`gzopen()` does not use the default stream context when opening HTTP URLs

[TimWolla]

Description

The following code:

<?php
stream_context_set_default([
	'http' => array(
		'user_agent' => 'dummy',
	)
]);

$f = fopen("http://example.com", 'r');
var_dump(stream_get_contents($f));

$f = gzopen("http://example.com", 'r');
var_dump(stream_get_contents($f));

Resulted in these HTTP requests being sent:

sendto(4, "GET / HTTP/1.1\r\nHost: example.com\r\nConnection: close\r\nUser-Agent: dummy\r\n\r\n", 75, MSG_DONTWAIT, NULL, 0) = 75
[…]
sendto(5, "GET / HTTP/1.1\r\nHost: example.com\r\nConnection: close\r\n\r\n", 56, MSG_DONTWAIT, NULL, 0) = 56

But I expected these HTTP requests to be sent:

sendto(4, "GET / HTTP/1.1\r\nHost: example.com\r\nConnection: close\r\nUser-Agent: dummy\r\n\r\n", 75, MSG_DONTWAIT, NULL, 0) = 75
[…]
sendto(5, "GET / HTTP/1.1\r\nHost: example.com\r\nConnection: close\r\nUser-Agent: dummy\r\n\r\n", 75, MSG_DONTWAIT, NULL, 0) = 75

The user-agent is missing from the gzopen() call.

PHP Version

PHP 8.3.13

Operating System

Ubuntu 24.04

[nielsdos]

Right, this makes sense to me. It's a behaviour change though so not sure if it can go in stable branches.
Perhaps an optional context argument like fopen has is also a good idea?

Anyway, fixing the report as-is is not hard at all:

diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index df3d270217d..d4905b920e5 100644
--- a/ext/zlib/zlib.c
+++ b/ext/zlib/zlib.c
@@ -28,6 +28,7 @@
 #include "ext/standard/info.h"
 #include "php_zlib.h"
 #include "zlib_arginfo.h"
+#include "ext/standard/file.h"
 
 /*
  * zlib include files can define the following preprocessor defines which rename
@@ -659,7 +660,7 @@ PHP_FUNCTION(gzopen)
 		flags |= USE_PATH;
 	}
 
-	stream = php_stream_gzopen(NULL, filename, mode, flags, NULL, NULL STREAMS_CC);
+	stream = php_stream_gzopen(NULL, filename, mode, flags, NULL, php_stream_context_from_zval(NULL, false) STREAMS_CC);
 
 	if (!stream) {
 		RETURN_FALSE;