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
Descrierea
bool link
( string $target
, string $link
)
link() creates a hard link.
Parametri
- target
-
Target of the link.
- link
-
The link name.
Valorile întroarse
Întoarce valoarea TRUE în cazul succesului sau FALSE în cazul eşecului.
Note
Notă: Această funcţie nu va lucra cu fişiere la distanţă, deoarece fişierul care trebuie să fie examinat trebuie să fie accesibil prin intermediul sistemului de fişiere al serverului.
Notă: Această funcţie nu este implementată pe platformele Windows.
add a note
User Contributed Noteslink
albertpeschar at gmail dot com
28-May-2008 11:20
28-May-2008 11:20
Tim McCormack
28-Mar-2008 09:04
28-Mar-2008 09:04
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
07-Mar-2008 01:08
07-Mar-2008 01:08
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 10:56
10-Jan-2008 10:56
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, $dest);
?>
stephane AT baladeauboutdumonde DOT com
07-Aug-2007 02:45
07-Aug-2007 02:45
Make link recursively :
<?php
function makeRecusLink($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($handle);
}
?>
root at c-works dot net
05-Jan-2007 05:58
05-Jan-2007 05:58
Be aware that the filesystem of the target and the link must be the same, otherwise the link will fail! (Linking files over different filesystems doesn't work under Unix).
Jasper Bekkers
02-Aug-2006 10:16
02-Aug-2006 10:16
For a backup utility I needed link-like functionality on a windows system. As it isn't availible on windows, i tried to do it myself with the help of some tools. All you need is junction.exe from sysinternals in your %PATH%.
<?php
if(!function_exists('link')){ // Assume a windows system
function link($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
26-Apr-2006 02:32
26-Apr-2006 02:32
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 07:28
15-May-2004 07:28
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 05:20
25-Sep-2003 05:20
Note that link() will not work if the target already exists, at least as of php 4.1.2.