List of constants to add in wp-config.php
The functionality of ShortPixel Image Optimizer can be extended by defining constants on the wp-config.php file. What this means is that we can add several lines on the wp-config.php file to add some advanced features to the plugin.
First, locate the file, which must be on the root of your WordPress installation, and edit it. It is called wp-config.php:
Now, you should add each line that we will detail below, before the line that says
/* That's all, stop editing! Happy blogging. */
We will see an example later.
List of constants
If you have a theme which creates thumbnails that don't have the usual suffix (which is image-WWWxHHH, where WWW is the width and HHH the height of the image) and you want such thumbnails to be handled by ShortPixel too, you should add this line and add all the custom suffixes your theme is creating separated by commas. For example, this specific line will handle the images with the suffixes _tl and _tr, like image-100x100_tl.jpg or image-100x100_tr.jpg
This constant does the same as the previous but treating infixes. For example, custom thumbnails like image-uae-100x100.jpg
define('SHORTPIXEL_API_KEY', '<<your api key here>>');