CODEWITHSUNDEEP
phpescapingexec
albanx
albanx

Reputation: 6335

php exec: bad php backslash escaping or what?

I have this command:

exec(sprintf('%s %s dump_data output', escapeshellarg($apps . 'pdftk' . DIRECTORY_SEPARATOR . 'pdftk.exe'), escapeshellarg(self::winEscapeShellArgFix($file, array()))), $output);

the result of sprintf is this:

"\\127.0.0.1\binary\win32\pdftk\pdftk.exe" "//127.0.0.1/uploads\1-16knje01g1drjagii61j3515a94.pdf" dump_data output

running this command from exec will give no result, but if I run it from windows cmd it will work correctly. After I trying millions of commands I understand that the problem is that php is using as escape backslash the backslashes inside the sprintf output:

**\\**127......

Any one knows why this happens? I have all magic OFF.

EDIT: if i will execute:

exec("\\127.0.0.1\binary\win32\pdftk\pdftk.exe //127.0.0.1/uploads\1-16knje01g1drjagii61j3515a94.pdf dump_data output",$outarr);

or

exec('\\127.0.0.1\binary\win32\pdftk\pdftk.exe //127.0.0.1/uploads\1-16knje01g1drjagii61j3515a94.pdf dump_data output',$outarr);

it will not work

EDIT2: I debug and it is not an escaping problem the command actually is good, IT seems to be a exec problem, that is not returning the output. it works in a iis web server but doesnt work in another iis webserver.

Upvotes: 2

Views: 2247

Answers (1)

AlexC
AlexC

Reputation: 1141

albanx, it's not sprintf doing it to you, its the escapeshellarg which is adding the backslashes. http://php.net/manual/en/function.escapeshellarg.php

Upvotes: 2

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