php多线程怎么实现（一览php多线程实现方法）

1、curl_multi方法

当需要多线程的时候，可以用curl_multi一次性请求多个操作来完成，但curl走的是网络通信，效率与可靠性就比较差了的。

function main(){ 
 
 $sql = "select waybill_id,order_id from waybill where status>40 order by update_time desc limit 10 "; 
 
 $data = Yii::app()->db->createCommand($sql)->queryAll(); //yii 框架格式 
 
 foreach ($data as $k => $v) { 
 
 if ($k % 2 == 0) { //偶数发一个网址 
 
 $send_data[$k]['url'] = ''; 
 
 $send_data[$k]['body'] = $v['waybill_id']; 
 
 } else { //奇数发送另外一个网址 
 $send_data[$k]['url'] = 'http://www.abc.com'; 
 
 $send_data[$k]['body']=array($v['order_id'] => array('extra' => 16)); 
 } 
 } 
 }

2、通过stream_socket_client 方式

function sendStream() { 
 $english_format_number = number_format($number, 4, '.', ''); 
 
 echo $english_format_number; 
 exit(); 
 $timeout = 10; 
 $result = array(); 
 $sockets = array(); 
 $convenient_read_block = 8192; 
 $host = "test.local.com"; 
 $sql = "select waybill_id,order_id from xm_waybill where status>40 order by update_time desc limit 1 "; 
 $data = Yii::app()->db->createCommand($sql)->queryAll(); 
 $id = 0; 
 
 foreach ($data as $k => $v) { 
 if ($k % 2 == 0) { 
 $send_data[$k]['body'] = NoticeOrder::getSendData($v['waybill_id']); 
 
 } else { 
 $send_data[$k]['body'] = array($v['order_id'] => array('extra' => 16)); 
 } 
 $data = json_encode($send_data[$k]['body']); 
 $s = stream_socket_client($host . ":80", $errno, $errstr, $timeout, STREAM_CLIENT_ASYNC_CONNECT | STREAM_CLIENT_CONNECT); 
 if ($s) { 
 $sockets[$id++] = $s; 
 $http_message = "GET /php/test.php?data=" . $data . " HTTP/1.0\r\nHost:" . $host . "\r\n\r\n"; 
 fwrite($s, $http_message); 
 } else { 
 echo "Stream " . $id . " failed to open correctly."; 
 } 
 } 
 }

3、通过多进程代替多线程

function daemon($func_name,$args,$number){

while(true){

$pid=pcntl_fork();

if($pid==-1){

echo “fork process fail”;

exit();

}elseif($pid){//创建的子进程

static $num=0;

$num++;

if($num>=$number){

//当进程数量达到一定数量时候，就对子进程进行回收。

pcntl_wait($status);

$num–;

}

}else{ //为0 则代表是子进程创建的，则直接进入工作状态

if(function_exists($func_name)){

while (true) {

$ppid=posix_getpid();

var_dump($ppid);

call_user_func_array($func_name,$args);

sleep(2);

}

}else{

echo “function is not exists”;

}

exit();

}

}

}

function worker($args){

//do something

}

daemon(‘worker’,array(1),2);