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In addition to www canonicalization, you can also canonicalize the HTTP protocol, redirecting HTTP to HTTPS (or vice versa) with .htaccess.
Here is a customized plug-n-play PHP script for reporting 404 errors via email. No editing required, just clean email alerts for each 404 error.
An important aspect of website security is protecting sensitive data such as your server statistics. Here is an important security tip for Plesk users.
For WordPress users there are at least three great plugins that make maintenance mode just dead-simple. Even so, here is how to do it with .htaccess.
Here are two simple techniques to fade in page content with jQuery. The fade-in effect isn’t for everyone, but it’s a nice tool to have in the box.
Here is a quick cheat-sheet for redirecting URLs with .htaccess.
During development there may be situations where you want to prevent WordPress from making URL requests to external websites. Here is a simple way to disable external URL requests during development.
Micro Tip for the day: slice of PHP code for viewing all WordPress query variables. Very useful for figuring out custom loops and such.
Here’s how to set the first attachment as the featured image for posts in WordPress. This is useful for User Submitted Posts, which attaches uploaded images to each submitted post.
Quick .htaccess snippet to disable browser caching by modifying Cache-Control, Pragma, and Expires headers. Strictly plug-n-play.
CSS transitions can add a nice effect to links. Here are some quick example snippets for your copy/paste enjoyment.