remove-old-mu-plugins.php

<?php
/**
 * Pressable Cache Managemenet - Remove mu-plugins added by the old version of the plugin.
 *
 * @package Pressable
 */

// Disable direct file access.
if ( ! defined( 'ABSPATH' ) ) {
	exit();
}

// Run legacy cleanup only once — 6.1.0 adds the underscore file cleanup pass.
$pcm_migration_version = get_option( 'pcm_migration_version', '0' );
$pcm_migration_target  = '6.1.0';
if ( version_compare( $pcm_migration_version, $pcm_migration_target, '<' ) ) {

	// Library that writes/removes the batcache function to wp-config.php.
	require_once plugin_dir_path( __FILE__ ) . 'admin/custom-functions/wp-write-to-file-lib.php';

	/*
	 * Remove Batcache extending.
	 * Remove Batcache extending from wp-config.php file.
	 */
	global $wp_rewrite;
	$global_config_file = file_exists( ABSPATH . 'wp-config.php' ) ? ABSPATH . 'wp-config.php' : dirname( ABSPATH ) . '/wp-config.php';

	if ( apply_filters( 'wpsc_enable_wp_config_edit', true ) ) {
		$line = 'global $batcache; if ( is_object($batcache) ) { $batcache->max_age = 86400; $batcache->seconds = 3600;  };';
		// phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents
		if ( strpos( file_get_contents( $global_config_file ), $line ) !== false && ( ! is_writeable_wp_config( $global_config_file ) || ! wp_config_file_replace_line( 'global *\$batcache; if *\( *is_object', '', $global_config_file ) ) ) {
			wp_die( esc_html( "Could not remove Extending Batcache settings from $global_config_file. Please edit that file and remove the line containing the function 'global  \$batcache;'. Then refresh this page or contact Pressable Support for help." ) );
		}
	}

	/**
	 * Removes mu-plugins from the old mu-plugins directory
	 * to prevent any conflict due to the new mu-plugins folder
	 * which is created to store mu-plugins.
	 */

	// Legacy root-level mu-plugins (CDN era).
	$mu_plugins = array( 'cdn_exclude_specific_file.php', 'cdn_exclude_css.php', 'cdn_exclude_jpg_png_webp.php', 'cdn_exclude_js_json.php', 'cdn_extender.php' );

	// Legacy root-level mu-plugin (underscore era, replaced by pcm-batcache-manager.php).
	$mu_plugins[] = 'pcm_batcache_manager.php';

	global $wp_filesystem;
	if ( empty( $wp_filesystem ) ) {
		require_once ABSPATH . '/wp-admin/includes/file.php';
		WP_Filesystem();
	}

	// phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited
	foreach ( $mu_plugins as $mu_plugin ) {
		$file = WP_CONTENT_DIR . '/mu-plugins/' . $mu_plugin;
		if ( $wp_filesystem->exists( $file ) ) {
			$wp_filesystem->delete( $file );
		}
	}

	// Legacy underscore-named files inside mu-plugins/pressable-cache-management/.
	// Remove the old names so both versions do not load simultaneously on upgraded installs.
	$legacy_sub_mu_plugins = array(
		'pcm_extend_batcache.php',
		'pcm_exclude_pages_from_batcache.php',
		'pcm_exclude_query_string_gclid.php',
		'pcm_cache_wpp_cookies_pages.php',
	);

	$sub_dir = WP_CONTENT_DIR . '/mu-plugins/pressable-cache-management';
	if ( $wp_filesystem->is_dir( $sub_dir ) ) {
		foreach ( $legacy_sub_mu_plugins as $legacy_file ) {
			$path = $sub_dir . '/' . $legacy_file;
			if ( $wp_filesystem->exists( $path ) ) {
				$wp_filesystem->delete( $path );
			}
		}
	}

	update_option( 'pcm_migration_version', $pcm_migration_target );
}