PHP GD库，在图像周围放置白色区域

Question

I am exporting some images from flash and then resizing them in php. I am using the GD library to do this. However, I am having some difficulty getting the sizes right... some are landscape, some are portrait and I have even sized divs that they need to be put into.

So, when I resize them to a certain height there are some that are (for example) 150px x 30px and some that are 30px x 150px. The problem is with vertical alignment in the css.

I figure the solution is to just put whitespace around the images so that they all measure the same width and height but with the image centered in the middle vertically and horizontally.

What is the best way to do this with the GD library?

Answer 1

Here is a link to a function I wrote, that will help you resize any sized image to any arbitrary size. The function also allows you to either crop-to-fit, or letterbox your image in order to make it fit the desired aspect ratio.

https://www.spotlesswebdesign.com/blog.php?id=1

If this helps, please select the check mark next to this answer. Thanks!