Adjusting the WordPress thumbnail threshhold

July 17, 2006 | 2 Comments

Long title for a simple problem. If you are using WordPress and are annoyed that it won’t generate thumbnails for pictures larger than 3 megapixels, the place to change this is wp-admin/inline-uploading.php . The line in question reads (line 87 in my copy):

if ( $imagedata['width'] * $imagedata['height'] < 3 * 1024 * 1024 ) {

Change the 3 to 4 or 5 or what have you. You don’t want to go too crazy since there are some valid concerns about memory consumption and speed. PHP has some configuration for how much memory a script my use (“memory_limit” in my php.ini) so you might have to raise this as well. Currently I’m resizing 4 megapixel images with the default 8mb memory limit without any problems.


  1. Thanks, this was very helpful!

    Comment by Björn — August 13, 2006 #

  2. Once you know these values, is becomes fairly simple to make adjustments.

    Comment by Matawhali — November 30, 2007 #

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