ttc|ttf|woff)$">
Header set Access-Control-Allow-Origin "*"
</FilesMatch>
</IfModule>
# ##############################################################################
# # ERRORS #
# ##############################################################################
# ------------------------------------------------------------------------------
# | 404 error prevention for non-existing redirected folders |
# ------------------------------------------------------------------------------
# Prevent Apache from returning a 404 error for a rewrite if a directory
# with the same name does not exist.
# http://httpd.apache.org/docs/current/content-negotiation.html#multiviews
# http://www.webmasterworld.com/apache/3808792.htm
Options -MultiViews
# ------------------------------------------------------------------------------
# | Custom error messages / pages |
# ------------------------------------------------------------------------------
# You can customize what Apache returns to the client in case of an error (see
# http://httpd.apache.org/docs/current/mod/core.html#errordocument), e.g.:
ErrorDocument 404 /404.html
# ##############################################################################
# # INTERNET EXPLORER #
# ##############################################################################
# ------------------------------------------------------------------------------
# | Better website experience |
# ------------------------------------------------------------------------------
# Force IE to render pages in the highest available mode in the various
# cases when it may not: http://hsivonen.iki.fi/doctype/ie-mode.pdf.
# Use, if installed, Google Chrome Frame.
<IfModule mod_headers.c>
Header set X-UA-Compatible "IE=edge,chrome=1"
# `mod_headers` can't match based on the content-type, however, we only
# want to send this header for HTML pages and not for the other resources
<FilesMatch "\.(appcache|crx|css|eot|gif|htc|ico|jpe?g|js|m4a|m4v|manifest|mp4|oex|oga|ogg|ogv|otf|pdf|png|safariextz|svg|svgz|ttf|vcf|webapp|webm|webp|woff|xml|xpi)$">
