这是一个单文件处理缩略图的程序，直接引用生成缩略图。有点意思，主要是方便啦 .。
官方地址是：http://www.binarymoon.co.uk/projects/timthumb/
文件也很小，只有一点点大，更关键的是可以缓存回来。也能取远程的图片，也可以设置allow的安全站点，这样就相对安全一点了，官方这么介绍 ：
TimThumb is a simple, flexible, PHP script that resizes images. You give it a bunch of parameters, and it spits out a thumbnail image that you can display on your site.
TimThumb has seen a massive amount of use across the WordPress world, and a few months after we released it, I took over development from Tim, a friend of Darren Hoyts, who created the original script. Since I took over there have been a whole host of changes, bug fixes, and additions.
I set up this page to act as an archive/ resource, showing the best documentation and demos available for TimThumb. If you have any TimThumb related articles then please feel free to send them over to me so that I can add them to the list.
功能也相对比较方便，用法也很简单，官方现成就举了一些例子，并通过这些例子介绍了它的参数：
How to use TimThumb
- Timthumb 101: Parameters listing
- Getting Started with TimThumb - basic examples
- Resizing External Images - external images demo
- Image Filters and Editing - filters sample
- Changing the Image Cropping Location - crop location demo
- Image Scaling
- TimThumb Hints and Tips
看了上面的使用方法，再看看，这个，你就知道很多常见的方法和用法了：
| stands for | values | What it does | |
|---|---|---|---|
| src | source | url to image | Tells TimThumb which image to resize › tutorial |
| w | width | the width to resize to | Remove the width to scale proportionally (will then need the height) › tutorial |
| h | height | the height to resize to | Remove the height to scale proportionally (will then need the width) › tutorial |
| q | quality | 0 - 100 | Compression quality. The higher the number the nicer the image will look. I wouldn't recommend going any higher than about 95 else the image will get too large › tutorial |
| a | alignment | c, t, l, r, b, tl, tr, bl, br | Crop alignment. c = center, t = top, b = bottom, r = right, l = left. The positions can be joined to create diagonal positions › tutorial |
| zc | zoom / crop | 0, 1, 2, 3 | Change the cropping and scaling settings › tutorial |
| f | filters | too many to mention | Let's you apply image filters to change the resized picture. For instance you can change brightness/ contrast or even blur the image › tutorial |
| s | sharpen | Apply a sharpen filter to the image, makes scaled down images look a little crisper › tutorial | |
| cc | canvas colour | hexadecimal colour value (#ffffff) | Change background colour. Most used when changing the zoom and crop settings, which in turn can add borders to the image. |
| ct | canvas transparency | true (1) | Use transparency and ignore background colour |
参数很简单，就是不太好记。。。纠结啊
不过用起来的话，是真心简单