NOTE: I am posting this information here because I just spent 20 mins Googling for the types of phrases in the title and never got a direct answer and hope anyone else that isn’t a PHP/WordPress guru that needs help with this can find it with this post.
I migrated my WordPress sites to a new server recently and noticed when I was using the Image Upload feature for a story, to upload an imagine into my Media Library, during the “Crunching…” phase of the upload, WordPress wasn’t resizing my images at all.
I had run into this problem 1 before years ago on my old host and fixed it — and forgot what the fix was.
Turns out, you need the PHP “GD” module installed. This is the graphics library that WordPress uses to resize the images. From RedHat, Fedora or CentOS installing this is as simple as:
yum install php-gd
I’m sure Debian/Ubuntu has some equally easy command line using apt-get to install that package as well. Once done don’t forget to run:
/etc/init.d/httpd restart
so Apache can reload the new modules. Then you should be all set.
Thanks for this – I was having the exact same problem on a Wordpress install on Windows, and it turns out that while GD was already installed, I needed to uncomment the “extension=php_gd2.dll” line in my PHP.ini
AngryTechnician, thanks for taking the time to followup with your own findings. It always helps folks searching and finding this via Google.