Add Super Page Cache purger script and copy /etc/demyx directory with proper ownership

Author: demyxco

CHANGELOG.md

@@ -1,5 +1,7 @@
 # CHANGELOG
-Entries before tag-* affects all tags. 
+Entries before tag-* affects all tags.
+## 2026-05-14
+- Added a cache purger script for the Super Page Cache plugin
 ## 2026-05-11
 - Update `tag-latest/Dockerfile` to force `error_log = /proc/self/fd/2` in both `/etc/php83/php-fpm.conf` and `/etc/php84/php-fpm.conf`
 - Update `tag-latest/bin/demyx-sudo` PHP switcher to create `/var/log/php83/error.log` and set ownership to `demyx:demyx` so non-root PHP-FPM startup does not fail on default Alpine log path

tag-latest/Dockerfile

@@ -158,6 +158,7 @@ RUN set -ex; \
 
 # Imports
 COPY bin /usr/local/bin
+COPY --chown=demyx:demyx etc /etc/demyx
 
 # Finalize
 RUN set -ex; \

tag-latest/etc/wp-cloudflare-page-cache-purge.php

@@ -0,0 +1,85 @@
+<?php
+
+declare(strict_types=1);
+
+if (PHP_SAPI !== 'cli') {
+    fwrite(STDERR, "Error: wp-cloudflare-page-cache-purge.php can only be run from CLI.\n");
+    exit(1);
+}
+
+$demyxPath = getenv('DEMYX');
+
+if (!is_string($demyxPath) || trim($demyxPath) === '') {
+    fwrite(STDERR, "Error: DEMYX environment variable is not set. It must point to your WordPress root path.\n");
+    exit(2);
+}
+
+$demyxPath = rtrim(trim($demyxPath), '/');
+$wpLoadPath = $demyxPath . '/wp-load.php';
+$wpConfigPath = $demyxPath . '/wp-config.php';
+
+if (!is_file($wpLoadPath)) {
+    fwrite(STDERR, "Error: WordPress bootstrap file not found at {$wpLoadPath}.\n");
+    exit(2);
+}
+
+/**
+ * advanced-cache.php runs early and expects HTTP server vars.
+ * In CLI they are usually absent, so provide safe defaults.
+ */
+if (!isset($_SERVER['REQUEST_METHOD'])) {
+    $_SERVER['REQUEST_METHOD'] = 'GET';
+}
+
+if (!isset($_SERVER['REQUEST_URI'])) {
+    $_SERVER['REQUEST_URI'] = '/';
+}
+
+if (!isset($_SERVER['HTTP_HOST']) || $_SERVER['HTTP_HOST'] === '') {
+    $host = '';
+
+    if (is_file($wpConfigPath) && is_readable($wpConfigPath)) {
+        $wpConfigContent = file_get_contents($wpConfigPath);
+
+        if (is_string($wpConfigContent)) {
+            if (preg_match("/define\\(\\s*['\\\"]WP_HOME['\\\"]\\s*,\\s*['\\\"]https?:\\/\\/([^'\\\"\\/]+)['\\\"]/i", $wpConfigContent, $matches) === 1) {
+                $host = $matches[1];
+            } elseif (preg_match("/define\\(\\s*['\\\"]WP_SITEURL['\\\"]\\s*,\\s*['\\\"]https?:\\/\\/([^'\\\"\\/]+)['\\\"]/i", $wpConfigContent, $matches) === 1) {
+                $host = $matches[1];
+            }
+        }
+    }
+
+    if ($host === '') {
+        $host = 'localhost';
+    }
+
+    $_SERVER['HTTP_HOST'] = $host;
+}
+
+if (!isset($_SERVER['SERVER_NAME']) || $_SERVER['SERVER_NAME'] === '') {
+    $_SERVER['SERVER_NAME'] = $_SERVER['HTTP_HOST'];
+}
+
+if (!isset($_SERVER['HTTPS'])) {
+    $_SERVER['HTTPS'] = 'on';
+}
+
+require_once $wpLoadPath;
+
+global $sw_cloudflare_pagecache;
+
+if (!isset($sw_cloudflare_pagecache) || !($sw_cloudflare_pagecache instanceof SW_CLOUDFLARE_PAGECACHE)) {
+    fwrite(STDERR, "Error: Super Page Cache plugin is not loaded or active in this WordPress install.\n");
+    exit(3);
+}
+
+$purgeResult = $sw_cloudflare_pagecache->get_cache_controller()->purge_all(false, false);
+
+if ($purgeResult === true) {
+    fwrite(STDOUT, "Cache purged successfully.\n");
+    exit(0);
+}
+
+fwrite(STDERR, "Error: Cache purge failed. Check Super Page Cache logs for details.\n");
+exit(4);