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wp-content/plugins/webp-express/lib/debug.php

@@ -0,0 +1,18 @@
+<?php
+
+if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly
+
+/*
+This file is actually not included, only when debugging activation errors, I include it manually.
+Haven't used it in a quite a while...
+*/
+
+function webpexpress_activated() {
+  update_option( 'webp-express-activation-error',  ob_get_contents() );
+}
+add_action( 'activated_plugin', 'webpexpress_activated' );
+if (!empty(get_option('webp-express-activation-error'))) {
+    add_filter( 'admin_footer_text', function() {
+        return 'Activation error:' . get_option('webp-express-activation-error');
+    });
+}