Bug #77535 [NEW]: Invalid callback, h2 server push

From: tobias dot nyholm at gmail dot com Operating system: PHP version: master-Git-2019-01-28 (Git) Package: cURL related Bug Type: Bug Bug description:Invalid callback, h2 server push Description: ------------ When I set my callback in a different function I get a warning. I cannot figure out why. If I move the contents of addServerPushCallback() to sendRequest() then I wont have the same issue. Test script: --------------- <?php class MyHttpClient { private $mh; private $curl; public function sendRequest() { if (false === $this->mh = curl_multi_init()) { throw new \RuntimeException('Unable to create a new cURL multi handle'); } // FIXME Using a function like this does not work. If we inline the contents of addServerPushCallback(), then we got no problem $this->addServerPushCallback(); $this->curl = curl_init(); curl_setopt($this->curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS); curl_setopt($this->curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS); curl_setopt($this->curl, CURLOPT_HEADER, false); curl_setopt($this->curl, CURLOPT_RETURNTRANSFER, false); curl_setopt($this->curl, CURLOPT_FAILONERROR, false); curl_setopt($this->curl, CURLOPT_URL, 'https://http2.golang.org/serverpush'); curl_setopt($this->curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2_0); curl_setopt($this->curl, CURLOPT_HEADERFUNCTION, function ($ch, $data) { return \strlen($data); }); curl_setopt($this->curl, CURLOPT_WRITEFUNCTION, function ($ch, $data) { return \strlen($data); }); curl_multi_add_handle($this->mh, $this->curl); $stillRunning = null; while (true) { do { $mrc = curl_multi_exec($this->mh, $stillRunning); } while (CURLM_CALL_MULTI_PERFORM === $mrc); $info = curl_multi_info_read($this->mh); while (false !== $info && $info['msg'] == CURLMSG_DONE) { if (CURLMSG_DONE !== $info['msg']) { continue; } die("Start handle request. "); } } } private function addServerPushCallback(): void { $callback = static function () { return CURL_PUSH_OK; }; curl_multi_setopt($this->mh, CURLMOPT_PIPELINING, CURLPIPE_MULTIPLEX); curl_multi_setopt($this->mh, CURLMOPT_PUSHFUNCTION, $callback); } } $buzz = new MyHttpClient(); $buzz->sendRequest(); Expected result: ---------------- Output only "Start handle request." Actual result: -------------- Warning: Invalid callback , no array or string given in /usr/src/myapp/test.php on line 40 Warning: curl_multi_exec(): Cannot call the CURLMOPT_PUSHFUNCTION in /usr/src/myapp/test.php on line 40 -- Edit bug report at https://bugs.php.net/bug.php?id=77535&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=77535&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=77535&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=77535&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=77535&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=77535&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=77535&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=77535&r=needscript Try newer version: https://bugs.php.net/fix.php?id=77535&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=77535&r=support Expected behavior: https://bugs.php.net/fix.php?id=77535&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=77535&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=77535&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=77535&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77535&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=77535&r=dst IIS Stability: https://bugs.php.net/fix.php?id=77535&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=77535&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=77535&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=77535&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=77535&r=mysqlcfg