php_unix_domain_socket_abstract_client.php

<?php
$timeout = 2000;

$socket = stream_socket_client(
    "unix://\0testtest",
    $errorCode,
    $errorMessage,
    $timeout,
);

if (!$socket) {
    var_dump($errorCode);
    var_dump($errorMessage);
} else {
    fwrite($socket, "CLIENT MESSAGE\n");
    while (!feof($socket)) {
        echo "@send";
        echo fgets($socket, 1024);
    }
    fclose($socket);
}