How to get your post thumbnail’s width and height

In Settings > Media, you are able to set only the height or width of the Thumbnail images and WordPress will resize them proportionally (i.e.: if you have a fixed height, then the widths will vary depending on your uploaded image dimension, and vice versa).

Inside the loop, you can get a thumbnail’s width, height and URL using this code:

<pre>$imgdata = wp_get_attachment_image_src( get_post_thumbnail_id(), 'thumbnail' );
$imgurl = $imgdata[0]; // the url of the thumbnail picture
$imgwidth = $imgdata[1]; // thumbnail's width
$imgheight = $imgdata[2]; // thumbnail's height</pre>

For the second parameter of the wp_get_attachment_image_src function you can also use ‘medium’, ‘large’ and ‘full’. They correspond to the dimension for the other sizes in Settings > Media.


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