(PECL libevent >= 0.0.1)

event_addAdd an event to the set of monitored events


bool event_add ( resource $event [, int $timeout = -1 ] )

event_add() schedules the execution of the event when the event specified in event_set() occurs or in at least the time specified by the timeout argument. If timeout was not specified, not timeout is set. The event must be already initalized by event_set() and event_base_set() functions. If the event already has a timeout set, it is replaced by the new one.



Valid event resource.


Optional timeout (in microseconds).

Значення, що повертаються

event_add() returns TRUE on success or FALSE on error.

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User Contributed Notes 1 note

zhaoyong dot lc at gmail dot com
10 years ago
This is a Timer example use pcntl and libevent

function newChild($func_name) {
    echo "enter newChild\n";
    $args = func_get_args();
    $pid =  pcntl_fork();
    if ($pid == 0) {
        function_exists($func_name) and exit(call_user_func_array($func_name, $args)) or exit(-1);
    } else if($pid == -1) {
        echo "Couldn't create child process";
    } else {
        return $pid;

function on_timer() {
    echo "timer called\n";

* @param $func string, function name
* @param $timeouts int, microtimes for time delay
function timer($func, $timeouts){

    echo "enter timer\n";
    $base = event_base_new();
    $event = event_new();

    event_set($event, 0, EV_TIMEOUT, $func);
    event_base_set($event, $base);
    event_add($event, $timeouts);


$pid = newChild("timer", "on_timer", 5000000);

if ($pid > 0) {
    echo "master process exit\n";
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