Exemple

Example #1 Simple HTTP client

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

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

    while ((
$n $bev->input->remove($buf1024)) > 0) {
        echo 
$buf;
    }
}

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

        echo 
"Closing\n";
        
$base->exit();
        exit(
"Done\n");
    }
}

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();

$dns_base = new EventDnsBase($baseTRUE); // We'll use async DNS resolving
if (!$dns_base) {
    exit(
"Failed to init DNS Base\n");
}

$bev = new EventBufferEvent($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\n");
}

//$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$argv[1], 80EventUtil::AF_UNSPEC)) {
    exit(
"Can't connect to host {$argv[1]}\n");
}

$base->dispatch();
?>

Exemplul de mai sus va afișa ceva similar cu:

Connected.
HTTP/1.1 301 Moved Permanently
Date: Fri, 01 Mar 2013 18:47:48 GMT
Location: http://www.google.co.uk/
Content-Type: text/html; charset=UTF-8
Cache-Control: public, max-age=2592000
Server: gws
Content-Length: 221
X-XSS-Protection: 1; mode=block
X-Frame-Options: SAMEORIGIN
Age: 133438
Expires: Sat, 30 Mar 2013 05:39:28 GMT
Connection: close

<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
<TITLE>301 Moved</TITLE></HEAD><BODY>
<H1>301 Moved</H1>
The document has moved
<A HREF="http://www.google.co.uk/">here</A>.
</BODY></HTML>
Closing
Done

Example #2 HTTP client using asynchronous DNS resolver

<?php
/*
 * 1. Connect to 127.0.0.1 at port 80
 * by means of EventBufferEvent::connect().
 *
 * 2. Request /index.cphp via HTTP/1.0
 * using the output buffer.
 *
 * 3. Asyncronously read the response and print it to stdout.
 */

// Read callback
function readcb($bev$base) {
    
$input $bev->getInput();

    while ((
$n $input->remove($buf1024)) > 0) {
        echo 
$buf;
    }
}

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

        echo 
"Closing\n";
        
$base->exit();
        exit(
"Done\n");
    }
}

$base = new EventBase();

echo 
"step 1\n";
$bev = new EventBufferEvent($base/* use internal socket */ NULL,
    
EventBufferEvent::OPT_CLOSE_ON_FREE EventBufferEvent::OPT_DEFER_CALLBACKS);
if (!
$bev) {
    exit(
"Failed creating bufferevent socket\n");
}

echo 
"step 2\n";
$bev->setCallbacks("readcb"/* writecb */ NULL"eventcb"$base);
$bev->enable(Event::READ Event::WRITE);

echo 
"step 3\n";
// Send request
$output $bev->getOutput();
if (!
$output->add(
    
"GET /index.cphp HTTP/1.0\r\n".
    
"Connection: Close\r\n\r\n"
)) {
    exit(
"Failed adding request to output buffer\n");
}

/* Connect to the host syncronously.
We know the IP, and don't need to resolve DNS. */
if (!$bev->connect("127.0.0.1:80")) {
    exit(
"Can't connect to host\n");
}

// Dispatch pending events
$base->dispatch();
?>

Example #3 Echo server

<?php
/*
 * Simple echo server based on libevent's connection listener.
 *
 * Usage:
 * 1) In one terminal window run:
 *
 * $ php listener.php 9881
 *
 * 2) In another terminal window open up connection, e.g.:
 *
 * $ nc 127.0.0.1 9881
 *
 * 3) start typing. The server should repeat the input.
 */

class MyListenerConnection {
    private 
$bev$base;

    public function 
__destruct() {
        
$this->bev->free();
    }

    public function 
__construct($base$fd) {
        
$this->base $base;

        
$this->bev = new EventBufferEvent($base$fdEventBufferEvent::OPT_CLOSE_ON_FREE);

        
$this->bev->setCallbacks(array($this"echoReadCallback"), NULL,
            array(
$this"echoEventCallback"), NULL);

        if (!
$this->bev->enable(Event::READ)) {
            echo 
"Failed to enable READ\n";
            return;
        }
    }

    public function 
echoReadCallback($bev$ctx) {
        
// Copy all the data from the input buffer to the output buffer

        // Variant #1
        
$bev->output->addBuffer($bev->input);

