diff --git a/lib/BuiltinInternalArgInfo.php b/lib/BuiltinInternalArgInfo.php
index 788fe00539e..5deb7132b82 100644
--- a/lib/BuiltinInternalArgInfo.php
+++ b/lib/BuiltinInternalArgInfo.php
@@ -121,6 +121,8 @@ public static function stubReturnTypeLabelForFunction(string $callableLc): ?stri
             'stream_context_create' => '',
             // ext/standard/streamsfuncs.stub.php — no return type; InternalArgInfo says resource (#27848)
             'stream_socket_client' => '',
+            // ext/standard/streamsfuncs.stub.php — no return type; InternalArgInfo says resource (#28857)
+            'stream_socket_server' => '',
             // ext/standard/proc_open.stub.php — no return type; InternalArgInfo says resource (#27847)
             'proc_open' => '',
             // ext/standard/streamsfuncs.stub.php — InternalArgInfo return int (missing |bool) (#27684)
@@ -985,6 +987,11 @@ public static function stubParamTypeOverride(string $callableLc, int $index): ?s
                 3 => '?float',
                 default => null,
             },
+            // ext/standard/streamsfuncs.stub.php — untyped &$error_* outs (#28857)
+            'stream_socket_server' => match ($index) {
+                1, 2 => '',
+                default => null,
+            },
             // ext/standard/file.stub.php — ?int $length = null (#24826)
             'fgetcsv' => 1 === $index ? '?int' : null,
             // ext/standard/file.stub.php — string $eol = "\n" (missing from InternalArgInfo) (#25135)
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 86858364b3f..946288549b5 100755
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -111,6 +111,7 @@
             <file>./test/compliance/StreamIsattyReflectionVMTest.php</file>
             <file>./test/compliance/StreamSelectReflectionVMTest.php</file>
             <file>./test/compliance/StreamSocketClientReflectionVMTest.php</file>
+            <file>./test/compliance/StreamSocketServerReflectionVMTest.php</file>
             <file>./test/compliance/TriggerErrorUserErrorReflectionVMTest.php</file>
             <file>./test/compliance/TriggerErrorUserErrorHandledVMTest.php</file>
             <file>./test/compliance/TriggerErrorUserErrorHandledJITTest.php</file>
diff --git a/test/compliance/StreamSocketServerReflectionVMTest.php b/test/compliance/StreamSocketServerReflectionVMTest.php
new file mode 100644
index 00000000000..612a8d85789
--- /dev/null
+++ b/test/compliance/StreamSocketServerReflectionVMTest.php
@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PHPCompiler;
+
+require_once __DIR__.'/../BaseTest.php';
+
+/** VM compliance for stream_socket_server() Reflection stub types (#28857). */
+final class StreamSocketServerReflectionVMTest extends BaseTest
+{
+    protected static string $DIR = __DIR__;
+
+    public static function providePHPTests(): \Generator
+    {
+        $file = 'stream_socket_server_reflection_28857.phpt';
+        yield $file => self::parsePHPT(
+            __DIR__.'/cases/stdlib/'.$file,
+            $file
+        );
+    }
+
+    public function setUp(): void
+    {
+        $this->BIN = realpath(__DIR__.'/../../bin/vm.php');
+    }
+}
diff --git a/test/compliance/cases/stdlib/stream_socket_server_reflection_28857.phpt b/test/compliance/cases/stdlib/stream_socket_server_reflection_28857.phpt
new file mode 100644
index 00000000000..294c69aedb5
--- /dev/null
+++ b/test/compliance/cases/stdlib/stream_socket_server_reflection_28857.phpt
@@ -0,0 +1,23 @@
+--TEST--
+stdlib stream_socket_server Reflection untyped error outs + no return (#28857, streamsfuncs.stub.php)
+--FILE--
+<?php
+$r = new ReflectionFunction('stream_socket_server');
+foreach ($r->getParameters() as $p) {
+    echo $p->getName(), ':', $p->hasType() ? (string) $p->getType() : 'none', $p->isPassedByReference() ? '&' : '', $p->isOptional() ? '?' : '', PHP_EOL;
+}
+echo 'ret=', $r->hasReturnType() ? (string) $r->getReturnType() : 'none', PHP_EOL;
+// client sibling must stay Zend-aligned (#27848)
+$c = new ReflectionFunction('stream_socket_client');
+echo 'client_ret=', $c->hasReturnType() ? (string) $c->getReturnType() : 'none', PHP_EOL;
+echo 'client_ec=', $c->getParameters()[1]->hasType() ? (string) $c->getParameters()[1]->getType() : 'none', PHP_EOL;
+?>
+--EXPECT--
+address:string
+error_code:none&?
+error_message:none&?
+flags:int?
+context:none?
+ret=none
+client_ret=none
+client_ec=none
diff --git a/test/repro/issue_28857_stream_socket_server_reflection.php b/test/repro/issue_28857_stream_socket_server_reflection.php
new file mode 100644
index 00000000000..570653c8eb0
--- /dev/null
+++ b/test/repro/issue_28857_stream_socket_server_reflection.php
@@ -0,0 +1,7 @@
+<?php
+/** Issue #28857 — stream_socket_server Reflection: untyped error outs, no return (match Zend stubs). */
+$r = new ReflectionFunction('stream_socket_server');
+foreach ($r->getParameters() as $p) {
+    echo $p->getName(), ':', $p->hasType() ? (string) $p->getType() : 'none', $p->isPassedByReference() ? '&' : '', $p->isOptional() ? '?' : '', PHP_EOL;
+}
+echo 'ret=', $r->hasReturnType() ? (string) $r->getReturnType() : 'none', PHP_EOL;
diff --git a/test/unit/BuiltinParamNamesAliasTest.php b/test/unit/BuiltinParamNamesAliasTest.php
index b67b50208b2..d7c9d189de2 100644
--- a/test/unit/BuiltinParamNamesAliasTest.php
+++ b/test/unit/BuiltinParamNamesAliasTest.php
@@ -5375,6 +5375,18 @@ public function testStreamSocketClientStubReturnAndErrorOutTypes(): void
         self::assertNull(BuiltinInternalArgInfo::stubParamTypeOverride('stream_socket_client', 0));
     }
 
+    /** @covers issue #28857 */
+    public function testStreamSocketServerStubReturnAndErrorOutTypes(): void
+    {
+        self::assertNull(
+            BuiltinInternalArgInfo::returnTypeLabelForFunction('stream_socket_server')
+        );
+        self::assertSame('', BuiltinInternalArgInfo::stubParamTypeOverride('stream_socket_server', 1));
+        self::assertSame('', BuiltinInternalArgInfo::stubParamTypeOverride('stream_socket_server', 2));
+        self::assertNull(BuiltinInternalArgInfo::stubParamTypeOverride('stream_socket_server', 0));
+        self::assertNull(BuiltinInternalArgInfo::stubParamTypeOverride('stream_socket_server', 3));
+    }
+
     /** @covers issue #25845 */
     public function testHashHkdfStubReturnAndStreamContextSetOptionSignature(): void
     {