PHP

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.

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Chilkat2 PHP

<?php

use Chilkat2\Socket;

$socket = new Socket();

// Connect to the server using TLS.
$bTls = true;
$maxWaitMs = 5000;
try {
    $socket->Connect('example.com', 5000, $bTls, $maxWaitMs);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\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) {
    echo "No data is immediately available.\n";
} else {
    echo "Data is available to read.\n";
}