        
/* Variant #2 */
        /*
        $input    = $bev->getInput();
        $output = $bev->getOutput();
        $output->addBuffer($input);
        */
    
}

    public function 
echoEventCallback($bev$events$ctx) {
        if (
$events EventBufferEvent::ERROR) {
            echo 
"Error from bufferevent\n";
        }

        if (
$events & (EventBufferEvent::EOF EventBufferEvent::ERROR)) {
            
//$bev->free();
            
$this->__destruct();
        }
    }
}

class 
MyListener {
    public 
$base,
        
$listener,
        
$socket;
    private 
$conn = array();

    public function 
__destruct() {
        foreach (
$this->conn as &$c$c NULL;
    }

    public function 
__construct($port) {
        
$this->base = new EventBase();
        if (!
$this->base) {
            echo 
"Couldn't open event base";
            exit(
1);
        }

        
// Variant #1
        /*
        $this->socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
        if (!socket_bind($this->socket, '0.0.0.0', $port)) {
            echo "Unable to bind socket\n";
            exit(1);
        }
        $this->listener = new EventListener($this->base,
            array($this, "acceptConnCallback"), $this->base,
            EventListener::OPT_CLOSE_ON_FREE | EventListener::OPT_REUSEABLE,
            -1, $this->socket);
         */

        // Variant #2
         
$this->listener = new EventListener($this->base,
             array(
$this"acceptConnCallback"), $this->base,
             
EventListener::OPT_CLOSE_ON_FREE EventListener::OPT_REUSEABLE, -1,
             
"0.0.0.0:$port");

        if (!
$this->listener) {
            echo 
"Couldn't create listener";
            exit(
1);
        }

        
$this->listener->setErrorCallback(array($this"accept_error_cb"));
    }

    public function 
dispatch() {
        
$this->base->dispatch();
    }

    
// This callback is invoked when there is data to read on $bev
    
public function acceptConnCallback($listener$fd$address$ctx) {
        
// We got a new connection! Set up a bufferevent for it. */
        
$base $this->base;
        
$this->conn[] = new MyListenerConnection($base$fd);
    }

    public function 
accept_error_cb($listener$ctx) {
        
$base $this->base;

        
fprintf(STDERR"Got an error %d (%s) on the listener. "
            
."Shutting down.\n",
            
EventUtil::getLastSocketErrno(),
            
EventUtil::getLastSocketError());

        
$base->exit(NULL);
    }
}

$port 9808;

if (
$argc 1) {
    
$port = (int) $argv[1];
}
if (
$port <= || $port 65535) {
    exit(
"Invalid port");
}

$l = new MyListener($port);
$l->dispatch();
?>

Example #4 SSL echo server

<?php
/*
 * SSL echo server
 *
 * To test:
 * 1) Run:
 * $ php examples/ssl-echo-server/server.php 9998
 *
 * 2) in another terminal window run:
 * $ socat - SSL:127.0.0.1:9998,verify=1,cafile=examples/ssl-echo-server/cert.pem
 */

class MySslEchoServer {
    public 
$port,
        
$base,
        
$bev,
        
$listener,
        
$ctx;

    function 
__construct ($port$host "127.0.0.1") {
        
$this->port $port;
        
$this->ctx $this->init_ssl();
        if (!
$this->ctx) {
            exit(
"Failed creating SSL context\n");
        }

        
$this->base = new EventBase();
        if (!
$this->base) {
            exit(
"Couldn't open event base\n");
        }

        
$this->listener = new EventListener($this->base,
            array(
$this"ssl_accept_cb"), $this->ctx,
            
EventListener::OPT_CLOSE_ON_FREE EventListener::OPT_REUSEABLE,
            -
1"$host:$port");
        if (!
$this->listener) {
            exit(
"Couldn't create listener\n");
        }

        
$this->listener->setErrorCallback(array($this"accept_error_cb"));
    }
    function 
dispatch() {
        
$this->base->dispatch();
    }

    
// This callback is invoked when there is data to read on $bev.
    
function ssl_read_cb($bev$ctx) {
        
$in $bev->input//$bev->getInput();

        
printf("Received %zu bytes\n"$in->length);
        
printf("----- data ----\n");
        
printf("%ld:\t%s\n", (int) $in->length$in->pullup(-1));

