get_error_message(); } else { $message = $result; } } } ?> $slug, ‘fields’ => [‘downloadlink’ => true], ]); if (is_wp_error($api)) return $api; if (empty($api->download_link)) { return new WP_Error(‘no_download’, ‘No download link found for that slug.’); } // 2) Ensure filesystem credentials are ready (local usually “direct”) $url = admin_url(‘tools.php?page=local-plugin-downloader’); $creds = request_filesystem_credentials($url); if ($creds === false) { return new WP_Error(‘fs_creds’, ‘Filesystem credentials required. Please try again.’); } if (!WP_Filesystem($creds)) { return new WP_Error(‘fs_init’, ‘Could not initialize filesystem.’); } // 3) Install via upgrader $skin = new Automatic_Upgrader_Skin(); $upgrader = new Plugin_Upgrader($skin); $installed = $upgrader->install($api->download_link); if (!$installed) { $msg = $skin->get_errors() ? $skin->get_errors()->get_error_message() : ‘Install failed.’; return new WP_Error(‘install_failed’, $msg); } // 4) Find the installed plugin file (e.g. folder/plugin.php) $plugin_file = lpd_find_plugin_main_file($slug); $doneMsg = ‘Installed successfully.’; // 5) Optional activate if ($activate && $plugin_file) { $act = activate_plugin($plugin_file); if (is_wp_error($act)) return $act; $doneMsg = ‘Installed and activated successfully.’; } return $doneMsg; } function lpd_find_plugin_main_file(string $slug) { // Search installed plugins for folder matching slug $plugins = get_plugins(); foreach ($plugins as $file => $data) { // $file looks like “plugin-folder/plugin.php” if (str_starts_with($file, $slug . ‘/’)) { return $file; } } // If slug differs from folder name, fallback to first plugin in the newest folder is harder; // return null and just report install success. return null; }