.htaccess

SetEnv ALLOW_OVERWRITE On
SetEnv HTTP_MOD_GZIP Off

# You can define various environments and load the correponding config files:
# If not set, application/config/config.php
# application/config/development/config.php
# application/config/testing/config.php
# application/config/production/config.php
#SetEnvIf Host localhost CI_ENV=development
#SetEnvIf Host localhost CI_ENV=testing
#SetEnvIf Host localhost CI_ENV=production

<IfModule mod_rewrite.c>
    Options +FollowSymLinks

    RewriteEngine On
    # Tell PHP that the mod_rewrite module is ENABLED.
    SetEnv HTTP_MOD_REWRITE On

    # Example showing how to force HTTPS
    #RewriteCond %{HTTPS} !=on
    #RewriteRule ^(.*) https://%{SERVER_NAME}%{REQUEST_URI} [R,QSA,L,NE]

    #Remove index.php from URL
    RewriteCond $1 !^(index\.php|(.*)\.images|css|js|robots\.txt|favicon\.ico)
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ ./index.php?$1 [L,QSA]
</IfModule>
 
<IfModule !mod_rewrite.c> 
    # Without mod_rewrite, route 404's to the front controller
    SetEnv HTTP_MOD_REWRITE Off
    ErrorDocument 404 "Error : Module rewrite is not available. Please check your system with requirements.php"
 </IfModule>

<IfModule mod_headers.c>
    <FilesMatch "\.(php|xls|xlsx)$">
        Header set Cache-Control "private, no-cache, no-store, proxy-revalidate, no-transform, must-revalidate"
        Header set Pragma "no-cache"
    </FilesMatch>
</IfModule>

<IfModule mod_deflate.c>
    SetEnv HTTP_MOD_GZIP On
</IfModule>
<IfModule !mod_headers.c>
    #On WAMP, Deflate module needs mod_headers, otherwise it cause an error 500
    SetEnv HTTP_MOD_GZIP Off
</IfModule>

<IfModule mod_headers.c>
    <IfModule mod_deflate.c>
        <IfModule mod_filter.c>
            SetOutputFilter DEFLATE
            AddOutputFilterByType DEFLATE text/html text/css text/plain text/xml application/x-javascript
        </IfModule>
    </IfModule>
</IfModule>

<ifModule mod_gzip.c>
    #Enable compression if available
    SetEnv HTTP_MOD_GZIP On
    mod_gzip_on Yes
    mod_gzip_dechunk Yes
    mod_gzip_item_include file .(html?|txt|css|js|php)$
    mod_gzip_item_include handler ^cgi-script$
    mod_gzip_item_include mime ^text/.*
    mod_gzip_item_include mime ^application/x-javascript.*
    mod_gzip_item_exclude mime ^image/.*
    mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*
</ifModule>

# Explicitly add MIMETYPE for fonts
<IfModule mod_mime.c>
    AddType font/ttf .ttf
    AddType font/eot .eot
    AddType font/otf .otf
    AddType font/woff .woff
    AddType font/woff2 .woff2   
</ifModule>