int \Workerman\Timer::add(float $time_interval, callable $callback [,$args = array(), bool $persistent = true])
定期執行某個函數或類方法。
注意:計時器是在當前進程中運行的,Workerman中不會創建新的進程或者線程去運行計時器。
參數
time_interval
多長時間執行一次,單位秒,支持小數,可以精確到0.001,即精確到毫秒級別。
callback
回調函數注意:如果回調函數是類的方法,則方法必須是public屬性
args
回調函數的參數,必須為數組,數組元素為參數值
persistent
是否是持久的,如果只想定時執行一次,則傳遞false(只執行一次的任務在執行完畢後會自動銷毀,不必調用Timer::del()
)。默認是true,即一直定時執行。
返回值
返回一個整數,代表計時器的timerid,可以通過調用Timer::del($timerid)
銷毀這個計時器。
示例
1、定時函數為匿名函數(閉包)
use Workerman\Worker;
use Workerman\Timer;
require_once __DIR__ . '/vendor/autoload.php';
$task = new Worker();
// 開啟多少個進程運行定時任務,注意業務是否在多進程有並發問題
$task->count = 1;
$task->onWorkerStart = function(Worker $task)
{
// 每2.5秒執行一次
$time_interval = 2.5;
Timer::add($time_interval, function()
{
echo "task run\n";
});
};
// 運行worker
Worker::runAll();
2、只在指定進程中設置定時器
一個worker實例有4個進程,只在id編號為0的進程上設置定時器。
use Workerman\Worker;
use Workerman\Timer;
require_once __DIR__ . '/vendor/autoload.php';
$worker = new Worker();
$worker->count = 4;
$worker->onWorkerStart = function(Worker $worker)
{
// 只在id編號為0的進程上設置定時器,其它1、2、3號進程不設置定時器
if($worker->id === 0)
{
Timer::add(1, function(){
echo "4個worker進程,只在0號進程設置定時器\n";
});
}
};
// 運行worker
Worker::runAll();
3、定時函數為匿名函數,利用閉包傳遞參數
use Workerman\Worker;
use Workerman\Timer;
use Workerman\Connection\TcpConnection;
require_once __DIR__ . '/vendor/autoload.php';
$ws_worker = new Worker('websocket://0.0.0.0:8080');
$ws_worker->count = 8;
// 連接建立時給對應連接設置定時器
$ws_worker->onConnect = function(TcpConnection $connection)
{
// 每10秒執行一次
$time_interval = 10;
$connect_time = time();
// 給connection對象臨時添加一個timer_id屬性保存定時器id
$connection->timer_id = Timer::add($time_interval, function()use($connection, $connect_time)
{
$connection->send($connect_time);
});
};
// 連接關閉時,刪除對應連接的定時器
$ws_worker->onClose = function(TcpConnection $connection)
{
// 刪除定時器
Timer::del($connection->timer_id);
};
// 運行worker
Worker::runAll();
4、定時函數為匿名函數,利用定時器接口傳遞參數
use Workerman\Worker;
use Workerman\Timer;
use Workerman\Connection\TcpConnection;
require_once __DIR__ . '/vendor/autoload.php';
$ws_worker = new Worker('websocket://0.0.0.0:8080');
$ws_worker->count = 8;
// 連接建立時給對應連接設置定時器
$ws_worker->onConnect = function(TcpConnection $connection)
{
// 每10秒執行一次
$time_interval = 10;
$connect_time = time();
// 給connection對象臨時添加一個timer_id屬性保存定時器id
$connection->timer_id = Timer::add($time_interval, function($connection, $connect_time)
{
$connection->send($connect_time);
}, array($connection, $connect_time));
};
// 連接關閉時,刪除對應連接的定時器
$ws_worker->onClose = function(TcpConnection $connection)
{
// 刪除定時器
Timer::del($connection->timer_id);
};
// 運行worker
Worker::runAll();
5、定時函數為普通函數
use Workerman\Worker;
use Workerman\Timer;
require_once __DIR__ . '/vendor/autoload.php';
// 普通的函數
function send_mail($to, $content)
{
echo "send mail ...\n";
}
$task = new Worker();
$task->onWorkerStart = function(Worker $task)
{
$to = 'workerman@workerman.net';
$content = 'hello workerman';
// 10秒後執行發送郵件任務,最後一個參數傳遞false,表示只運行一次
Timer::add(10, 'send_mail', array($to, $content), false);
};
// 運行worker
Worker::runAll();
6、定時函數為類的方法
use Workerman\Worker;
use Workerman\Timer;
