Examples
Example #1 polling STDIN using basic API
<?php
function print_line($fd, $events, $arg)
{
static $max_requests = 0;
$max_requests++;
if ($max_requests == 10) {
// exit loop after 10 writes
event_base_loopexit($arg[1]);
}
// print the line
echo fgets($fd);
}
// create base and event
$base = event_base_new();
$event = event_new();
$fd = STDIN;
// set event flags
event_set($event, $fd, EV_READ | EV_PERSIST, "print_line", array($event, $base));
// set event base
event_base_set($event, $base);
// enable event
event_add($event);
// start event loop
event_base_loop($base);
?>
Example #2 polling STDIN using buffered event API
<?php
function print_line($buf, $arg)
{
static $max_requests;
$max_requests++;
if ($max_requests == 10) {
event_base_loopexit($arg);
}
// print the line
echo event_buffer_read($buf, 4096);
}
function error_func($buf, $what, $arg)
{
// handle errors
}
$base = event_base_new();
$eb = event_buffer_new(STDIN, "print_line", NULL, "error_func", $base);
event_buffer_base_set($eb, $base);
event_buffer_enable($eb, EV_READ);
event_base_loop($base);
?>
Коментарии
Server example:
<?php
$socket = stream_socket_server ('tcp://0.0.0.0:2000', $errno, $errstr);
stream_set_blocking($socket, 0);
$base = event_base_new();
$event = event_new();
event_set($event, $socket, EV_READ | EV_PERSIST, 'ev_accept', $base);
event_base_set($event, $base);
event_add($event);
event_base_loop($base);
$GLOBALS['connections'] = array();
$GLOBALS['buffers'] = array();
function ev_accept($socket, $flag, $base) {
static $id = 0;
$connection = stream_socket_accept($socket);
stream_set_blocking($connection, 0);
$id += 1;
$buffer = event_buffer_new($connection, 'ev_read', NULL, 'ev_error', $id);
event_buffer_base_set($buffer, $base);
event_buffer_timeout_set($buffer, 30, 30);
event_buffer_watermark_set($buffer, EV_READ, 0, 0xffffff);
event_buffer_priority_set($buffer, 10);
event_buffer_enable($buffer, EV_READ | EV_PERSIST);
// we need to save both buffer and connection outside
$GLOBALS['connections'][$id] = $connection;
$GLOBALS['buffers'][$id] = $buffer;
}
function ev_error($buffer, $error, $id) {
event_buffer_disable($GLOBALS['buffers'][$id], EV_READ | EV_WRITE);
event_buffer_free($GLOBALS['buffers'][$id]);
fclose($GLOBALS['connections'][$id]);
unset($GLOBALS['buffers'][$id], $GLOBALS['connections'][$id]);
}
function ev_read($buffer, $id) {
while ($read = event_buffer_read($buffer, 256)) {
var_dump($read);
}
}
?>