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一般的定时器是怎么实现的呢?我总结如下:
1.使用Crontab工具,写一个shell脚本,在脚本中调用PHP文件,然后定期执行该脚本;
2.ignore_user_abort()和set_time_limit()配合使用;
3.pcntl_alarm;
4.swoole异步毫秒定时器
Timer做定时器,直接上代码~~
服务端代码(server.php)
<?php
/*
swoole Task运行实例
Task简介
Swoole的业务逻辑部分是同步阻塞运行的,如果遇到一些耗时较大的操作,例如访问数据库、广播消息等,就会影响服务器的响应速度。因此Swoole提供了Task功能,将这些耗时操作放到另外的进程去处理,当前进程继续执行后面的逻辑.
运行Task,需要在swoole服务中配置参数 task_worker_num,即可开启task功能。此外,必须给swoole_server绑定两个回调函数:onTask和onFinish。这两个回调函数分别用于执行Task任务和处理Task任务的返回结果。
*/
class server
{
private $serv;
/**
* [__construct description]
* 构造方法中,初始化 $serv 服务
*/
public function __construct() {
$this->serv = new swoole_server('0.0.0.0', 9501);
//初始化swoole服务
$this->serv->set(array(
'worker_num' => 8,
'daemonize' => false, //是否作为守护进程,此配置一般配合log_file使用
'max_request' => 1000,
'log_file' => './swoole.log',
'task_worker_num' => 8
));
//设置监听
$this->serv->on('Start', array($this, 'onStart'));
$this->serv->on('Connect', array($this, 'onConnect'));
$this->serv->on("Receive", array($this, 'onReceive'));
$this->serv->on("Close", array($this, 'onClose'));
$this->serv->on("Task", array($this, 'onTask'));
$this->serv->on("Finish", array($this, 'onFinish'));
//开启
$this->serv->start();
}
public function onStart($serv) {
echo SWOOLE_VERSION . " onStart\n";
}
public function onConnect($serv, $fd) {
echo $fd."Client Connect.\n";
}
public function onReceive($serv, $fd, $from_id, $data) {
echo "Get Message From Client {$fd}:{$data}\n";
// send a task to task worker.
$param = array(
'fd' => $fd
);
// start a task
$serv->task(json_encode($param));
echo "Continue Handle Worker\n";
}
public function onClose($serv, $fd) {
echo "Client Close.\n";
}
public function onTask($serv, $task_id, $from_id, $data) {
echo "This Task {$task_id} from Worker {$from_id}\n";
echo "Data: {$data}\n";
for($i = 0 ; $i < 2 ; $i ++ ) {
sleep(1);
echo "Task {$task_id} Handle {$i} times...\n";
}
$fd = json_decode($data, true);
$serv->send($fd['fd'] , "Data in Task {$task_id}");
return "Task {$task_id}'s result";
}
public function onFinish($serv,$task_id, $data) {
echo "Task {$task_id} finish\n";
echo "Result: {$data}\n";
}
}
$server = new server();
客户端代码(client.php)
<?php
class Client
{
private $client;
public function __construct() {
$this->client = new swoole_client(SWOOLE_SOCK_TCP, SWOOLE_SOCK_ASYNC);
$this->client->on('Connect', array($this, 'onConnect'));
$this->client->on('Receive', array($this, 'onReceive'));
$this->client->on('Close', array($this, 'onClose'));
$this->client->on('Error', array($this, 'onError'));
}
public function connect() {
if(!$fp = $this->client->connect("127.0.0.1", 9501 , 1)) {
echo "Error: {$fp->errMsg}[{$fp->errCode}]\n";
return;
}
}
//connect之后,会调用onConnect方法
public function onConnect($cli) {
fwrite(STDOUT, "Enter Msg:");
swoole_event_add(STDIN,function(){
fwrite(STDOUT, "Enter Msg:");
$msg = trim(fgets(STDIN));
$this->send($msg);
});
}
public function onClose($cli) {
echo "Client close connection\n";
}
public function onError() {
}
public function onReceive($cli, $data) {
echo "Received: ".$data."\n";
}
public function send($data) {
$this->client->send($data);
}
public function isConnected($cli) {
return $this->client->isConnected();
}
}
$client = new Client();
$client->connect();
运行服务端: php server.php
运行客户端: php client.php
结果:
服务端
客户端:
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