Exact image sizes

Question

I am trying to define an image size of exactly 290 height x 180 width for all images uploaded to my WP site. I tried updating image sizes under Settings->Media->Image Sizes but these are only max values and some images end up coming out at 290 x 155 etc, is there a way to force WP to create an image at my desired size?

I am not using post thumbnails, I have built a plugin that uses wp_get_attachment_image() to retrieve images.

Answer 1

You'll want to use add_image_size() in your functions.php to tell Wordpress you'd like it to create a new image size when you upload images:

add_image_size( 'custom_image_size_name', 290, 180, true );

Using the value true will tell Wordpress you want it to crop the image to those exact dimensions.

Once you do that and upload an image, you can use 'custom_image_size_name' in wp_get_attachment_image() to get the correct image.

Because Wordpress only creates the image sizes when you upload images, you'll want to use a plugin like AJAX Thumbnail Rebuild to rebuild previously uploaded images with your newly defined images size.