Header unset X-UA-Compatible
</FilesMatch>
</IfModule>
# ------------------------------------------------------------------------------
# | Cookie setting from iframes |
# ------------------------------------------------------------------------------
# Allow cookies to be set from iframes in IE.
# <IfModule mod_headers.c>
# Header set P3P "policyref=\"/w3c/p3p.xml\", CP=\"IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT\""
# </IfModule>
# ------------------------------------------------------------------------------
# | Screen flicker |
# ------------------------------------------------------------------------------
# Stop screen flicker in IE on CSS rollovers (this only works in
# combination with the `ExpiresByType` directives for images from below).
# BrowserMatch "MSIE" brokenvary=1
# BrowserMatch "Mozilla/4.[0-9]{2}" brokenvary=1
# BrowserMatch "Opera" !brokenvary
# SetEnvIf brokenvary 1 force-no-vary
# ##############################################################################
# # MIME TYPES AND ENCODING #
# ##############################################################################
# ------------------------------------------------------------------------------
# | Proper MIME types for all files |
# ------------------------------------------------------------------------------
<IfModule mod_mime.c>
# Audio
AddType audio/mp4 m4a f4a f4b
AddType audio/ogg oga ogg
# JavaScript
# Normalize to standard type (it's sniffed in IE anyways):
# http://tools.ietf.org/html/rfc4329#section-7.2
AddType application/javascript js jsonp
AddType application/json json
# Video
AddType video/mp4 mp4 m4v f4v f4p
AddType video/ogg ogv
AddType video/webm webm
AddType video/x-flv flv
# Web fonts
AddType application/font-woff woff
AddType application/vnd.ms-fontobject eot
# Browsers usually ignore the font MIME types and sniff the content,
# however, Chrome shows a warning if other MIME types are used for the
# following fonts.
AddType application/x-font-ttf ttc ttf
AddType font/opentype otf
# Make SVGZ fonts work on iPad:
# https://twitter.com/FontSquirrel/status/14855840545
AddType image/svg+xml svg svgz
AddEncoding gzip svgz
# Other
AddType application/octet-stream safariextz
AddType application/x-chrome-extension crx
AddType application/x-opera-extension oex
AddType application/x-shockwave-flash swf
AddType application/x-web-app-manifest+json webapp
AddType application/x-xpinstall xpi
AddType application/xml atom rdf rss xml
AddType image/webp webp
AddType image/x-icon ico
AddType text/cache-manifest appcache manifest
AddType text/vtt vtt
AddType text/x-component htc
AddType text/x-vcard vcf
</IfModule>
# ------------------------------------------------------------------------------
# | UTF-8 encoding |
# ------------------------------------------------------------------------------
# Use UTF-8 encoding for anything served as `text/html` or `text/plain`.
AddDefaultCharset utf-8
# Force UTF-8 for certain file formats.
<IfModule mod_mime.c>
AddCharset utf-8 .atom .css .js .json .rss .vtt .webapp .xml
</IfModule>
# ##############################################################################
# # URL REWRITES #
# ##############################################################################
# ------------------------------------------------------------------------------
# | Rewrite engine |
# ------------------------------------------------------------------------------
# Turning on the rewrite engine and enabling the `FollowSymLinks` option is
# necessary for the following directives to work.
# If your web host doesn't allow the `FollowSymlinks` option, you may need to
# comment it out and use `Options +SymLinksIfOwnerMatch` but, be aware of the
# performance impact: http://httpd.apache.org/docs/current/misc/perf-tuning.html#symlinks
# Also, some cloud hosting services require `RewriteBase` to be set:
# http://www.rackspace.com/knowledge_center/frequently-asked-question/why-is-mod-rewrite-not-working-on-my-site
<IfModule mod_rewrite.c>
Options +FollowSymlinks
# Options +SymLinksIfOwnerMatch
RewriteEngine On
# RewriteBase /
#no directory
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php -f
RewriteRule ^(.*)$ $1.php
</IfModule>
# ------------------------------------------------------------------------------
# | Suppressing / Forcing the "www." at the beginning of URLs |
# ------------------------------------------------------------------------------
# The same content should never be available under two different URLs especially
# not with and without "www." at the beginning. This can cause SEO problems
# (duplicate content), therefore, you should choose one of the alternatives and
# redirect the other one.
# By default option 1 (no "www.") is activated:
# http://no-www.org/faq.php?q=class_b
# If you'd prefer to use option 2, just comment out all the lines from option 1
# and uncomment the ones from option 2.
# IMPORTANT: NEVER USE BOTH RULES AT THE SAME TIME!
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# Option 1: rewrite www.example.com → example.com
#<IfModule mod_rewrite.c>
# RewriteCond %{HTTPS} !=on
# RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC]
# RewriteRule ^ http://%1%{REQUEST_URI} [R=301,L]
#</IfModule>
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# Option 2: rewrite example.com → www.example.com
# Be aware that the following might not be a good idea if you use "real"
# subdomains for certain parts of your website.
<IfModule mod_rewrite.c>
RewriteCond %{HTTPS} !=on
RewriteCond %{HTTP_HOST} !^www\..+$ [NC]
RewriteRule ^ http://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
</IfModule>
# ##############################################################################
# # SECURITY #
# ##############################################################################
# ------------------------------------------------------------------------------
# | Content Security Policy (CSP) |
# ------------------------------------------------------------------------------
# You can mitigate the risk of cross-site scripting and other content-injection
# attacks by setting a Content Security Policy which whitelists trusted sources
# of content for your site.
# The example header below allows ONLY scripts that are loaded from the current
# site's origin (no inline scripts, no CDN, etc). This almost certainly won't
# work as-is for your site!
# To get all the details you'll need to craft a reasonable policy for your site,
# read: http://html5rocks.com/en/tutorials/security/content-security-policy (or
# see the specification: http://w3.org/TR/CSP).
# <IfModule mod_headers.c>
# Header set Content-Security-Policy "script-src 'self'; object-src 'self'"
# <FilesMatch "\.(appcache|crx|css|eot|gif|htc|ico|jpe?g|js|m4a|m4v|manifest|mp4|oex|oga|ogg|ogv|otf|pdf|png|safariextz|svg|svgz|ttf|vcf|webapp|webm|webp|woff|xml|xpi)$">
# Header unset Content-Security-Policy
# </FilesMatch>
# </IfModule>
# ------------------------------------------------------------------------------
# | File access |
# ------------------------------------------------------------------------------
# Block access to directories without a default document.
# Usually you should leave this uncommented because you shouldn't allow anyone
# to surf through every directory on your server (which may includes rather
# private places like the CMS's directories).
<IfModule mod_autoindex.c>
Options -Indexes
</IfModule>
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# Block access to hidden files and directories.
# This includes directories used by version control systems such as Git and SVN.
<IfModule mod_rewrite.c>
RewriteCond %{SCRIPT_FILENAME} -d [OR]
RewriteCond %{SCRIPT_FILENAME} -f
RewriteRule "(^|/)\." - [F]
</IfModule>
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# Block access to backup and source files.
