Bug #16830 Updated: file_exists("") returns TRUE instead of FALSE

ID: 16830 Updated by: sniper@php.net Reported By: soeren.fleischer@gmx.net -Status: Open +Status: Feedback Bug Type: Filesystem function related Operating System: Windows 2000 SP2 PHP Version: 4.2.0 New Comment: Just in case..are you absolutely sure you have updated all dlls related to PHP in your system? (I assume you had some older PHP there before) e.g. php4ts.dll is quite important to be new. Try searching your filesystem for it. You might have many of them there. --Jani Previous Comments: ------------------------------------------------------------------------ [2002-04-26 12:47:20] soeren.fleischer@gmx.net Sander, please tell me the Bug ID for it. I did search the Bugs DB for open bugs with "file_exists". The bug I'm talking about was reported as bug for PHP 4.1.0 ( Bug ID: 15218 ) and it has actually been fixed in 4.1.2, but now it appeared again in PHP 4.2.0 !! So this is no duplicate bugreport, I think. ------------------------------------------------------------------------ [2002-04-26 11:59:39] sander@php.net Plese, SEARCH the bugdb. There is a report about this. (sorry Jani ;) ------------------------------------------------------------------------ [2002-04-25 16:39:58] soeren.fleischer@gmx.net file_exists("") returns TRUE instead of FALSE As per request, here are more details... This: <? $filename=""; if (is_file($filename)) { print "is_file sais, the file $filename <b>does exist</b>.<br>"; } else { print "is_file sais, the file $filename <b>did not exist</b>.<br>"; } if (file_exists($filename)) { print "file_exists sais, the file $filename <b>does exist</b>.<br>"; } else { print "file_exists sais, the file $filename <b>did not exist</b>.<br>"; } ?> will return: is_file sais, the file did not exist. file_exists sais, the file does exist. Again, in other words: If you give file_exists() an empty string as argument ( file_exists("") ), it will return TRUE (saying the file existed, but it does not, because "" is no file.) is_file() correctly returns FALSE if you give it an empty string as argument and so should file_exists do, as it did in PHP 4.1.2 Further information: I used to check my upload-scripts for uploaded files using $file=$_FILES['datei']['tmp_name']; if (file_exists($file)) { savefile($file); } but I cannot use this anymore because when a user does not upload a file, $filename becomes an empty string and file_exists returns TRUE, so my function savefile($file) wants to save a non-uploaded file. ------------------------------------------------------------------------ [2002-04-25 16:14:54] tal@php.net Not enough information was provided for us to be able to handle this bug. Please re-read the instructions at http://bugs.php.net/how-to-report.php If you can provide more information, feel free to add it to this bug and change the status back to "Open". ------------------------------------------------------------------------ [2002-04-25 15:57:50] soeren.fleischer@gmx.net file_exists("") returns TRUE instead of FALSE. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=16830&edit=1