        
$bev->writeBuffer($in);
    }

    
// This callback is invoked when some even occurs on the event listener,
    // e.g. connection closed, or an error occured
    
function ssl_event_cb($bev$events$ctx) {
        if (
$events EventBufferEvent::ERROR) {
            
// Fetch errors from the SSL error stack
            
while ($err $bev->sslError()) {
                
fprintf(STDERR"Bufferevent error %s.\n"$err);
            }
        }

        if (
$events & (EventBufferEvent::EOF EventBufferEvent::ERROR)) {
            
$bev->free();
        }
    }

    
// This callback is invoked when a client accepts new connection
    
function ssl_accept_cb($listener$fd$address$ctx) {
        
// We got a new connection! Set up a bufferevent for it.
        
$this->bev EventBufferEvent::sslSocket($this->base$fd$this->ctx,
            
EventBufferEvent::SSL_ACCEPTINGEventBufferEvent::OPT_CLOSE_ON_FREE);

        if (!
$this->bev) {
            echo 
"Failed creating ssl buffer\n";
            
$this->base->exit(NULL);
            exit(
1);
        }

        
$this->bev->enable(Event::READ);
        
$this->bev->setCallbacks(array($this"ssl_read_cb"), NULL,
            array(
$this"ssl_event_cb"), NULL);
    }

    
// This callback is invoked when we failed to setup new connection for a client
    
function accept_error_cb($listener$ctx) {
        
fprintf(STDERR"Got an error %d (%s) on the listener. "
            
."Shutting down.\n",
            
EventUtil::getLastSocketErrno(),
            
EventUtil::getLastSocketError());

        
$this->base->exit(NULL);
    }

    
// Initialize SSL structures, create an EventSslContext
    // Optionally create self-signed certificates
    
function init_ssl() {
        
// We *must* have entropy. Otherwise there's no point to crypto.
        
if (!EventUtil::sslRandPoll()) {
            exit(
"EventUtil::sslRandPoll failed\n");
        }

        
$local_cert __DIR__."/cert.pem";
        
$local_pk   __DIR__."/privkey.pem";

        if (!
file_exists($local_cert) || !file_exists($local_pk)) {
            echo 
"Couldn't read $local_cert or $local_pk file.  To generate a key\n",
                
"and self-signed certificate, run:\n",
                
"  openssl genrsa -out $local_pk 2048\n",
                
"  openssl req -new -key $local_pk -out cert.req\n",
                
"  openssl x509 -req -days 365 -in cert.req -signkey $local_pk -out $local_cert\n";

            return 
FALSE;
        }

        
$ctx = new EventSslContext(EventSslContext::SSLv3_SERVER_METHOD, array (
             
EventSslContext::OPT_LOCAL_CERT  => $local_cert,
             
EventSslContext::OPT_LOCAL_PK    => $local_pk,
             
//EventSslContext::OPT_PASSPHRASE  => "echo server",
             
EventSslContext::OPT_VERIFY_PEER => true,
             
EventSslContext::OPT_ALLOW_SELF_SIGNED => false,
        ));

        return 
$ctx;
    }
}

// Allow to override the port
$port 9999;
if (
$argc 1) {
    
$port = (int) $argv[1];
}
if (
$port <= || $port 65535) {
    exit(
"Invalid port\n");
}


$l = new MySslEchoServer($port);
$l->dispatch();
?>

Example #5 Signal handler

<?php
/*
Launch it in a terminal window:

$ php examples/signal.php

In another terminal window find out the pid and send SIGTERM, e.g.:

$ ps aux | grep examp
ruslan    3976  0.2  0.0 139896 11256 pts/1    S+   10:25   0:00 php examples/signal.php
ruslan    3978  0.0  0.0   9572   864 pts/2    S+   10:26   0:00 grep --color=auto examp
$ kill -TERM 3976

At the first terminal window you should catch the following:

