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"

Description

Parameters

Return Values

Examples

See Also