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User Contributed Notes 4 notes

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2
Anonymous
4 years ago
to clarify:

in unix/linux:
hardlinks (by this function) cannot go across different filesystems.
softlinks can point anywhere.

in linux, hardlinking to directory is not permited.
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2
stephane AT baladeauboutdumonde DOT com
6 years ago
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);
}
?>
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1
Guilherme Garnier
8 years ago
I noticed that, differently from Unix ln command, the second parameter canĀ“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
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0
Jasper Bekkers
7 years ago
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
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