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);