PHP

TCP Socket Send Byte and Receive Byte

Demonstrates the Chilkat Socket ReceiveByte and SendByte method. Chilkat2 PHP

<?php

use Chilkat2\Socket;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$sock = new Socket();

// --------------------------------------------------------------------
// This example uses the public TCP echo service at https://tcpbin.com/
// --------------------------------------------------------------------

$useTls = false;
$port = 4242;
$maxWaitMs = 5000;
try {
    $sock->Connect('tcpbin.com', $port, $useTls, $maxWaitMs);

    // Wait a max of 2 seconds for a response..
    $sock->MaxReadIdleMs = 2000;

    // Send a byte.
    $sock->SendByte(96);

    // The tcpbin.com echo server only echoes after receiving an LF (linefeed char)
    $sock->SendByte(10);

    // The echo server will echo back whatever is sent to it.
    // We should be able to read the same byte back..
    // After successfully reading, the byte value is available in the ReceivedInt property.
    $treatAsUnsignedInt = true;
    $sock->ReceiveByte($treatAsUnsignedInt);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

// Let's look at the value of the byte received.  It should be 96.
echo $sock->ReceivedInt, "\n";

// The echo server also echoed the LF back.
$sock->ReceiveByte($treatAsUnsignedInt);
// Assuming success..

// Should be decimal 10.
echo $sock->ReceivedInt, "\n";