PHP

Receive a 16-bit Integer from a Socket

Demonstrates Socket.ReceiveInt16, which reads exactly two bytes as a 16-bit integer and stores the result in the ReceivedInt property. Byte order and signedness are selectable.

Background. Fixed-size integers and length prefixes are common building blocks for application-defined binary protocols. Byte order is selectable, with big-endian being network byte order.

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Chilkat2 PHP

<?php

use Chilkat2\Socket;

$socket = new Socket();

// Connect to the server using TLS.
$bTls = true;
$maxWaitMs = 5000;
try {
    $socket->Connect('example.com', 5000, $bTls, $maxWaitMs);

    // Read exactly two bytes as a 16-bit integer and store the result in the ReceivedInt property.
    // The 1st argument selects byte order (true = big-endian); the 2nd selects unsigned interpretation.
    $bBigEndian = true;
    $bUnsigned = false;
    $socket->ReceiveInt16($bBigEndian, $bUnsigned);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo 'Received 16-bit integer: ', $socket->ReceivedInt, "\n";