PHP ActiveX

Socket Receive String Until Specific Byte Value is Received

Demonstrates the Chilkat Socket ReceiveStringUntilByte method. PHP ActiveX

<?php

$success = 0;

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

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

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

$useTls = 0;
$port = 4242;
$maxWaitMs = 5000;
$success = $sock->Connect('tcpbin.com',$port,$useTls,$maxWaitMs);
if ($success == 0) {
    print $sock->LastErrorText . "\n";
    exit;
}

// 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);
if ($sock->LastMethodSuccess == 0) {
    print $sock->LastErrorText . "\n";
    exit;
}

print $s1 . "\n";

$s2 = $sock->receiveStringUntilByte($lookForByte);
if ($sock->LastMethodSuccess == 0) {
    print $sock->LastErrorText . "\n";
    exit;
}

print $s2 . "\n";

// The echo server will also echo back the final LF
$sock->ReceiveByte(1);
$maxWaitMs = 100;
$sock->Close(100);

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

?>