PHP ActiveX

Receive a Single Byte from a Socket

Demonstrates Socket.ReceiveByte, which reads exactly one byte and stores its numeric value in the ReceivedInt property. The argument selects signed or unsigned interpretation.

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;
}

//  Read exactly one byte.  Its numeric value is stored in the ReceivedInt property.  Passing 1
//  interprets the byte as unsigned (0 through 255); 0 interprets it as signed.
$bUnsigned = 1;
$success = $socket->ReceiveByte($bUnsigned);
if ($success == 0) {
    print $socket->LastErrorText . "\n";
    exit;
}

print 'Received byte value: ' . $socket->ReceivedInt . "\n";

?>