Code
Get it while it’s hot: User Spam Remover for WordPress
I’m releasing a WordPress plugin that I wrote to tackle the scourge of user registration spam — those annoying bots that linkspam the WordPress registration form.
If you need a way to silently and automatically delete these spam accounts, and block the new user notification e-mail that WordPress normally sends, check out User Spam Remover. more …
HTML Minify for WordPress and WP Super Cache: Now a plugin!
It’s been a while, but I’ve updated my code that adds Minify to WP Super Cache, making everyone’s favorite WordPress caching plugin that much better.
What’s better is that my code now operates as a fully fledged plugin to Super Cache, so it’s now a drop-in install (no more patches!). Go to WPSCMin’s project page for all the info. more …
Replacing MacBook’s AirPort card with an Atheros AR5BXB6 from an IBM Thinkpad
Four years of 85°C CPU temperatures took their toll on my friend’s MacBook. Her AirPort wireless card still functioned, but suddenly her wifi signal had become unusably weak.
I checked her system configuration, opened up her first-gen MacBook, and everything looked fine. But with plenty of others reporting similar issues, it was most likely the card had succumbed to heat. It could sometimes maintain normal wireless range for several minutes — when started totally cold — but after the system temps warmed up, would go back to only a few feet of range.
The model number printed on the AirPort card is an Atheros AR5BXB6. A Google Products search for “AR5BXB6” turned up these $13 Thinkpad pulls among others available online, and for $13 we figured it was easily worth a shot as a drop-in replacement, compared to the cost of a new Apple card. It turned out be only a little tricksier than that. more …
Better Google Analytics JavaScript that doesn’t block page downloading
If you saw Steve Souders’ March 5 talk at Google and have ever used Google Analytics, then you were probably amused when he used GA’s JavaScript insertion code as his “wrong” counterexample. Well, at least I was, and somebody else mentioned it in the Q&A so I figure I’m not the only one.
The GA insertion code that Google gives you to put on your site does a couple of bad things: First, it uses document.write, and second, it loads ga.js directly, which blocks browsers from doing any page rendering or downloading of other page components (images, scripts, stylesheets) during the whole time it takes ga.js to download and execute. In other words, Google Analytics makes your pages load slower!
Using Steve’s best practices, I’ve coded up a better version that does DOM insertion of the script tag and uses the “script onload” technique to initialize the tracker, so that it doesn’t block I/O, and you can inline it anywhere on the page or even load it from an external file. You can choose to lazy-load GA whenever you want — for instance, even after window.onload fires — so that it’s totally asynchronous and doesn’t interfere with page rendering at all. more …
Optimize all your PNG and JPEG images with one command using imgopt
Here’s something useful for the web developers out there. It’s a script I’ve been using for a while that makes it super-easy to losslessly compress entire folders of PNG and JPEG files for the web.
If you’re familiar with PNG optimization, then you know about programs like advpng, optipng and pngout that optimize and recompress PNG files, making them much smaller than the likes of Photoshop can. My shell script combines all three of these utilities to achieve minimum file size, while hiding their command-line syntax and adding the ability to recursively process entire directory trees.
And, it works with JPEGs, too! It uses jpegtran (included with libjpeg) and another small utility I’ve included to optimize and strip all metadata from JPEG files. Since my script searches directories recursively, all you need to do is type, say, imgopt myproj/htdocs and it’ll take care of your entire website.
All compression is lossless, which means no pixels are changed and no information is lost, the files just get smaller — chances are your layout can shrink by as much as 50%, which is like getting free bandwidth, and it means your site will snap into place that much faster for users. more …
Update to HTML Minify for WordPress and WP Super Cache
No big news here, but I’ve got an updated patch if you want to use my mod to add Minify to WordPress and WP Super Cache. For more information, check out my original explanation and instructions post, which I’ve updated with links to the new files. more …
How to losslessly concatenate / merge MP3 files
You’d think it would be very easy to combine multiple MP3 files into one, while preserving all the ID3 tag metadata and without re-encoding the audio (which is lossy). Well, it actually isn’t that hard at all, but since Google couldn’t find the answer for me, I thought I’d write it up. more …
How to transfer domains away from GoDaddy
It’s Super Bowl Sunday, a day I particularly enjoy transferring domain names out of GoDaddy, the registrar that once tempted me with low prices but now mostly just annoys me. Here’s how to move your domains to a new registrar quickly, easily and without fouling anything up (you don’t want your website to disappear!) in the process. more …
Minify for WordPress and WP Super Cache
I’ve integrated Minify and all its bandwidth-saving goodness into WP Super Cache, everyone’s favorite way of sending WordPress pages as super-fast static HTML, thereby saving visitors having to hit up the PHP interpreter (ugh!) or WordPress itself (double ugh!).
What does this mean? Well, it means your HTML (and gzipped HTML) pages can be 5-20% smaller with just a few minutes’ setup. If that sounds good, skip to the install instructions. If you want to hear more blabber first, read on. more …
Gzip compression levels for static-cached HTML
I was reading through the source of WP Super Cache recently, and noticed that it was using a gzip compression level of “1″ (the lowest) to compress its static-cached HTML pages. Level 1? Why not 3 or 6 (the default) or 9?
These pages are compressed and saved once on the server, and then sent many times to user’s browsers. So, what compression level makes the most sense for pre-compressed HTML? more …