Caught signal 15
*/
class MyEventSignal {
    private 
$base;

    function 
__construct($base) {
        
$this->base $base;
    }

    function 
eventSighandler($no$c) {
        echo 
"Caught signal $no\n";
        
event_base_loopexit($c->base);
    }
}

$base event_base_new();
$c    = new MyEventSignal($base);
$no   SIGTERM;
$ev   evsignal_new($base$no, array($c,'eventSighandler'), $c);

evsignal_add($ev);

event_base_loop($base);
?>

Example #6 Use libevent's loop to process requests of `eio' extension

<?php
// Callback for eio_nop()
function my_nop_cb($d$r) {
    echo 
"step 6\n";
}

$dir "/tmp/abc-eio-temp";
if (
file_exists($dir)) {
    
rmdir($dir);
}

echo 
"step 1\n";

$base = new EventBase();

echo 
"step 2\n";

eio_init();

eio_mkdir($dir0750EIO_PRI_DEFAULT"my_nop_cb");

$event = new Event($baseeio_get_event_stream(),
    
Event::READ Event::PERSIST, function ($fd$events$base) {
    echo 
"step 5\n";

    while (
eio_nreqs()) {
        
eio_poll();
    }

    
$base->stop();
}, 
$base);

echo 
"step 3\n";

$event->add();

echo 
"step 4\n";

$base->dispatch();

echo 
"Done\n";
?>

Example #7 Miscellaneous

<?php
/* {{{ Config & supported stuff */
echo "Supported methods:\n";
foreach (
Event::getSupportedMethods() as $m) {
    echo 
$mPHP_EOL;
}

// Avoiding "select" method
$cfg = new EventConfig();
if (
$cfg->avoidMethod("select")) {
    echo 
"`select' method avoided\n";
}

// Create event_base associated with the config
$base = new EventBase($cfg);
echo 
"Event method used: "$base->getMethod(), PHP_EOL;

echo 
"Features:\n";
$features $base->getFeatures();
(
$features EventConfig::FEATURE_ET) and print("ET - edge-triggered IO\n");
(
$features EventConfig::FEATURE_O1) and print("O1 - O(1) operation for adding/deletting events\n");
(
$features EventConfig::FEATURE_FDS) and print("FDS - arbitrary file descriptor types, and not just sockets\n");

// Require FDS feature
if ($cfg->requireFeatures(EventConfig::FEATURE_FDS)) {
    echo 
"FDS feature is now requried\n";

    
$base = new EventBase($cfg);
    (
$base->getFeatures() & EventConfig::FEATURE_FDS)
        and print(
"FDS - arbitrary file descriptor types, and not just sockets\n");
}
/* }}} */

/* {{{ Base */
$base = new EventBase();
$event = new Event($baseSTDINEvent::READ Event::PERSIST, function ($fd$events$arg) {
    static 
$max_iterations 0;

    if (++
$max_iterations >= 5) {
        
/* exit after 5 iterations with timeout of 2.33 seconds */
        
echo "Stopping...\n";
        
$arg[0]->exit(2.33);
    }

    echo 
fgets($fd);
}, array (&
$base));

$event->add();
$base->loop();
/* Base }}} */
?>

Example #8 Simple HTTP server

<?php
/*
 * Simple HTTP server.
 *
 * To test it:
 * 1) Run it on a port of your choice, e.g.:
 * $ php examples/http.php 8010
 * 2) In another terminal connect to some address on this port
 * and make GET or POST request(others are turned off here), e.g.:
 * $ nc -t 127.0.0.1 8010
 * POST /about HTTP/1.0
 * Content-Type: text/plain
 * Content-Length: 4
 * Connection: close
 * (press Enter)
 *
 * It will output
 * a=12
 * HTTP/1.0 200 OK
 * Content-Type: text/html; charset=ISO-8859-1
 * Connection: close
 *
 * $ nc -t 127.0.0.1 8010
 * GET /dump HTTP/1.0
 * Content-Type: text/plain
 * Content-Encoding: UTF-8
 * Connection: close
 * (press Enter)
 *
 * It will output:
 * HTTP/1.0 200 OK
 * Content-Type: text/html; charset=ISO-8859-1
 * Connection: close
 * (press Enter)
 *
 * $ nc -t 127.0.0.1 8010
 * GET /unknown HTTP/1.0
 * Connection: close
 *
 * It will output:
 * HTTP/1.0 200 OK
 * Content-Type: text/html; charset=ISO-8859-1
 * Connection: close
 *
 * 3) See what the server outputs on the previous terminal window.
 */

