fix | bug in code

wp-content copy/db.php

@@ -0,0 +1,90 @@
+<?php
+/**
+ * Plugin Name: Query Monitor Database Class (Drop-in)
+ * Description: Database drop-in for Query Monitor, the developer tools panel for WordPress.
+ * Version:     3.16.3
+ * Plugin URI:  https://querymonitor.com/
+ * Author:      John Blackbourn
+ * Author URI:  https://querymonitor.com/
+ *
+ * *********************************************************************
+ *
+ * Ensure this file is symlinked to your wp-content directory to provide
+ * additional database query information in Query Monitor's output.
+ *
+ * @see https://querymonitor.com/help/db-php-symlink/
+ *
+ * *********************************************************************
+ *
+ * @package query-monitor
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+if ( ! defined( 'DB_USER' ) ) {
+	return;
+}
+
+if ( defined( 'QM_DISABLED' ) && QM_DISABLED ) {
+	return;
+}
+
+if ( defined( 'WP_INSTALLING' ) && WP_INSTALLING ) {
+	return;
+}
+
+if ( 'cli' === php_sapi_name() && ! defined( 'QM_TESTS' ) ) {
+	# For the time being, let's not load QM when using the CLI because we've no persistent storage and no means of
+	# outputting collected data on the CLI. This will hopefully change in a future version of QM.
+	return;
+}
+
+if ( defined( 'DOING_CRON' ) && DOING_CRON ) {
+	# Let's not load QM during cron events for the same reason as above.
+	return;
+}
+
+# Don't load QM during plugin updates to prevent function signature changes causing issues between versions.
+if ( is_admin() ) {
+	if ( isset( $_GET['action'] ) && 'upgrade-plugin' === $_GET['action'] ) {
+		return;
+	}
+
+	if ( isset( $_POST['action'] ) && 'update-plugin' === $_POST['action'] ) {
+		return;
+	}
+}
+
+// This must be required before vendor/autoload.php so QM can serve its own message about PHP compatibility.
+$qm_dir = dirname( dirname( __FILE__ ) );
+$qm_php = "{$qm_dir}/classes/PHP.php";
+
+if ( ! is_readable( $qm_php ) ) {
+	return;
+}
+require_once $qm_php;
+
+if ( ! QM_PHP::version_met() ) {
+	return;
+}
+
+if ( ! file_exists( "{$qm_dir}/vendor/autoload.php" ) ) {
+	add_action( 'all_admin_notices', 'QM_PHP::vendor_nope' );
+	return;
+}
+
+require_once "{$qm_dir}/vendor/autoload.php";
+
+// Safety check to ensure the autoloader is operational.
+if ( ! class_exists( 'QM_Backtrace' ) ) {
+	return;
+}
+
+if ( ! defined( 'SAVEQUERIES' ) ) {
+	define( 'SAVEQUERIES', true );
+}
+
+// phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited
+$wpdb = new QM_DB( DB_USER, DB_PASSWORD, DB_NAME, DB_HOST );