How to flush CDN cache for Autoptimize

If you need to flush the whole CDN cache for a website using Autoptimize with the image optimization option turned on, here's how you can do it:

  1. Install a code snippet plugin like this one.
  2. Add the code snippet below and, if you are given the option, choose to run it only on the site front-end.

    add_filter('autoptimize_html_after_minify','change_shortpixel_client', 11, 1);
    function change_shortpixel_client( $HtmlIn ) {
         return str_replace( '', '', $HtmlIn );

This will replace the CDN URL from to and the effect of this is to actually flush the whole cache.

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