Viewing posts tagged with github

Sparklines via PHP

Around 5 years ago I built a simple sparkline generation script in PHP. It wasn't very good, the lines were shaky even with antialias. During last weekend I thought I'd rebuild it from scratch to see how much better it would be second time around.

A few hours later and it was complete, the lines were thick, antialiased and almost identical in quality to the Google Image Charts version. I also added browser caching using the ETag header.

The key bit of logic that I failed to think of 5 years ago was to create the original sparkline larger than the desired size, then scale down by the same factor. The resizing naturally makes the lines smoother than imageantialias and imagesetthickness ever could.

Sparkline Examples

It's as easy as this to use:

<img src='sparkline.php?size=80x20&data=2,4,5,6,10,7,8,5,7,7,11,8,6,9,11,9,13,14,12,16&back=fff&line=5bb763&fill=d5f7d8' />

I use sparklines in a lot of my work related projects, as it's an intuitive way to display stats that only require a quick glance. Normally I'd use the Google Image Charts but has been depreciated since April 2012, and will become fully defunct in April 2015. Whilst there is the newer Google Charts library which uses HTML5, SVG, and JavaScript I prefer to use the image-only method for a leaner project with less bloat.

Check out the code on Github

20-Jun-2014 at 12:26pm

Xbox API Twitter Bot

Alan Wynn, who built and maintains the Unofficial Xbox API, gave me full access to his Twitter bot over the weekend after I suggested some improvements to the service.

In its original form you would send a Tweet to the bot in a certain format and it would look up the specified gamertag and reply to the tweet with their current online or offline status.

Xbox API Bot

My suggestion was that if the user is offline then it would continue to check the online status every minute and tweet when the gamer eventually came online. After a complete rebuild, and taking into account multiple requests for a single gamertag, having a 7 day limit to the checks and XboxAPI limit checks, it was complete.

Usage is really simple, just Tweet the following but be sure to replace 'Major Nelson' with any gamertag of your choosing. If it doesn't exist, you'll be notified by a Tweet.

@XboxAPI_Bot isonline Major Nelson

You can view the code on Github or send a Tweet to see it working in action.

29-Sep-2013 at 5:59pm

Minecraft Skin Preview via PHP

I've expanded on my Minecraft Avatar script I built a while back so that you can now display a skin preview for a given username, like so:

Minecraft Skin Preview

It's as easy as this to use:

<img src='skin.php?u={username}&s={size}' />

Just like the facial avatar, this script grabs their skin from the Minecraft server, and then creates the 4 different views, including facial accessories such as hats or glasses. If the username does not exist, then it uses the default skin, which is stored in a base64 encoded variable to save an extra cURL request.

View the code on Github

16-Sep-2013 at 6:57pm

PHP Blink(1) Class

I've been playing around and having quite a bit of fun with my Blink(1) by ThingM for some time now, and whilst the command line tool is very good, it's somewhat fiddly to send patterns. As a result, I build my own PHP class to interact with the CLI tool.

The example below simply fades to #F68 for 400ms, then fades to #0F1 for 400ms, and then fades to #F68 for 400ms, and this loops 3 times:

Blink::send('#F68,400|#0F1,400|#F68,400',3);

You can even go a step further an introduce a flicker effect by adding a quick fade to #000 between each light like so:

Blink::send('#F68,400|#000,50|#ff8920,400|#000,50|#F00,400',3);

The video below demonstrates all the examples as per example.php in the Github Repo

You can watch the video on Vimeo or view the code on Github.

26-Jul-2013 at 12:46pm

Thumbnail Creation via PHP

I got a bit tired of numerous security holes and sheer bulkiness of other thumbnail generation scripts, so decided to build my own from scratch, for local images only. Simply upload, create a writable cache directory and parse the image through the PHP script like so:

<img src='thumb.php?src=./images/photo.jpg&size=400x300' />

It's super simple and only 155 lines in total. You can specify the width and height, or just the width so the height will get calculated automatically and vice versa. It also allows you to set a maximum width/height, which is best suited for photo thumbnails.

Features:

  • File based cache
  • Automatic deletion of expired cache files
  • Optional browser based cache via the IF_MODIFIED_SINCE HTTP header
  • Multiple size types
  • Options whether to crop, trim, zoom and set alignment
  • Set sharpness based on a percentage midpoint between two values, so you can specify the strength of the sharpness rather than just turning it on or off

View the code and usage instructions on Github

18-Jul-2012 at 1:00pm