Are you or others receiving a 406 error when visiting your site? Most likely it is caused by mod_security, which acts as a firewall to protect web application...
406 Error Fix
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Website Development
Redirect Only Specific Files from HTTP to HTTPS
How to redirect only certain files from HTTP to the secure HTTPS via a .htaccess file. Thus individual files can only be accesses using a SSL connection.
“301” Redirects for SEO
How to setup a permanent “301” redirect using a .htaccess file. This will ensure that all requests coming in to your non-www domain will get redirected to www.
IE Changes EPS to PS Files when Downloading
If you link directly to an .EPS or .AI file for downloading on a website, you should note that Internet Explorer (6 & 7) doesn’t correctly handle these files.
Accessible Fonts; PX Vs. EMs
Switching to EMs instead of PX to set fonts sizes in websites enables more browsers to enlarge text, thus it makes sites more accessible to the vision impaired.
Using PHP on Pages with HTML Extensions
How to use PHP on HTML pages, as pages without a .php extension will not be parsed by PHP by default on most servers. Fix this by updating your .htaccess file.
Fix for PHP Mail Form Email Injection Hijack
Hijacking form mail scripts and spoofing domains/email is downright wrong. Fix your scripts It by stripping fields for carriage returns and newline characters.