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wp-content/plugins/pressable-cache-management/remove_mu_plugins_batcache_on_uninstall.php

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+<?php //  Called by uninstall.php to remove all Pressable Cache Management MU plugins when plugin is uninstalled
+
+// disable direct file access
+if (!defined('ABSPATH'))
+{
+    exit;
+}
+
+/*
+ * Remove Pressable Cache Management mu-plugins 
+ */
+
+//Remove  Pressable Cache Management mu-plugin index
+$pcm_mu_plugin_index = WP_CONTENT_DIR . '/mu-plugins/pressable-cache-management.php';
+if (file_exists($pcm_mu_plugin_index ))
+{
+    unlink($pcm_mu_plugin_index );
+}
+
+$pcm_cache_mu_plugins = WP_CONTENT_DIR . '/mu-plugins/pressable-cache-management';
+if (file_exists($pcm_cache_mu_plugins))
+{
+    rrmdir($pcm_cache_mu_plugins);
+}
+
+function rrmdir($dir) {
+    if (is_dir($dir)) {
+        $objects = scandir($dir);
+        foreach ($objects as $object) {
+            if ($object != "." && $object != "..") {
+                if (is_dir($dir."/".$object))
+                    rrmdir($dir."/".$object);
+                else
+                    unlink($dir."/".$object);
+                    wp_cache_flush();
+            }
+        }
+        rmdir($dir);
+    }
+}
+
+
+//Remove batcache manager plugin from mu-plugins directory
+$mu_plugins = ['pcm_batcache_manager.php'];
+
+foreach ($mu_plugins as $mu_plugin)
+{
+    $file = WP_CONTENT_DIR . '/mu-plugins/' . $mu_plugin;
+    if (file_exists($file))
+    {
+        unlink($file);
+    }
+}