Posting Code Fragments On A Shared Server

Issue

Submitting a code fragment on a hosting service such as Namecheap causes a security error when posting things like SQL statements. 403 Forbidden error results.

Workaround

Update .htaccess on the site with the following:

<IfModule mod_security.c>
SecRuleEngine Off
SecRequestBodyAccess Off
</IfModule>

Source: Namecheap problem when posting data from html form (StackOverflow)