Bug->Doc #64811 [Opn->Ver]: SplTempFileObject doesn't provide valid return values for SplFileInfo / filenam

Edit report at https://bugs.php.net/bug.php?id=64811&edit=1 ID: 64811 Updated by: cmb@php.net Reported by: bugs+php at childno dot de Summary: SplTempFileObject doesn't provide valid return values for SplFileInfo / filenam -Status: Open +Status: Verified -Type: Bug +Type: Documentation Problem Package: SPL related Operating System: Any PHP Version: 5.4.15 Block user comment: N Private report: N New Comment: On having a closer look, the behavior is unlikely to be intentional. SplTempFileObject::getFileName() returns the name of the php:// wrapper, and ::getRealPath() returns false, because realpath(php://temp) returns false; ::getPath(), however, returns an empty string. Still, changing this would be a BC break per se, but worse, the change would need to be quite intrusive, since php://temp's writing to temp is hidden in the stream wrapper and the actual path to the temp file is ignored[1]. Given that the implementation behaves this way since "forever"[2], we need to document that behavior anyway. Thus, changing to doc problem. Could switch back to bug or feature request, after the docs have been fixed. I'm not sure how to fix the docs, though, since none of these methods are actually overloaded, nor are there properties to document. [1] <https://github.com/php/php-src/blob/php-7.4.22/main/streams/memory.c#L384> [2] <https://3v4l.org/sX6CK> Previous Comments: ------------------------------------------------------------------------ [2018-08-18 14:39:53] cmb@php.net SplTempFileObject is implemented as simple wrapper over php://temp and php://memory, respectively,[1] and as such it's not possible to get the actual filename AFAIK. This is why ::getRealPath() returns FALSE (it's not an empty string). [1] <https://github.com/php/php-src/blob/php-7.3.0beta2/ext/spl/spl_directory.c#L2314-L2323> ------------------------------------------------------------------------ [2014-03-13 14:39:41] hudsonHatesSpam at gmail dot com In my use case, I'm trying to build a temp file for a MySQL "LOAD DATA LOCAL INFILE". I do not want the file to persist after the script has run, and there's no clear way to remove an SplFileObject at the end of the script. My recourse was to use SplTempFileObject calling: $tempFile = new \SplTempFileObject(0); According to the documentation: "public SplTempFileObject::__construct ([ int $max_memory ] )" and "If max_memory is zero, no memory will be used" which forces the tempFile to be written to disk. While I can see my temp file during script execution, I have no way of feeding the file URI to my SQL call. ------------------------------------------------------------------------ [2013-05-10 11:20:50] bugs+php at childno dot de Description: ------------ the SplTempFileObject is intended to use the php://temp in-memory storage. This has disadvantages if it is used for creating files on the fly that needed to be processed afterwards. Typically you want to provide SplFileInfo to certain interfaces that might handle and read the content again. e.g. see http://stackoverflow.com/questions/12555139 Test script: --------------- $file = new \SplTempFileObject(); if ($file->fwrite("foo") !== null) print('wrote ' . $file->ftell() . ' byte(s) to ' . $file->getRealPath() . ''); // wrote 3 byte(s) to `` // ^^ thats ok for < 2MB while it is expected to be in-memory $file = new \SplTempFileObject(0); if ($file->fwrite("foo") !== null) print('wrote ' . $file->ftell() . ' byte(s) to ' . $file->getRealPath() . ''); // wrote 3 byte(s) to `` // NOT OK Because we set the limit to 0 to force writing stuff to the filesystem $file = new \SplFileObject(tempnam(sys_get_temp_dir(), rand()), 'w+'); if ($file->fwrite("bar") !== null) print('wrote ' . $file->ftell() . ' byte(s) to ' . $file->getRealPath() . ''); // wrote 3 byte(s) to /tmp/2123740490ZwI6Qd // ^^ that's what I expect even for \SplTempFileObject(0) Expected result: ---------------- \SplTempFileObject->getFileName() should return s.th. like 2123740490ZwI6Qd \SplTempFileObject->getFileInfo() should return a valid SplFileInfo Object pointing to /tmp/2123740490ZwI6Qd \SplTempFileObject->getRealPath() should return s.th. like /tmp/2123740490ZwI6Qd Actual result: -------------- \SplTempFileObject->getFileName() will return php://temp \SplTempFileObject->getFileInfo() will return an empty object / file pointer \SplTempFileObject->getRealPath() will always return an empty string! ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=64811&edit=1