From 11386c73109e71c6245c43015168b2a25a936171 Mon Sep 17 00:00:00 2001
From: Sainath Poojary <spoojary614@gmail.com>
Date: Wed, 15 Jul 2026 20:53:45 +0530
Subject: [PATCH 1/2] Comment: Use wp_parse_url() instead of parse_url()

---
 src/wp-includes/comment.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/wp-includes/comment.php b/src/wp-includes/comment.php
index 20303dc1e7e17..b2a3db02bce49 100644
--- a/src/wp-includes/comment.php
+++ b/src/wp-includes/comment.php
@@ -2931,7 +2931,7 @@ function discover_pingback_server_uri( $url, $deprecated = '' ) {
 	$pingback_str_squote = 'rel=\'pingback\'';
 
 	/** @todo Should use Filter Extension or custom preg_match instead. */
-	$parsed_url = parse_url( $url );
+	$parsed_url = wp_parse_url( $url );
 
 	if ( ! isset( $parsed_url['host'] ) ) { // Not a URL. This should never happen.
 		return false;

From 0f1e977b22a011feb7c7fbb3964fe1225a55d78e Mon Sep 17 00:00:00 2001
From: Sainath Poojary <spoojary614@gmail.com>
Date: Wed, 15 Jul 2026 20:53:54 +0530
Subject: [PATCH 2/2] Tests: Add unit tests for discover_pingback_server_uri()

---
 .../comment/discoverPingbackServerUri.php     | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 tests/phpunit/tests/comment/discoverPingbackServerUri.php

diff --git a/tests/phpunit/tests/comment/discoverPingbackServerUri.php b/tests/phpunit/tests/comment/discoverPingbackServerUri.php
new file mode 100644
index 0000000000000..e172f18c31590
--- /dev/null
+++ b/tests/phpunit/tests/comment/discoverPingbackServerUri.php
@@ -0,0 +1,38 @@
+<?php
+
+/**
+ * @group comment
+ * @covers ::discover_pingback_server_uri
+ *
+ * @ticket 31384
+ */
+class Tests_Comment_DiscoverPingbackServerUri extends WP_UnitTestCase {
+
+	public function set_up() {
+		parent::set_up();
+		add_filter( 'pre_http_request', array( $this, 'mock_http_request' ) );
+	}
+
+	public function tear_down() {
+		remove_filter( 'pre_http_request', array( $this, 'mock_http_request' ) );
+		parent::tear_down();
+	}
+
+	public function mock_http_request() {
+		return array(
+			'headers'  => array(),
+			'body'     => '<link rel="pingback" href="https://example.com/pingback" />',
+			'response' => array( 'code' => 200 ),
+			'cookies'  => array(),
+		);
+	}
+
+	/**
+	 * @ticket 31384
+	 */
+	public function test_discovers_pingback_uri_for_schemeless_url() {
+		$result = discover_pingback_server_uri( '//example.com/post' );
+
+		$this->assertSame( 'https://example.com/pingback', $result );
+	}
+}