# These files may be left by some text editors and can pose a great security
# danger when anyone has access to them.
<FilesMatch "(^#.*#|\.(bak|config|dist|fla|inc|ini|log|psd|sh|sql|sw[op])|~)$">
Order allow,deny
Deny from all
Satisfy All
</FilesMatch>
# ------------------------------------------------------------------------------
# | Secure Sockets Layer (SSL) |
# ------------------------------------------------------------------------------
# Rewrite secure requests properly to prevent SSL certificate warnings, e.g.:
# prevent `https://www.example.com` when your certificate only allows
# `https://secure.example.com`.
# <IfModule mod_rewrite.c>
# RewriteCond %{SERVER_PORT} !^443
# RewriteRule ^ https://example-domain-please-change-me.com%{REQUEST_URI} [R=301,L]
# </IfModule>
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# Force client-side SSL redirection.
# If a user types "example.com" in his browser, the above rule will redirect him
# to the secure version of the site. That still leaves a window of opportunity
# (the initial HTTP connection) for an attacker to downgrade or redirect the
# request. The following header ensures that browser will ONLY connect to your
# server via HTTPS, regardless of what the users type in the address bar.
# http://www.html5rocks.com/en/tutorials/security/transport-layer-security/
# <IfModule mod_headers.c>
# Header set Strict-Transport-Security max-age=16070400;
# </IfModule>
# ------------------------------------------------------------------------------
# | Server software information |
# ------------------------------------------------------------------------------
# Avoid displaying the exact Apache version number, the description of the
# generic OS-type and the information about Apache's compiled-in modules.
# ADD THIS DIRECTIVE IN THE `httpd.conf` AS IT WILL NOT WORK IN THE `.htaccess`!
# ServerTokens Prod
# ##############################################################################
# # WEB PERFORMANCE #
# ##############################################################################
# ------------------------------------------------------------------------------
# | Compression |
# ------------------------------------------------------------------------------
<IfModule mod_deflate.c>
# Force compression for mangled headers.
# http://developer.yahoo.com/blogs/ydn/posts/2010/12/pushing-beyond-gzipping
<IfModule mod_setenvif.c>
<IfModule mod_headers.c>
SetEnvIfNoCase ^(Accept-EncodXng|X-cept-Encoding|X{15}|~{15}|-{15})$ ^((gzip|deflate)\s*,?\s*)+|[X~-]{4,13}$ HAVE_Accept-Encoding