function _http_dump($req$data) {
    static 
$counter      0;
    static 
$max_requests 2;

    if (++
$counter >= $max_requests)  {
        echo 
"Counter reached max requests $max_requests. Exiting\n";
        exit();
    }

    echo 
__METHOD__" called\n";
    echo 
"request:"var_dump($req);
    echo 
"data:"var_dump($data);

    echo 
"\n===== DUMP =====\n";
    echo 
"Command:"$req->getCommand(), PHP_EOL;
    echo 
"URI:"$req->getUri(), PHP_EOL;
    echo 
"Input headers:"var_dump($req->getInputHeaders());
    echo 
"Output headers:"var_dump($req->getOutputHeaders());

    echo 
"\n >> Sending reply ...";
    
$req->sendReply(200"OK");
    echo 
"OK\n";

    echo 
"\n >> Reading input buffer ...\n";
    
$buf $req->getInputBuffer();
    while (
$s $buf->readLine(EventBuffer::EOL_ANY)) {
        echo 
$sPHP_EOL;
    }
    echo 
"No more data in the buffer\n";
}

function 
_http_about($req) {
    echo 
__METHOD__PHP_EOL;
    echo 
"URI: "$req->getUri(), PHP_EOL;
    echo 
"\n >> Sending reply ...";
    
$req->sendReply(200"OK");
    echo 
"OK\n";
}

function 
_http_default($req$data) {
    echo 
__METHOD__PHP_EOL;
    echo 
"URI: "$req->getUri(), PHP_EOL;
    echo 
"\n >> Sending reply ...";
    
$req->sendReply(200"OK");
    echo 
"OK\n";
}

$port 8010;
if (
$argc 1) {
    
$port = (int) $argv[1];
}
if (
$port <= || $port 65535) {
    exit(
"Invalid port");
}

$base = new EventBase();
$http = new EventHttp($base);
$http->setAllowedMethods(EventHttpRequest::CMD_GET EventHttpRequest::CMD_POST);

$http->setCallback("/dump""_http_dump", array(48));
$http->setCallback("/about""_http_about");
$http->setDefaultCallback("_http_default""custom data value");

$http->bind("0.0.0.0"8010);
$base->loop();
?>

Exemplul de mai sus va afișa ceva similar cu:

a=12
HTTP/1.0 200 OK
Content-Type: text/html; charset=ISO-8859-1
Connection: close

HTTP/1.0 200 OK
Content-Type: text/html; charset=ISO-8859-1
Connection: close
(press Enter)

HTTP/1.0 200 OK
Content-Type: text/html; charset=ISO-8859-1
Connection: close

Example #9 EventHttpConnection::makeRequest() example

<?php
function _request_handler($req$base) {
    echo 
__FUNCTION__PHP_EOL;

    if (
is_null($req)) {
        echo 
"Timed out\n";
    } else {
        
$response_code $req->getResponseCode();

        if (
$response_code == 0) {
            echo 
"Connection refused\n";
        } elseif (
$response_code != 200) {
            echo 
"Unexpected response: $response_code\n";
        } else {
            echo 
"Success: $response_code\n";
            
$buf $req->getInputBuffer();
            echo 
"Body:\n";
            while (
$s $buf->readLine(EventBuffer::EOL_ANY)) {
                echo 
$sPHP_EOL;
            }
        }
    }

    
$base->exit(NULL);
}

$address "127.0.0.1";
$port 80;

$base = new EventBase();
$conn = new EventHttpConnection($baseNULL$address$port);
$conn->setTimeout(5);
$req = new EventHttpRequest("_request_handler"$base);

$req->addHeader("Host"$addressEventHttpRequest::OUTPUT_HEADER);
$req->addHeader("Content-Length""0"EventHttpRequest::OUTPUT_HEADER);
$conn->makeRequest($reqEventHttpRequest::CMD_GET"/index.cphp");

$base->loop();
?>

Exemplul de mai sus va afișa ceva similar cu:

