Bug #75894 [NEW]: php_stream_input_seek() broken

From: davide dot romanini at gmail dot com Operating system: PHP version: 7.1.14RC1 Package: Streams related Bug Type: Bug Bug description:php_stream_input_seek() broken Description: ------------ The php://input stream behaves differently from other standard streams. In particular, seeking is completely broken. Basically the stream works only when used forward-only, consume-once (eg: file_get_contents('php://input')). I didn't found the bug reported here (I searched under streams related bugs using the 'seek' keyword). I sketched a possible fix with tests here: https://github.com/php/php-src/compare/PHP-7.1...davide-romanini:fix-php-stream-input-seek Test script: --------------- --POST-- Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum ante ex, placerat nec sollicitudin vitae, ultricies molestie nisi. Maecenas lacus magna, augue. --FILE-- <?php $i = fopen('php://input', 'r'); fseek($i, 5); var_dump(fread($i, 10)); rewind($i); var_dump(fread($i, 5)); fseek($i, -6, SEEK_END); var_dump(fread($i, 6)); ?> --EXPECT-- string(10) " ipsum dol" string(5) "Lorem" string(6) "augue." -- Edit bug report at https://bugs.php.net/bug.php?id=75894&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=75894&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=75894&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=75894&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=75894&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=75894&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=75894&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=75894&r=needscript Try newer version: https://bugs.php.net/fix.php?id=75894&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=75894&r=support Expected behavior: https://bugs.php.net/fix.php?id=75894&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=75894&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=75894&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=75894&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=75894&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=75894&r=dst IIS Stability: https://bugs.php.net/fix.php?id=75894&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=75894&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=75894&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=75894&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=75894&r=mysqlcfg