1.2.1496. ext/event

Extension event.

This is an extension to efficiently schedule I/O, time and signal based events using the best I/O notification mechanism available for specific platform. This is a port of libevent to the PHP infrastructure.

<?php
// Read callback
function readcb($bev, $base) {
    //$input = $bev->input; //$bev->getInput();

    //$pos = $input->search('TTP');
    $pos = $bev->input->search('TTP');

    while (($n = $bev->input->remove($buf, 1024)) > 0) {
        echo $buf;
    }
}

// Event callback
function eventcb($bev, $events, $base) {
    if ($events & EventBufferEvent::CONNECTED) {
        echo 'Connected.';
    } elseif ($events & (EventBufferEvent::ERROR | EventBufferEvent::EOF)) {
        if ($events & EventBufferEvent::ERROR) {
            echo 'DNS error: ', $bev->getDnsErrorString(), PHP_EOL;
        }

        echo 'Closing'.PHP_EOL;
        $base->exit();
        exit('Done'.PHP_EOL);
    }
}

if ($argc != 3) {
    echo <<<EOS
Trivial HTTP 0.x client
Syntax: php {$argv[0]} [hostname] [resource]
Example: php {$argv[0]} www.google.com /

EOS;
    exit();
}

$base = new EventBase();

$dns_base = new EventDnsBase($base, TRUE); // We'll use async DNS resolving
if (!$dns_base) {
    exit('Failed to init DNS Base'.PHP_EOL);
}

$bev = new EventBufferEvent($base, /* use internal socket */ NULL,
    EventBufferEvent::OPT_CLOSE_ON_FREE | EventBufferEvent::OPT_DEFER_CALLBACKS,
    'readcb', /* writecb */ NULL, 'eventcb'
);
if (!$bev) {
    exit('Failed creating bufferevent socket'.PHP_EOL);
}

//$bev->setCallbacks('readcb', /* writecb */ NULL, 'eventcb', $base);
$bev->enable(Event::READ | Event::WRITE);

$output = $bev->output; //$bev->getOutput();
if (!$output->add(
    'GET '.$argv[2].' HTTP/1.0'."\r\n".
    'Host: '.$argv[1]."\r\n".
    'Connection: Close'."\r\n\r\n"
)) {
    exit('Failed adding request to output buffer\n');
}

if (!$bev->connectHost($dns_base, $argv[1], 80, EventUtil::AF_UNSPEC)) {
    exit('Can\'t connect to host '.$argv[1].PHP_EOL);
}

$base->dispatch();
?>

See also Event and libevent.

1.2.1496.1. Specs

Short name	Extensions/Extevent
Rulesets	All, Appinfo, CE
Exakat since	0.8.4
PHP Version	All
Severity
Time To Fix
Precision	Very high
Available in	Entreprise Edition, Community Edition, Exakat Cloud