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I recently updated the Twenty Thirteen theme on a self-hosted WordPress installation to v3.7, and in doing so accidentally lost changes I had made to the footer. I think I had previously implemented these changes by editing the footer.php file (under wp-content/themes/twentythirteen), but when I tried to mimic these edits in the footer.php now, the changes aren’t showing up on the website. Am I doing something wrong? Did WordPress change how the footer works in the current version of the theme? Any help is greatly appreciated – thanks!
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You need to use a child theme, for this very reason.
[https://developer.wordpress.org/themes/advanced-topics/child-themes/])
Also, 2013? That’s 10 years old, time to update!
I figured it out – it was the LiteSpeed Cache that was preventing me from seeing the changes.