PHP ActiveX

Send a 16-bit Integer over a Socket

Demonstrates Socket.SendInt16, which sends the low 16 bits of a value as a two-byte integer in the selected byte order.

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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PHP ActiveX

<?php

$success = 0;

$socket = new COM("Chilkat.Socket");

//  Connect to the server using TLS.
$bTls = 1;
$maxWaitMs = 5000;
$success = $socket->Connect('example.com',5000,$bTls,$maxWaitMs);
if ($success == 0) {
    print $socket->LastErrorText . "\n";
    exit;
}

//  Send the low 16 bits of the value as a two-byte integer.  Use 1 for network byte order
//  (big-endian) or 0 for little-endian.
$bBigEndian = 1;
$success = $socket->SendInt16(1024,$bBigEndian);
if ($success == 0) {
    print $socket->LastErrorText . "\n";
    exit;
}

print '16-bit integer sent.' . "\n";

?>