本篇文章给大家分享的内容是关于php实现多线程代码，有着一定的参考价值，有需要的朋友可以参考一下
php本身是不支持多线程的,我们可以通过php自身函数虚拟处理啊多线程。下面介绍三个函数来实现多进程。
一、fsockopen，打开一个网络连接或者一个Unix套接字连接。其中stream_set_blocking() - 为资源流设置阻塞或者阻塞模式
* @title: PHP多线程类(Thread)
* @version: 1.0
*
* PHP多线程应用示例：
* require_once 'thread.class.php';
* $thread = new thread();
* $thread->addthread('action_log','a');
* $thread->addthread('action_log','b');
* $thread->addthread('action_log','c');
* $thread->runthread();
*
* function action_log($info) {
* $log = 'log/' . microtime() . '.log';
* $txt = $info . "rnrn" . 'Set in ' . Date('h:i:s', time()) . (double)microtime() . "rn";
* $fp = fopen($log, 'w');
* fwrite($fp, $txt);
* fclose($fp);
* }
*/
class thread {
var $hooks = array();
var $args = array();
function thread() {
}
function addthread($func)
{
$args = array_slice(func_get_args(), 1);
$this->hooks[] = $func;
$this->args[] = $args;
return true;
}
function runthread()
{
if(isset($_GET['flag']))
{
$flag = intval($_GET['flag']);
}
if($flag || $flag === 0)
{
call_user_func_array($this->hooks[$flag], $this->args[$flag]);
}
else
{
for($i = 0, $size = count($this->hooks); $i < $size; $i++)
{
$fp=fsockopen($_SERVER['HTTP_HOST'],$_SERVER['SERVER_PORT']);
stream_set_blocking($fp,0);
if($fp)
{
$out = "GET {$_SERVER['PHP_SELF']}?flag=$i HTTP/1.1rn";
$out .= "Host: {$_SERVER['HTTP_HOST']}rn";
$out .= "Connection: Closernrn";
fputs($fp,$out);
fclose($fp);
}
}
}
}
}二、stream_socket_client，PHP5中可以使用新增的stream_socket_client()函数直接替换掉fsocketopen()。其中stream_set_blocking() - 为资源流设置阻塞或者阻塞模式
<?php
$fp = stream_socket_client("tcp://www.example.com:80", $errno, $errstr, 30);
stream_set_blocking($fp,0);
if (!$fp) {
echo "$errstr ($errno)<br />\n";
} else {
fwrite($fp, "GET / HTTP/1.0\r\nHost: www.example.com\r\nAccept: */*\r\n\r\n");
while (!feof($fp)) {
echo fgets($fp, 1024);
}
fclose($fp);
}
?>
三、curl_multi，当需要多线程的时候，可以用curl_multi一次性请求多个操作来完成，但curl走的是网络通信，效率与可靠性就比较差了的。
function sendMulitRequest($send_data){
$params = array();
$curl = $text = array();
$handle = curl_multi_init();
foreach ($data as $k => $v) {
if (empty($v['url'])) {
$v['url'] = "http://www.xxx.com"; //if url is empty,set defalut url
}
$reqBody = json_encode($v['body']);
$reqStream = array(
'body' => $reqBody,
);
$encRequest = base64_encode(json_encode($reqStream));
$params['data'] = $encRequest;
$curl[$k] = curl_init();
curl_setopt($curl[$k], CURLOPT_URL, $v['url']);
curl_setopt($curl[$k], CURLOPT_POST, TRUE);
curl_setopt($curl[$k], CURLOPT_HEADER, 0);
curl_setopt($curl[$k], CURLOPT_POSTFIELDS, http_build_query($params));
curl_setopt($curl[$k], CURLOPT_RETURNTRANSFER, 1);
curl_multi_add_handle($handle, $curl[$k]);
}
$active = null;
do {
$mrc = curl_multi_exec($handle, $active);
} while ($mrc == CURLM_CALL_MULTI_PERFORM);
while ($active && $mrc == CURLM_OK) {
if (curl_multi_select($handle) != -1) {
do {
$mrc = curl_multi_exec($handle, $active);
} while ($mrc == CURLM_CALL_MULTI_PERFORM);
}
}
foreach ($curl as $k => $v) {
if (curl_error($curl[$k]) == "") {
$text[$k] = (string) curl_multi_getcontent($curl[$k]);
}
curl_multi_remove_handle($handle, $curl[$k]);
curl_close($curl[$k]);
}
curl_multi_close($handle);
return $text;
}相关推荐：
立即学习“PHP免费学习笔记（深入）”；
