Bug #74090 [NEW]: stream_get_contents maxlength>-1 returns empty string on windows

From: me at micksam7 dot com Operating system: Windows 10 v1607 PHP version: 7.1.1 Package: Streams related Bug Type: Bug Bug description:stream_get_contents maxlength>-1 returns empty string on windows Description: ------------ stream_get_contents() with any maxlength greater than -1 returns an empty string, This only appears to occur with UDP streams opened via stream_socket_client(), specifically on Windows 10. This problem doesn't occur on Linux and may function fine on older versions of Windows. The problem appears to reside somewhere in the php_stream_eof call within _php_stream_copy_to_mem - php_stream_eof seems to always return true on UDP streams on Windows 10 systems. More digging required. Test script: --------------- //Submit DNS Request $data = base64_decode("1oIBAAABAAAAAAAAB2V4YW1wbGUDb3JnAAABAAE="); $fd = stream_socket_client("udp://8.8.8.8:53", $errno, $errstr, 0, STREAM_CLIENT_CONNECT | STREAM_CLIENT_ASYNC_CONNECT); stream_set_blocking($fd, 0); stream_socket_sendto($fd,$data); sleep(1); var_dump(stream_get_contents($fd,65565)); //Does not work var_dump(stream_get_contents($fd)); //No maxlength, works fine stream_socket_shutdown($fd,STREAM_SHUT_RDWR); Expected result: ---------------- Returns a valid DNS response roughly 45 bytes long, then an empty string. string(45) "<>" string(0) "" Actual result: -------------- Returns an empty string, then a valid DNS response. string(0) "" string(45) "<>" -- Edit bug report at https://bugs.php.net/bug.php?id=74090&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=74090&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=74090&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=74090&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=74090&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=74090&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=74090&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=74090&r=needscript Try newer version: https://bugs.php.net/fix.php?id=74090&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=74090&r=support Expected behavior: https://bugs.php.net/fix.php?id=74090&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=74090&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=74090&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=74090&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=74090&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=74090&r=dst IIS Stability: https://bugs.php.net/fix.php?id=74090&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=74090&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=74090&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=74090&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=74090&r=mysqlcfg