From 5a42367752fce88e67efb1ee6675fa4ad811d4fc Mon Sep 17 00:00:00 2001
From: ArkaPrabhaChowdhury <arkopra@gmail.com>
Date: Fri, 7 Aug 2026 17:33:17 +0530
Subject: [PATCH 1/2] Administration: Guard network admin bootstrap on single
 sites

---
 src/wp-admin/network/admin.php               |  7 +--
 tests/phpunit/tests/admin/wpNetworkAdmin.php | 55 ++++++++++++++++++++
 2 files changed, 59 insertions(+), 3 deletions(-)
 create mode 100644 tests/phpunit/tests/admin/wpNetworkAdmin.php

diff --git a/src/wp-admin/network/admin.php b/src/wp-admin/network/admin.php
index 30332152ec69c..927f5da51ee2c 100644
--- a/src/wp-admin/network/admin.php
+++ b/src/wp-admin/network/admin.php
@@ -9,14 +9,15 @@
 
 define( 'WP_NETWORK_ADMIN', true );
 
-/** Load WordPress Administration Bootstrap */
-require_once dirname( __DIR__ ) . '/admin.php';
-
+/** Load WordPress Bootstrap */
+require_once dirname( __DIR__, 2 ) . '/wp-load.php';
 // Do not remove this check. It is required by individual network admin pages.
 if ( ! is_multisite() ) {
 	wp_die( __( 'Multisite support is not enabled.' ) );
 }
 
+/** Load WordPress Administration Bootstrap */
+require_once dirname( __DIR__ ) . '/admin.php';
 $redirect_network_admin_request = ( 0 !== strcasecmp( $current_blog->domain, $current_site->domain ) || 0 !== strcasecmp( $current_blog->path, $current_site->path ) );
 
 /**
diff --git a/tests/phpunit/tests/admin/wpNetworkAdmin.php b/tests/phpunit/tests/admin/wpNetworkAdmin.php
new file mode 100644
index 0000000000000..1985d3938aaaa
--- /dev/null
+++ b/tests/phpunit/tests/admin/wpNetworkAdmin.php
@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * Tests for the network administration bootstrap.
+ *
+ * @package WordPress
+ * @subpackage Administration
+ */
+
+/**
+ * Tests for the network administration bootstrap.
+ */
+class Tests_Admin_NetworkAdmin extends WP_UnitTestCase {
+
+	/**
+	 * Tests that plugin pages are not loaded on a single site.
+	 *
+	 * @ticket 38076
+	 *
+	 * @runInSeparateProcess
+	 * @preserveGlobalState disabled
+	 */
+	public function test_plugin_pages_are_not_loaded_on_a_single_site() {
+		if ( is_multisite() ) {
+			$this->markTestSkipped( 'This test is for single site installations.' );
+		}
+
+		$plugin_page_loaded = false;
+		add_action(
+			'network_admin_menu',
+			function () use ( &$plugin_page_loaded ) {
+				add_menu_page(
+					'Test Plugin Page',
+					'Test Plugin Page',
+					'manage_options',
+					'test-plugin-page',
+					function () use ( &$plugin_page_loaded ) {
+						$plugin_page_loaded = true;
+					}
+				);
+			}
+		);
+
+		$_GET['page'] = 'test-plugin-page';
+
+		try {
+			require ABSPATH . 'wp-admin/network/admin.php';
+			$this->fail( 'The network administration bootstrap should stop on a single site.' );
+		} catch ( WPDieException $exception ) {
+			$this->assertSame( 'Multisite support is not enabled.', $exception->getMessage() );
+		}
+
+		$this->assertFalse( $plugin_page_loaded );
+	}
+}

From 9f88918b09aaaf0333efa8540627d88a5ac24f77 Mon Sep 17 00:00:00 2001
From: ArkaPrabhaChowdhury <arkopra@gmail.com>
Date: Fri, 7 Aug 2026 18:08:00 +0530
Subject: [PATCH 2/2] Administration: Avoid reloading WordPress in network
 bootstrap

---
 src/wp-admin/network/admin.php | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/wp-admin/network/admin.php b/src/wp-admin/network/admin.php
index 927f5da51ee2c..5c191d78fc320 100644
--- a/src/wp-admin/network/admin.php
+++ b/src/wp-admin/network/admin.php
@@ -9,8 +9,10 @@
 
 define( 'WP_NETWORK_ADMIN', true );
 
-/** Load WordPress Bootstrap */
-require_once dirname( __DIR__, 2 ) . '/wp-load.php';
+if ( ! defined( 'ABSPATH' ) ) {
+	/** Load WordPress Bootstrap */
+	require_once dirname( __DIR__, 2 ) . '/wp-load.php';
+}
 // Do not remove this check. It is required by individual network admin pages.
 if ( ! is_multisite() ) {
 	wp_die( __( 'Multisite support is not enabled.' ) );