November 2009
Beginner to intermediate
300 pages
5h 43m
English
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
CI's image class
Now that we have our file uploaded we can use CI's image class to manipulate it. This library works with the three most popular image libraries for PHP—GD/GD2, NetPBM, and ImageMagick. Use phpinfo() to find which of these is supported by your server. Image watermarking only works with GD/GD2, though:
The image manipulation class allows you to perform four basic functions with images:
- Resize: You may want to fit them into a standard size on your screen or you may want to cut them right down to thumbnail images
- Crop
- Rotate
- Watermark (only available with
GD/GD2): This is often used to put a copyright notice on an image so that people can't download it from your site and pass it as their own work
Note
The GD library is always needed in ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.