Is there a way to toggle the “Hidden” or “Read-Only” switches on a Windows file using PHP?

问题

UPDATED

As the title says, is there a way to toggle the "Hidden" or "Read-Only" switch on Windows using PHP?

I'd like to do this without opening a shell exec() if possible.

回答1:

A file can't be hidden, it's always in the file system. There's the *NIX convention that files starting with a . are not shown by default for certain operations (like the ls command), but only if you don't look hard enough. The same goes for Windows, but Windows handles it with file meta attributes.

What you can/should do is use file permissions to make the folder/file inaccessible to anybody who has no business accessing it. Use chmod, chown and chgrp to do so from PHP. You may have to learn a bit about proper file system permissions though.

回答2:

To make a file "hidden" on Windows you can use

attrib +h yourfile.ext

To make a file "read-only" on Windows you can use

attrib +r yourfile.ext

To use these commands from PHP you just execute them using system or exec.

Also see : Attrib

回答3:

On Linux/Unix you can make the file hidden by putting a dot (.) at the start of its name, and use the chmod function to make the file read-only. Not sure about Windows.

回答4:

While there are some reports on the web that PHP's chmod would indeed be able to set Windows attribute flags (at least the read-only flag) I could not reproduce this at all.
So shelling out to an attrib command is the way to go.

READ-ONLY on Windows and *nix

Here is some code to set a file to read-only that will work on Windows and *nix:

// set file READ-ONLY (Windows & *nix)
$file = 'path/to/file.ext';
if(isset($_SERVER['WINDIR'])) {
    // Host OS is Windows
    $file = str_replace('/', '\\', $file);
    unset($res);
    exec('attrib +R ' . escapeshellarg($file), $res);
    $res = $res[0];
}else{
    // Host OS is *nix
    $res = chmod($file, 0444);
}
//$res contains result string of operation

Hints:
Replacing '/' with '\' is important as the shell command (attrib) is not as tolerant to slashes as PHP is.
$res is unset in the Windows part because exec() appends to any existing value.

HIDDEN on Windows

If you want to set a file hidden, this would probably be a Windows only task:

// set file HIDDEN (Windows only)
$file = 'path/to/file.ext';
$file = str_replace('/', '\\', $file);
unset($res);
exec('attrib +H ' . escapeshellarg($file), $res);
$res = $res[0];
//$res contains result string of operation

回答5:

For the file permissions, try chmod function:

<?php 
    chmod("/somedir/somefile", 0755);  // octal; correct value of mode
?>

More here: http://php.net/manual/en/function.chmod.php

来源：https://stackoverflow.com/questions/4322215/is-there-a-way-to-toggle-the-hidden-or-read-only-switches-on-a-windows-file

标签

php

file

hidden

readonly