PHP Extension

Poll a Socket for Available Data

Demonstrates Socket.PollDataAvailable, which performs a nonblocking check for readable activity and returns whether data or another read-ready condition is present.

Background. This lets an application check for incoming data without blocking, for example in an event loop that services multiple tasks.

Chilkat PHP Extension Downloads

Download Chilkat for PHP Extension

PHP Extension

<?php

include("chilkat.php");

$success = false;

$socket = new CkSocket();

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

//  Perform a nonblocking check for readable data.  Returns true when data or another read-ready
//  condition is present, and false when nothing is immediately available.
$bAvailable = $socket->PollDataAvailable();
if ($bAvailable != true) {
    print 'No data is immediately available.' . "\n";
}
else {
    print 'Data is available to read.' . "\n";
}


?>