PHP

Socket Receive String Until Specific Byte Value is Received

Demonstrates the Chilkat Socket ReceiveStringUntilByte 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 some strings, each terminated by a 0 byte.
    $sock->SendString('This is the 1st string');
    $sock->SendByte(0);
    $sock->SendString('This is string number 2');
    $sock->SendByte(0);

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

    // Now let's receive what is echoed back....
    // Receive each string and the NULL byte.
    // The call to ReceiveStringUntilByte will receive incoming data until the lookForByte is encountered.
    // The lookForByte is receive and discarded (it is not returned in the string)
    $lookForByte = 0;
    $s1 = $sock->ReceiveStringUntilByte($lookForByte);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo $s1, "\n";

try {
    $s2 = $sock->ReceiveStringUntilByte($lookForByte);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo $s2, "\n";

// The echo server will also echo back the final LF
$sock->ReceiveByte(true);
$maxWaitMs = 100;
$sock->Close(100);

// Output:
// This is the 1st string
// This is string number 2