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eio_readlink

(PECL eio >= 0.0.1dev)

eio_readlink — Read value of a symbolic link

Açıklama

eio_readlink ( string $path , int $pri , callable $callback [, string $data = NULL ] ) : resource

Değiştirgeler

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.

Dönen Değerler

eio_readlink() returns request resource on success or FALSE on error.

Örnekler

Örnek 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();
?>

Yukarıdaki örnek şuna benzer bir çıktı üretir:

bool(true)
bool(true)
string(16) "/tmp/symlink.dat"

Ayrıca Bakınız

  • eio_symlink() - Create a symbolic link