Commenti a: On the fly thumbnails generation with PHP

Di: Simon Poulston

Simon Poulston — Thu, 09 Feb 2012 16:42:00 +0000

Hi,

This code is good, however, I found that I got a much better image by using:

imagecopyresampled

instead of

imagecopyresized

I think that this may be due to the fact that I am using s GD version above 2.

Thanks

Di: bLuefRogX

bLuefRogX — Thu, 09 Feb 2012 22:48:00 +0000

Its not just disk space, it provides a better surfing experience for users as the pages load faster.

Di: Alessandro Pasotti

Alessandro Pasotti — Thu, 09 Feb 2012 09:35:00 +0000

Thanks to both commenters!

@dgm: the world is large, in my (very limited) experience disk space is the bottleneck, but of course it may vary depending on the number of page views and many other factors.

In case CPU is limited (or is the bottleneck), I would follow Dirk’s advice (and I really did it in a few projects).

Di: Dirk

Dirk — Thu, 09 Feb 2012 21:59:00 +0000

You forgot caching. Generating thumbs always new causes high CPU load. Ah, forgot, CPU is unlimited
But in case CPU power is limited:
build something like md5($name . $date . $widthNew . $heightNew) . “.jpg”, write it as file and before generating a new thumb check if this filename is present already.

Di: DGM

DGM — Thu, 09 Feb 2012 16:20:00 +0000

Many shared hosting problems have CPU sharing problems, but lots of disk space, the opposite of what you describe…