lchown
>> Be aware that the filesystem of the target and the link must be the same,
>> otherwise the link will fail! (Linking files over different filesystems doesn't work under Unix).
Using debian sid, 2.6.24-17-generic, that is definitely not true.
link
(PHP 4, PHP 5)
link — Create a hard link
Description
bool link
( string $target
, string $link
)
link() creates a hard link.
Parameters
- target
-
Target of the link.
- link
-
The link name.
Return Values
Returns TRUE on success or FALSE on failure.
Notes
Note: This function will not work on remote files as the file to be examined must be accessible via the server's filesystem.
Note: This function is not implemented on Windows platforms.
add a note
User Contributed Noteslink
albertpeschar at gmail dot com
28-May-2008 05:20
28-May-2008 05:20
Tim McCormack
28-Mar-2008 02:04
28-Mar-2008 02:04
As others have noted, the parameter order can seem a little awkward. Here's a mnemonic for remembering the order:
In UNIX, commands go like this:
> command input output
The link command is no different:
> ln infile outfile
...and PHP respects that convention.
Jasper Bekkers
06-Mar-2008 06:08
06-Mar-2008 06:08
Due to the acquisition of Winternals by Microsoft, the previous link to junction.exe doesn't work anymore. The file has been moved to http://www.microsoft.com/technet/
sysinternals/FileAndDisk/Junction.mspx
(without the newline)
me at robhaswell dot co dot uk
10-Jan-2008 03:56
10-Jan-2008 03:56
For those that find the order of the arguments unclear, here is a more verbose description:
<?php
$source = "something.ext"; // This is the file that already exists
$dest = "newfile.ext"; // This the filename that you want to link it to
link($source, $dest);
?>
stephane AT baladeauboutdumonde DOT com
06-Aug-2007 08:45
06-Aug-2007 08:45
Make link recursively :
<?php
function makeRecusLink($orig, $dest)
{
if (is_dir($orig)) {
if (substr($orig, -1) != '/') {
$orig .= '/';
}
$handle = opendir($orig);
while (false !== ($file = readdir($handle))) {
if ($file != '.' && $file != '..') {
$path = $orig.$file;
if (is_file($path)) {
@link($path, $dest.'/'.$file);
} else if (is_dir($path)) {
@mkdir($dest.'/'.$file, 0755);
makeRecusLink($path, $dest.'/'.$file);
}
}
}
}
closedir($handle);
}
?>
root at c-works dot net
05-Jan-2007 10:58
05-Jan-2007 10:58
Be aware that the filesystem of the target and the link must be the same, otherwise the link will fail! (Linking files over different filesystems doesn't work under Unix).
Jasper Bekkers
02-Aug-2006 04:16
02-Aug-2006 04:16
For a backup utility I needed link-like functionality on a windows system. As it isn't availible on windows, i tried to do it myself with the help of some tools. All you need is junction.exe from sysinternals in your %PATH%.
<?php
if(!function_exists('link')){ // Assume a windows system
function link($target, $link){
if(is_dir($target)){
// junctions link to directories in windows
exec("junction $link $target", $lines, $val);
return 0 == $val;
}elseif(is_file($target)){
// Hardlinks link to files in windows
exec("fsutil hardlink create $link $target", $lines, $val);
return 0 == $val;
}
return false;
}
}
?>
http://www.sysinternals.com/Utilities/Junction.html
Guilherme Garnier
25-Apr-2006 08:32
25-Apr-2006 08:32
I noticed that, differently from Unix ln command, the second parameter can´t be a directory name, i.e., if you want to create a link with the same filename of the target file (obviously on different directories), you must specify the filename on the link parameter.
Example:
Unix ln command:
ln /dir1/file /dir2/ // ok, creates /dir2/file link
PHP link function:
link ("/dir1/file", "/dir2/"); // wrong, gives a "File exists" warning
link ("/dir1/file", "/dir2/file"); // ok, creates /dir2/file link
mmap at upt dot org
15-May-2004 01:28
15-May-2004 01:28
I think kop is confused regarding the semantics of link's argument order. The user's comment states that target should not already exist, suggesting that it is the target that is being created. As with the UNIX hardlink, ln(1), the target is the existing file. I think kop meant to say php's link() will return an error if the second parameter, the link being created, already exists.
Also, as with the UNIX system call link will fail if the link being created exists on a different filesystem.
kop at meme dot com
25-Sep-2003 11:20
25-Sep-2003 11:20
Note that link() will not work if the target already exists, at least as of php 4.1.2.