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 that 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.

Now, you must add each line before the line that says

/* That's all, stop editing! Happy blogging. */

We will see an example later.

List of constants

define('SHORTPIXEL_CUSTOM_THUMB_SUFFIXES', '_tl,_tr');

If you have a theme which creates thumbnails that don't have the usual suffix image-WWWxHHH.jpg, where WWW is the width and HHH is 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, the line above will handle the images with the suffixes _tl and _tr, like image-100x100_tl.jpg or image-100x100_tr.jpg

define('SHORTPIXEL_CUSTOM_THUMB_INFIXES', '-uae');

This constant does the same as the previous but treating infixes. For example, custom thumbnails like image-uae-100x100.jpg

define('SHORTPIXEL_USE_DOUBLE_WEBP_EXTENSION', true);

define('SHORTPIXEL_API_KEY', '<<your api key here>>');

define('SHORTPIXEL_HIDE_API_KEY', true);
	

define("SHORTPIXEL_NOFLOCK", true);
		

define("SHORTPIXEL_EXPERIMENTAL_SECURICACHE", true);
			

define('SHORTPIXEL_CFTOKEN', '<<the Cloudflare API token that has Purge Cache right>>');
define('SHORTPIXEL_CFZONE', '<<The Zone ID from the domain settings in Cloudflare>>');
		

define('SHORTPIXEL_NO_BANNER', true);