Php/docs/function.eio-link
eio_link
(PECL eio >= 0.0.1dev)
eio_link — Create a hardlink for file
Description
eio_link
( string $path
, string $new_path
[, int $pri
= EIO_PRI_DEFAULT
[, callable $callback
= NULL
[, mixed $data
= NULL
]]] ) : resource
eio_link() creates a hardlink
new_path
for a file specified by
path
.
Parameters
path
Source file path.
new_path
Target file path.
pri
The request priority:
EIO_PRI_DEFAULT
,EIO_PRI_MIN
,EIO_PRI_MAX
, orNULL
. IfNULL
passed,pri
internally is set toEIO_PRI_DEFAULT
.callback
callback
function is called when the request is done. It should match the following prototype:void callback(mixed $data, int $result[, resource $req]);
data
is custom data passed to the request.
result
request-specific result value; basically, the value returned by corresponding system call.
req
is optional request resource which can be used with functions like eio_get_last_error()
data
Arbitrary variable passed to
callback
.
Return Values
Examples
Example #1 eio_link() example
<?php$filename = dirname(__FILE__)."/symlink.dat";touch($filename);$link = dirname(__FILE__)."/symlink.link";$hardlink = dirname(__FILE__)."/hardlink.link";function my_hardlink_cb($data, $result) { global $link, $filename; var_dump(file_exists($data) && !is_link($data)); @unlink($data); eio_symlink($filename, $link, EIO_PRI_DEFAULT, "my_symlink_cb", $link);}function my_symlink_cb($data, $result) { global $link, $filename; var_dump(file_exists($data) && is_link($data)); if (!eio_readlink($data, EIO_PRI_DEFAULT, "my_readlink_cb", NULL)) { @unlink($link); @unlink($filename); }}function my_readlink_cb($data, $result) { global $filename, $link; var_dump($result); @unlink($link); @unlink($filename);}eio_link($filename, $hardlink, EIO_PRI_DEFAULT, "my_hardlink_cb", $hardlink);eio_event_loop();?>
The above example will output something similar to:
bool(true) bool(true) string(%d) "%ssymlink.dat"