Bug #77828 [NEW]: SplFileObject::seek problems on custom stream wrappers

From: alexey dot khokhryakov at gmail dot com Operating system: PHP version: 7.2.16 Package: SPL related Bug Type: Bug Bug description:SplFileObject::seek problems on custom stream wrappers Description: ------------ SplFileObject::seek() works wrong for custom stream wrappers. It should work exactly the same as for native files. In my example I created simple stream wrapper which just proxies all calls to native fopen/fread/ftell/feof/fseek/stat functions which demonstrates the problem. Test script: --------------- <?php file_put_contents($tmpFilename = tempnam(sys_get_temp_dir(), 'test'), "one line\r\n"); stream_wrapper_register('foo', FooStreamWrapper::class); foreach ([$tmpFilename, "foo:/{$tmpFilename}"] as $filename) { $file = new SplFileObject($filename, 'r'); $file->seek($file->getSize()); var_dump($file->key()); } class FooStreamWrapper { private $r; public function stream_open($path, $mode) { $this->r = fopen(str_replace('foo:/', '', $path), $mode); return true; } public function stream_read($count) { return fread($this->r, $count); } public function stream_tell() { return ftell($this->r); } public function stream_eof() { return feof($this->r); } public function stream_seek($offset, $whence) { return fseek($this->r, $offset, $whence) === 0; } public function url_stat($path) { return stat(str_replace('foo:/', '', $path)); } } Expected result: ---------------- int(1) int(1) Actual result: -------------- int(1) int(0) -- Edit bug report at https://bugs.php.net/bug.php?id=77828&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=77828&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=77828&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=77828&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=77828&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=77828&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=77828&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=77828&r=needscript Try newer version: https://bugs.php.net/fix.php?id=77828&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=77828&r=support Expected behavior: https://bugs.php.net/fix.php?id=77828&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=77828&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=77828&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=77828&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77828&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=77828&r=dst IIS Stability: https://bugs.php.net/fix.php?id=77828&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=77828&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=77828&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=77828&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=77828&r=mysqlcfg