php本身对于多线程处理是不够理想的，但如果我们使用pthreads性能会有所提高了，下面来看一个php多线程pthreads使用例子
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declare(ticks = 1);
$running = 1;
//信号处理函数
function sig_handler($signo)
{
switch ($signo) {
case SIGINT:
finish();
break;
default:
break;
}
}
pcntl_signal(SIGINT, "sig_handler");
class test extends \Thread {
public $url;
public $result;
public function __construct($url) {
$this->url = $url;
}
public function run() {
if ($this->url) {
$this->result = model_http_curl_get($this->url);
}
}
}
function model_http_curl_get($url) {
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_TIMEOUT, 5);
curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2)');
$result = curl_exec($curl);
curl_close($curl);
return $result;
}
for ($i = 0; $i
$urls[] = 'http://www.baidu.com/s?wd='. rand(10000, 20000);
}
$pool = array();
for ($i=1;$i
$key = uniqid();
$url = array_shift($urls);
$pool[$key] = new test($url);
$pool[$key]->start();
echo "启动线程$key\n";
}
while ($urls && $running) {
foreach ($pool as $key=>$worker) {
if(! $worker->isRunning()){
//unset($pool[$key]);
echo "线程".$key."已结束\n";
$url = array_shift($urls);
$pool[$key] = new test($url);
$pool[$key]->start();
echo "启动线程$key\n";
}
}
usleep(1000);
}
function finish() {
global $running;
global $pool;
$running = 0;
echo "接收到信号，等待运行中线程结束\n";
foreach ($pool as $key=>$worker) {
if ($pool[$key]->join()) {
var_dump($pool[$key]->result);
}
}
}
