eio_readlink
eio_readlink
(PECL eio >= 0.0.1dev)
eio_readlink — Read value of a symbolic link.
Description
resource eio_readlink ( string $path , int $pri , callable $callback [, string $data = NULL ] )
Parameters
path
Source symbolic link path
pri
The request priority: EIO_PRI_DEFAULT, EIO_PRI_MIN, EIO_PRI_MAX, or NULL. If NULL passed, pri internally is set to EIO_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
eio_readlink() returns request resource on success or FALSE on error.
Examples
Example #1 eio_readlink() 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(16) "/tmp/symlink.dat"
See Also
- eio_symlink
← eio_readdir
eio_realpath →
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Licensed under the Creative Commons Attribution License v3.0 or later.