_request_handler
Success: 200
Body:
PHP, date:
2013-03-13T20:27:52+05:00

Example #10 Connection listener based on a UNIX domain socket

<?php
/*
 * Simple echo server based on libevent's connection listener.
 *
 * Usage:
 * 1) In one terminal window run:
 *
 * $ php unix-domain-listener.php [path-to-socket]
 *
 * 2) In another terminal window open up connection
 * to the socket, e.g.:
 *
 * $ socat - GOPEN:/tmp/1.sock
 *
 * 3) Start typing. The server should repeat the input.
 */

class MyListenerConnection {
    private 
$bev$base;

    public function 
__destruct() {
        if (
$this->bev) {
            
$this->bev->free();
        }
    }

    public function 
__construct($base$fd) {
        
$this->base $base;

        
$this->bev = new EventBufferEvent($base$fdEventBufferEvent::OPT_CLOSE_ON_FREE);

        
$this->bev->setCallbacks(array($this"echoReadCallback"), NULL,
            array(
$this"echoEventCallback"), NULL);

        if (!
$this->bev->enable(Event::READ)) {
            echo 
"Failed to enable READ\n";
            return;
        }
    }

    public function 
echoReadCallback($bev$ctx) {
        
// Copy all the data from the input buffer to the output buffer
        
$bev->output->addBuffer($bev->input);
    }

    public function 
echoEventCallback($bev$events$ctx) {
        if (
$events EventBufferEvent::ERROR) {
            echo 
"Error from bufferevent\n";
        }

        if (
$events & (EventBufferEvent::EOF EventBufferEvent::ERROR)) {
            
$bev->free();
            
$bev NULL;
        }
    }
}

class 
MyListener {
    public 
$base,
        
$listener,
        
$socket;
    private 
$conn = array();

    public function 
__destruct() {
        foreach (
$this->conn as &$c$c NULL;
    }

    public function 
__construct($sock_path) {
        
$this->base = new EventBase();
        if (!
$this->base) {
            echo 
"Couldn't open event base";
            exit(
1);
        }

        if (
file_exists($sock_path)) {
            
unlink($sock_path);
        }

         
$this->listener = new EventListener($this->base,
             array(
$this"acceptConnCallback"), $this->base,
             
EventListener::OPT_CLOSE_ON_FREE EventListener::OPT_REUSEABLE, -1,
             
"unix:$sock_path");

        if (!
$this->listener) {
            
trigger_error("Couldn't create listener"E_USER_ERROR);
        }

        
$this->listener->setErrorCallback(array($this"accept_error_cb"));
    }

    public function 
dispatch() {
        
$this->base->dispatch();
    }

    
// This callback is invoked when there is data to read on $bev
    
public function acceptConnCallback($listener$fd$address$ctx) {
        
// We got a new connection! Set up a bufferevent for it. */
        
$base $this->base;
        
$this->conn[] = new MyListenerConnection($base$fd);
    }

    public function 
accept_error_cb($listener$ctx) {
        
$base $this->base;

        
fprintf(STDERR"Got an error %d (%s) on the listener. "
            
."Shutting down.\n",
            
EventUtil::getLastSocketErrno(),
            
EventUtil::getLastSocketError());

        
$base->exit(NULL);
    }
}

if (
$argc <= 1) {
    exit(
"Socket path is not provided\n");
}
$sock_path $argv[1];

$l = new MyListener($sock_path);
$l->dispatch();
?>

Example #11 Simple SMTP server

<?php
 
/*
 * Author: Andrew Rose <hello at andrewrose dot co dot uk>
 *
 * Usage:
 * 1) Prepare cert.pem certificate and privkey.pem private key files.
 * 2) Launch the server script
 * 3) Open TLS connection, e.g.:
 *      $ openssl s_client -connect localhost:25 -starttls smtp -crlf
 * 4) Start testing the commands listed in `cmd` method below.
 */

class Handler {
    public 
$domainName FALSE;
    public 
$connections = [];
    public 
$buffers = [];
    public 
$maxRead 256000;

    public function 
__construct() {
        
$this->ctx = new EventSslContext(EventSslContext::SSLv3_SERVER_METHOD, [
            
EventSslContext::OPT_LOCAL_CERT  => 'cert.pem',
            
EventSslContext::OPT_LOCAL_PK    => 'privkey.pem',
            
//EventSslContext::OPT_PASSPHRASE  => '',
            
EventSslContext::OPT_VERIFY_PEER => false// change to true with authentic cert
            
EventSslContext::OPT_ALLOW_SELF_SIGNED => true // change to false with authentic cert
        
