PHP ActiveX

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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PHP ActiveX

<?php

$success = 0;

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

//  Connect to the server using TLS.
$bTls = 1;
$maxWaitMs = 5000;
$success = $socket->Connect('example.com',5000,$bTls,$maxWaitMs);
if ($success == 0) {
    print $socket->LastErrorText . "\n";
    exit;
}

//  Perform a nonblocking check for readable data.  Returns 1 when data or another read-ready
//  condition is present, and 0 when nothing is immediately available.
$bAvailable = $socket->PollDataAvailable();
if ($bAvailable != 1) {
    print 'No data is immediately available.' . "\n";
}
else {
    print 'Data is available to read.' . "\n";
}


?>