diff --git a/ext/standard/tests/http/gh8641.phpt b/ext/standard/tests/http/gh8641.phpt
new file mode 100644
index 0000000000000..9ccedc443dfec
--- /dev/null
+++ b/ext/standard/tests/http/gh8641.phpt
@@ -0,0 +1,34 @@
+--TEST--
+GH-8641 ([Stream] STREAM_NOTIFY_COMPLETED over HTTP never emitted)
+--SKIPIF--
+<?php require 'server.inc'; http_server_skipif(); ?>
+--INI--
+allow_url_fopen=1
+--FILE--
+<?php
+require 'server.inc';
+
+function stream_notification_callback($notification_code, $severity, $message, $message_code, $bytes_transferred, $bytes_max)
+{
+    if ($notification_code === STREAM_NOTIFY_COMPLETED) {
+        echo $notification_code, ' ', $bytes_transferred, ' ', $bytes_max, PHP_EOL;
+    }
+}
+
+$ctx = stream_context_create();
+stream_context_set_params($ctx, array("notification" => "stream_notification_callback"));
+
+$responses = array(
+    "data://text/plain,HTTP/1.0 200 Ok\r\nContent-Length: 11\r\n\r\nHello world",
+);
+
+['pid' => $pid, 'uri' => $uri] = http_server($responses, $output);
+
+$f = file_get_contents($uri, 0, $ctx);
+
+http_server_kill($pid);
+var_dump($f);
+?>
+--EXPECTF--
+8 11 11
+string(11) "Hello world"
diff --git a/main/streams/php_stream_context.h b/main/streams/php_stream_context.h
index c98f5420ac3e6..d4ebe29bc162e 100644
--- a/main/streams/php_stream_context.h
+++ b/main/streams/php_stream_context.h
@@ -94,6 +94,10 @@ END_EXTERN_C()
 	php_stream_notification_notify((context), PHP_STREAM_NOTIFY_PROGRESS, PHP_STREAM_NOTIFY_SEVERITY_INFO, \
 			NULL, 0, (bsofar), (bmax), NULL); } } while(0)
 
+#define php_stream_notify_completed(context) do { if ((context) && (context)->notifier) { \
+	php_stream_notification_notify((context), PHP_STREAM_NOTIFY_COMPLETED, PHP_STREAM_NOTIFY_SEVERITY_INFO, \
+			NULL, 0, (context)->notifier->progress, (context)->notifier->progress_max, NULL); } } while(0)
+
 #define php_stream_notify_progress_init(context, sofar, bmax) do { if ((context) && (context)->notifier) { \
 	(context)->notifier->progress = (sofar); \
 	(context)->notifier->progress_max = (bmax); \
diff --git a/main/streams/streams.c b/main/streams/streams.c
index f655faef10cbf..aa0e6f2952061 100644
--- a/main/streams/streams.c
+++ b/main/streams/streams.c
@@ -542,6 +542,9 @@ PHPAPI zend_result _php_stream_fill_read_buffer(php_stream *stream, size_t size)
 {
 	/* allocate/fill the buffer */
 
+	zend_result retval;
+	bool old_eof = stream->eof;
+
 	if (stream->readfilters.head) {
 		size_t to_read_now = MIN(size, stream->chunk_size);
 		char *chunk_buf;
@@ -562,7 +565,8 @@ PHPAPI zend_result _php_stream_fill_read_buffer(php_stream *stream, size_t size)
 			justread = stream->ops->read(stream, chunk_buf, stream->chunk_size);
 			if (justread < 0 && stream->writepos == stream->readpos) {
 				efree(chunk_buf);
-				return FAILURE;
+				retval = FAILURE;
+				goto out_check_eof;
 			} else if (justread > 0) {
 				bucket = php_stream_bucket_new(stream, chunk_buf, justread, 0, 0);
 
@@ -633,7 +637,8 @@ PHPAPI zend_result _php_stream_fill_read_buffer(php_stream *stream, size_t size)
 					 * further reads should fail. */
 					stream->eof = 1;
 					efree(chunk_buf);
-					return FAILURE;
+					retval = FAILURE;
+					goto out_is_eof;
 			}
 
 			if (justread <= 0) {
@@ -643,7 +648,6 @@ PHPAPI zend_result _php_stream_fill_read_buffer(php_stream *stream, size_t size)
 
 		efree(chunk_buf);
 		return SUCCESS;
-
 	} else {
 		/* is there enough data in the buffer ? */
 		if (stream->writepos - stream->readpos < (zend_off_t)size) {
@@ -670,12 +674,22 @@ PHPAPI zend_result _php_stream_fill_read_buffer(php_stream *stream, size_t size)
 					stream->readbuflen - stream->writepos
 					);
 			if (justread < 0) {
-				return FAILURE;
+				retval = FAILURE;
+				goto out_check_eof;
 			}
 			stream->writepos += justread;
+			retval = SUCCESS;
+			goto out_check_eof;
 		}
 		return SUCCESS;
 	}
+
+out_check_eof:
+	if (old_eof != stream->eof) {
+out_is_eof:
+		php_stream_notify_completed(PHP_STREAM_CONTEXT(stream));
+	}
+	return retval;
 }
 
 PHPAPI ssize_t _php_stream_read(php_stream *stream, char *buf, size_t size)
@@ -1124,6 +1138,7 @@ PHPAPI zend_string *php_stream_get_record(php_stream *stream, size_t maxlen, con
 static ssize_t _php_stream_write_buffer(php_stream *stream, const char *buf, size_t count)
 {
 	ssize_t didwrite = 0;
+	ssize_t retval;
 
 	/* if we have a seekable stream we need to ensure that data is written at the
 	 * current stream->position. This means invalidating the read buffer and then
@@ -1134,15 +1149,19 @@ static ssize_t _php_stream_write_buffer(php_stream *stream, const char *buf, siz
 		stream->ops->seek(stream, stream->position, SEEK_SET, &stream->position);
 	}
 
+	bool old_eof = stream->eof;
+
 	while (count > 0) {
 		ssize_t justwrote = stream->ops->write(stream, buf, count);
 		if (justwrote <= 0) {
 			/* If we already successfully wrote some bytes and a write error occurred
 			 * later, report the successfully written bytes. */
 			if (didwrite == 0) {
-				return justwrote;
+				retval = justwrote;
+				goto out;
 			}
-			return didwrite;
+			retval = didwrite;
+			goto out;
 		}
 
 		buf += justwrote;
@@ -1151,7 +1170,13 @@ static ssize_t _php_stream_write_buffer(php_stream *stream, const char *buf, siz
 		stream->position += justwrote;
 	}
 
-	return didwrite;
+	retval = didwrite;
+
+out:
+	if (old_eof != stream->eof) {
+		php_stream_notify_completed(PHP_STREAM_CONTEXT(stream));
+	}
+	return retval;
 }
 
 /* push some data through the write filter chain.