PHP Manual
EvWatcher
Configures whether to keep the loop from returning

EvWatcher::keepalive

(PECL ev >= 0.2.0)

EvWatcher::keepalive — Configures whether to keep the loop from returning

说明

public EvWatcher::keepalive ([ bool $value ] ) : bool

Configures whether to keep the loop from returning. With keepalive value set to FALSE the watcher won't keep Ev::run() / EvLoop::run() from returning even though the watcher is active.

Watchers have keepalive value TRUE by default.

Clearing keepalive status is useful when returning from Ev::run() / EvLoop::run() just because of the watcher is undesirable. It could be a long running UDP socket watcher or so.

参数

value: With keepalive value set to FALSE the watcher won't keep Ev::run() / EvLoop::run() from returning even though the watcher is active.

返回值

Returns the previous state.

范例

Example #1 Register an I/O watcher for some UDP socket but do not keep the event loop from running just because of that watcher.

 <?php
$udp_socket = ...
$udp_watcher = new EvIo($udp_socket, Ev::READ, function () { /* ... */ });
$udp_watcher->keepalive(FALSE);
?>

php eventbuffer read data from a file onto the end of the buffer php evloop returns the current event loop time php evperiodic configures the watcher php evwatcher clear watcher pending status php evwatcher feeds the given revents set into the event loop php evwatcher returns the loop responsible for the watcher php evwatcher configures whether to keep the loop from returning php ffi creates a php string from a memory area php apc 函数 loads a set of constants from the cache php session 函数 unregister a global variable from the current session php socket 函数 receives data from a socket whether or not it is connection oriented php sqlite 函数 encode binary data before returning it from an udf php statistic 函数 generates a random deviate from the gamma distribution php svn 函数 delete items from a working copy or repository php date/time 函数 returns the timezone name from abbreviation php 杂项函数 unpack data from binary string php mysql xdevapi schema drop collection from schema php postgresql pdo copy data from database table into php array php pht queue returns the first value from a queue php swoole client remove the tcp client from system event loop.