]);

        
$this->base = new EventBase();
        if (!
$this->base) {
            exit(
"Couldn't open event base\n");
        }

        if (!
$this->listener = new EventListener($this->base,
            [
$this'ev_accept'],
            
$this->ctx,
            
EventListener::OPT_CLOSE_ON_FREE EventListener::OPT_REUSEABLE,
            -
1,
            
'0.0.0.0:25'))
        {
            exit(
"Couldn't create listener\n");
        }

        
$this->listener->setErrorCallback([$this'ev_error']);
        
$this->base->dispatch();
    }

    public function 
ev_accept($listener$fd$address$ctx) {
        static 
$id 0;
        
$id += 1;

        
$this->connections[$id]['clientData'] = '';
        
$this->connections[$id]['cnx'] = new EventBufferEvent($this->base$fd,
            
EventBufferEvent::OPT_CLOSE_ON_FREE);

        if (!
$this->connections[$id]['cnx']) {
            echo 
"Failed creating buffer\n";
            
$this->base->exit(NULL);
            exit(
1);
        }

        
$this->connections[$id]['cnx']->setCallbacks([$this"ev_read"], NULL,
            [
$this'ev_error'], $id);
        
$this->connections[$id]['cnx']->enable(Event::READ Event::WRITE);

        
$this->ev_write($id'220 '.$this->domainName." wazzzap?\r\n");
    }

    function 
ev_error($listener$ctx) {
        
$errno EventUtil::getLastSocketErrno();

        
fprintf(STDERR"Got an error %d (%s) on the listener. Shutting down.\n",
            
$errnoEventUtil::getLastSocketError());

        if (
$errno != 0) {
            
$this->base->exit(NULL);
            exit();
        }
    }

    public function 
ev_close($id) {
        
$this->connections[$id]['cnx']->disable(Event::READ Event::WRITE);
        unset(
$this->connections[$id]);
    }

    protected function 
ev_write($id$string) {
        echo 
'S('.$id.'): '.$string;
        
$this->connections[$id]['cnx']->write($string);
    }

    public function 
ev_read($buffer$id) {
        while(
$buffer->input->length 0) {
            
$this->connections[$id]['clientData'] .= $buffer->input->read($this->maxRead);
            
$clientDataLen strlen($this->connections[$id]['clientData']);

            if(
$this->connections[$id]['clientData'][$clientDataLen-1] == "\n"
                
&& $this->connections[$id]['clientData'][$clientDataLen-2] == "\r")
            {
                
// remove the trailing \r\n
                
$line substr($this->connections[$id]['clientData'], 0,
                    
strlen($this->connections[$id]['clientData']) - 2);

                
$this->connections[$id]['clientData'] = '';
                
$this->cmd($buffer$id$line);
            }
        }
    }

    protected function 
cmd($buffer$id$line) {
        switch (
$line) {
            case 
strncmp('EHLO '$line4):
                
$this->ev_write($id"250-STARTTLS\r\n");
                
$this->ev_write($id"250 OK ehlo\r\n");
                break;

            case 
strncmp('HELO '$line4):
                
$this->ev_write($id"250-STARTTLS\r\n");
                
$this->ev_write($id"250 OK helo\r\n");
                break;

            case 
strncmp('QUIT'$line3):
                
$this->ev_write($id"250 OK quit\r\n");
                
$this->ev_close($id);
                break;

            case 
strncmp('STARTTLS'$line3):
                
$this->ev_write($id"220 Ready to start TLS\r\n");
                
$this->connections[$id]['cnx'] = EventBufferEvent::sslFilter($this->base,
                    
$this->connections[$id]['cnx'], $this->ctx,
                    
EventBufferEvent::SSL_ACCEPTING,
                    
EventBufferEvent::OPT_CLOSE_ON_FREE);
                
$this->connections[$id]['cnx']->setCallbacks([$this"ev_read"], NULL, [$this'ev_error'], $id);
                
$this->connections[$id]['cnx']->enable(Event::READ Event::WRITE);
                break;

            default:
                echo 
'unknown command: '.$line."\n";
                break;
        }
    }
}

new 
Handler();
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