require_once __DIR__ . '/vendor/autoload.php';
class Mail
{
// 注意,回調函數屬性必須是public
public function send($to, $content)
{
echo "send mail ...\n";
}
}
$task = new Worker();
$task->onWorkerStart = function($task)
{
// 10秒後發送一次郵件
$mail = new Mail();
$to = 'workerman@workerman.net';
$content = 'hello workerman';
Timer::add(10, array($mail, 'send'), array($to, $content), false);
};
// 運行worker
Worker::runAll();
7、定時函數為類方法(類內部使用定時器)
use Workerman\Worker;
use Workerman\Timer;
require_once __DIR__ . '/vendor/autoload.php';
class Mail
{
// 注意,回調函數屬性必須是public
public function send($to, $content)
{
echo "send mail ...\n";
}
public function sendLater($to, $content)
{
// 回調的方法屬於當前的類,則回調數組第一個元素為$this
Timer::add(10, array($this, 'send'), array($to, $content), false);
}
}
$task = new Worker();
$task->onWorkerStart = function(Worker $task)
{
// 10秒後發送一次郵件
$mail = new Mail();
$to = 'workerman@workerman.net';
$content = 'hello workerman';
$mail->sendLater($to, $content);
};
// 運行worker
Worker::runAll();
8、定時函數為類的靜態方法
use Workerman\Worker;
use Workerman\Timer;
require_once __DIR__ . '/vendor/autoload.php';
class Mail
{
// 注意這個是靜態方法,回調函數屬性也必須是public
public static function send($to, $content)
{
echo "send mail ...\n";
}
}
$task = new Worker();
$task->onWorkerStart = function(Worker $task)
{
// 10秒後發送一次郵件
$to = 'workerman@workerman.net';
$content = 'hello workerman';
// 定時調用類的靜態方法
Timer::add(10, array('Mail', 'send'), array($to, $content), false);
};
// 運行worker
Worker::runAll();
9、定時函數為類的靜態方法(帶命名空間)
namespace Task;
use Workerman\Worker;
use Workerman\Timer;
require_once __DIR__ . '/vendor/autoload.php';
class Mail
{
// 注意這個是靜態方法,回調函數屬性也必須是public
public static function send($to, $content)
{
echo "send mail ...\n";
}
}
$task = new Worker();
$task->onWorkerStart = function(Worker $task)
{
// 10秒後發送一次郵件
$to = 'workerman@workerman.net';
$content = 'hello workerman';
// 定時調用帶命名空間的類的靜態方法
Timer::add(10, array('\Task\Mail', 'send'), array($to, $content), false);
};
// 運行worker
Worker::runAll();
10、定時器中銷毀當前定時器(use閉包方式傳遞$timer_id)
use Workerman\Worker;
use Workerman\Timer;
require_once __DIR__ . '/vendor/autoload.php';
$task = new Worker();
$task->onWorkerStart = function(Worker $task)
{
// 計數
$count = 1;
// 要想$timer_id能正確傳遞到回調函數內部,$timer_id前面必須加地址符 &
$timer_id = Timer::add(1, function()use(&$timer_id, &$count)
{
echo "Timer run $count\n";
// 運行10次後銷毀當前定時器
if($count++ >= 10)
{
echo "Timer::del($timer_id)\n";
Timer::del($timer_id);
}
});
};
// 運行worker
Worker::runAll();
11、定時器中銷毀當前定時器(參數方式傳遞$timer_id)
use Workerman\Worker;
use Workerman\Timer;
require_once __DIR__ . '/vendor/autoload.php';
class Mail
{
public function send($to, $content, $timer_id)
{
// 臨時給當前對象添加一個count屬性,記錄定時器運行次數
$this->count = empty($this->count) ? 1 : $this->count;
// 運行10次後銷毀當前定時器
echo "send mail {$this->count}...\n";
if($this->count++ >= 10)
{
echo "Timer::del($timer_id)\n";
Timer::del($timer_id);
}
}
}
$task = new Worker();
$task->onWorkerStart = function(Worker $task)
{
$mail = new Mail();
// 要想$timer_id能正確傳遞到回調函數內部,$timer_id前面必須加地址符 &
$timer_id = Timer::add(1, array($mail, 'send'), array('to', 'content', &$timer_id));
};
// 運行worker
Worker::runAll();