RequestHeader append Accept-Encoding "gzip,deflate" env=HAVE_Accept-Encoding
</IfModule>
</IfModule>
# Compress all output labeled with one of the following MIME-types
# (for Apache versions below 2.3.7, you don't need to enable `mod_filter`
# and can remove the `<IfModule mod_filter.c>` and `</IfModule>` lines
# as `AddOutputFilterByType` is still in the core directives).
<IfModule mod_filter.c>
AddOutputFilterByType DEFLATE application/atom+xml \
application/javascript \
application/json \
application/rss+xml \
application/vnd.ms-fontobject \
application/x-font-ttf \
application/x-web-app-manifest+json \
application/xhtml+xml \
application/xml \
font/opentype \
image/svg+xml \
image/x-icon \
text/css \
text/html \
text/plain \
text/x-component \
text/xml
</IfModule>
</IfModule>
# ------------------------------------------------------------------------------
# | Content transformations |
# ------------------------------------------------------------------------------
# Prevent some of the mobile network providers from modifying the content of
# your site: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.5.
# <IfModule mod_headers.c>
# Header set Cache-Control "no-transform"
# </IfModule>
# ------------------------------------------------------------------------------
# | ETag removal |
# ------------------------------------------------------------------------------
# Since we're sending far-future expires headers (see below), ETags can
# be removed: http://developer.yahoo.com/performance/rules.html#etags.
# `FileETag None` is not enough for every server.
<IfModule mod_headers.c>
Header unset ETag
</IfModule>
FileETag None
# ------------------------------------------------------------------------------
# | Expires headers (for better cache control) |
# ------------------------------------------------------------------------------
# The following expires headers are set pretty far in the future. If you don't
# control versioning with filename-based cache busting, consider lowering the
# cache time for resources like CSS and JS to something like 1 week.
<IfModule mod_expires.c>
ExpiresActive on
ExpiresDefault "access plus 1 month"
# CSS
ExpiresByType text/css "access plus 1 year"
# Data interchange
ExpiresByType application/json "access plus 0 seconds"
ExpiresByType application/xml "access plus 0 seconds"
ExpiresByType text/xml "access plus 0 seconds"
# Favicon (cannot be renamed!)
ExpiresByType image/x-icon "access plus 1 week"
# HTML components (HTCs)
ExpiresByType text/x-component "access plus 1 month"
# HTML
ExpiresByType text/html "access plus 0 seconds"
# JavaScript
ExpiresByType application/javascript "access plus 1 year"
# Manifest files
ExpiresByType application/x-web-app-manifest+json "access plus 0 seconds"
ExpiresByType text/cache-manifest "access plus 0 seconds"
# Media
ExpiresByType audio/ogg "access plus 1 month"
ExpiresByType image/gif "access plus 1 month"
ExpiresByType image/jpeg "access plus 1 month"
ExpiresByType image/png "access plus 1 month"
ExpiresByType video/mp4 "access plus 1 month"
ExpiresByType video/ogg "access plus 1 month"
ExpiresByType video/webm "access plus 1 month"
# Web feeds
ExpiresByType application/atom+xml "access plus 1 hour"
ExpiresByType application/rss+xml "access plus 1 hour"
# Web fonts
ExpiresByType application/font-woff "access plus 1 month"
ExpiresByType application/vnd.ms-fontobject "access plus 1 month"
ExpiresByType application/x-font-ttf "access plus 1 month"
ExpiresByType font/opentype "access plus 1 month"
ExpiresByType image/svg+xml "access plus 1 month"
</IfModule>
# ------------------------------------------------------------------------------
# | Filename-based cache busting |
# ------------------------------------------------------------------------------
# If you're not using a build process to manage your filename version revving,
# you might want to consider enabling the following directives to route all
# requests such as `/css/style.12345.css` to `/css/style.css`.
# To understand why this is important and a better idea than `*.css?v231`, read:
# http://stevesouders.com/blog/2008/08/23/revving-filenames-dont-use-querystring
# <IfModule mod_rewrite.c>
# RewriteCond %{REQUEST_FILENAME} !-f
# RewriteCond %{REQUEST_FILENAME} !-d
# RewriteRule ^(.+)\.(\d+)\.(js|css|png|jpg|gif)$ $1.$3 [L]
# </IfModule>
# ------------------------------------------------------------------------------
# | File concatenation |
# ------------------------------------------------------------------------------
# Allow concatenation from within specific CSS and JS files, e.g.:
# Inside of `script.combined.js` you could have
# <!--#include file="libs/jquery.js" -->
# <!--#include file="plugins/jquery.idletimer.js" -->
# and they would be included into this single file.
# <IfModule mod_include.c>
# <FilesMatch "\.combined\.js$">
# Options +Includes
# AddOutputFilterByType INCLUDES application/javascript application/json
# SetOutputFilter INCLUDES
# </FilesMatch>
# <FilesMatch "\.combined\.css$">
# Options +Includes
# AddOutputFilterByType INCLUDES text/css
# SetOutputFilter INCLUDES
# </FilesMatch>
# </IfModule>
# ------------------------------------------------------------------------------
# | Persistent connections |
# ------------------------------------------------------------------------------
# Allow multiple requests to be sent over the same TCP connection:
# http://httpd.apache.org/docs/current/en/mod/core.html#keepalive.
# Enable if you serve a lot of static content but, be aware of the
# possible disadvantages!
# <IfModule mod_headers.c>
# Header set Connection Keep-Alive
# </IfModule>
RewriteCond %{HTTP_HOST} ^lasercutting\.co\.uk$ [OR]
RewriteCond %{HTTP_HOST} ^www\.lasercutting\.co\.uk$
RewriteRule ^tube\-cutting\/$ "http\:\/\/www\.lasercutting\.co\.uk\/tube_cutting" [R=301,L]
以下是Apache错误日志所说的内容：
[Mon Oct 20 17:11:28.577595 2014] [core:alert] [pid 43615] [client 204.17.231.100:49936] /home/lasercut/public_html/.htaccess: Invalid command '\xef\xbb\xbf#', perhaps misspelled or defined by a module not included in the server configuration