Bug #70943 [Com]: fopen() can't open a file if path is 259 characters long

Edit report at https://bugs.php.net/bug.php?id=70943&edit=1 ID: 70943 Comment by: nathanael at gnat dot ca Reported by: emanuele at fondani dot it Summary: fopen() can't open a file if path is 259 characters long Status: Open Type: Bug Package: Filesystem function related Operating System: Windows 10 PHP Version: 5.6.15 Block user comment: N Private report: N New Comment: I have the same problem on Windows Server 2008, php 5.6.16 Previous Comments: ------------------------------------------------------------------------ [2015-12-08 07:58:30] a dot ehrsam at hotmail dot com I think we have the following limitation of Windows: https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx#maxpath . This has been a discussion for .NET as well: https://github.com/dotnet/corefx/issues/645 ------------------------------------------------------------------------ [2015-12-08 06:52:45] yohgaki@php.net Note: Most file systems support up to 255 chars for file names. Path length are unlimited mostly. https://en.wikipedia.org/wiki/Comparison_of_file_systems ------------------------------------------------------------------------ [2015-11-30 07:06:45] adrian dot ehrsam at students dot fhnw dot ch This is an issue of composer as well: https://github.com/composer/composer/issues/4628 . It is the well-known Windows Long path Issue that can be fixed. ------------------------------------------------------------------------ [2015-11-19 18:01:09] emanuele at fondani dot it Description: ------------ fopen() function cannot access files whose path is more than 258 characters long. Test script: --------------- <?php // Generates a sample file whose path is exactly 259 characters long $testFile = __DIR__."\\".str_repeat("a", 254 - strlen(__DIR__)).".dat"; echo "Generating a file with a path length of ".strlen($testFile)." characters...\r\n"; touch($testFile); echo "Opening file... "; if ($fp = fopen($testFile, "r")) { fclose($fp); echo "OK"; } Expected result: ---------------- Generating a file with a path length of 259 characters... Opening file... OK Actual result: -------------- Generating a file with a path length of 259 characters... Opening file... Warning: fopen(S:\Emanuele\Temp\aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.dat): failed to open stream: Invalid argument in test.php on line 8 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=70943&edit=1