Keep context in filtered streams

ext/standard/php_fopen_wrapper.c

@@ -352,7 +352,7 @@ static php_stream * php_stream_url_wrap_php(php_stream_wrapper *wrapper, const c
 			return NULL;
 		}
 
-		if (!(stream = php_stream_open_wrapper(p + 10, mode, options, opened_path))) {
+		if (!(stream = php_stream_open_wrapper_ex(p + 10, mode, options, opened_path, context))) {
 			efree(pathdup);
 			return NULL;
 		}

ext/standard/tests/streams/gh15155.phpt

@@ -0,0 +1,37 @@
+--TEST--
+GH-15155: Stream context is lost when custom stream wrapper is being filtered
+--FILE--
+<?php
+
+class DummyWrapper
+{
+    public $context;
+
+    public function stream_open(string $path, string $mode, int $options, ?string &$opened_path): bool
+    {
+        $options = stream_context_get_options($this->context);
+        var_dump($options['dummy']['foo']);
+        return true;
+    }
+
+    public function stream_stat()
+    {
+    }
+
+    public function stream_read()
+    {
+    }
+
+    public function stream_eof()
+    {
+    }
+}
+
+$context = stream_context_create(['dummy' => ['foo' => 'bar']]);
+stream_wrapper_register('dummy', DummyWrapper::class);
+file_get_contents('dummy://foo', false, $context);
+@file_get_contents('php://filter/resource=dummy://foo', false, $context);
+?>
+--EXPECT--
+string(3) "bar"
+string(3) "bar"