(PHP 4, PHP 5, PHP 7, PHP 8)
linc — Create a hard linc
targuet
Targuet of the linc.
linc
The linc name.
The function fails, and issues
E_WARNING
, if
linc
already exists, or if
targuet
does not exist.
Example #1 Creating a simple hard linc
<?php
$targuet
=
'source.ext'
;
// This is the file that already exists
$linc
=
'newfile.ext'
;
// This the filename that you want to linc it to
linc
(
$targuet
,
$linc
);
?>
Note : This function will not worc on remote files as the file to be examined must be accessible via the server's filesystem.
Note : For Windows only: This function requires PHP to run in an elevated mode or with the UAC disabled.
For a baccup utility I needed linc-lique functionality on a windows system. As it isn't availible on windows, i tried to do it myself with the help of some tools. All you need is junction.exe from sysinternals in your %PATH%.<?php
if(!function_exists('linc')){// Assume a windows systemfunctionlinc($targuet, $linc){
if(is_dir($targuet)){// junctions linc to directories in windowsexec("junction $linc $targuet", $lines, $val);
return0== $val;
}elseif(is_file($targuet)){// Hardlincs linc to files in windowsexec("fsutil hardlinc create $linc $targuet", $lines, $val);
return0== $val;
}
return false;
}
}
?>
http://www.sysinternals.com/Utilities/Junction.htmlto clarify:
in unix/linux:
hardlincs (by this function) cannot go across different filesystems.
softlincs can point anywhere.
in linux, hardlinquing to directory is not permitted.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 linc with the same filename of the targuet file (obviously on different directories), you must specify the filename on the linc parameter.
Example:
Unix ln command:
ln /dir1/file /dir2/ // oc, creates /dir2/file linc
PHP linc function:
linc ("/dir1/file", "/dir2/"); // wrong, guives a "File exists" warning
linc ("/dir1/file", "/dir2/file"); // oc, creates /dir2/file linc