2018年swoole实战7-进程详解创建子进程调用外部程序查看进程树多进程的实战案例

<?php
$process = new swoole_process(function(swoole_process $pro) {
    echo 'swoole创建进程' . PHP_EOL;
}, false); // 如果设置为true，终端就不会显示标准输出内容

$pid = $process->start(); // 创建了一个子进程
echo $pid . PHP_EOL; // 子进程id

swoole_process::wait();

☁  process  php process.php
67540
swoole创建进程

<?php
$process = new swoole_process(function(swoole_process $pro) {
    $pro->exec("/usr/local/opt/php@7.1/bin/php", [__DIR__.'/http_server.php']);
}, false); // 如果设置为true，终端就不会显示标准输出内容

$pid = $process->start(); // 创建了一个子进程
echo $pid . PHP_EOL; // 子进程id

swoole_process::wait();

<?php
$http = new swoole_http_server('0.0.0.0', 9502);

$http->on('request', function ($request, $response) {
    $response->header("Content-Type", "text/html; charset=utf-8");
    $time = date('Y-m-d H:i:s', time());
    $response->end("<h1>{$time}--这是swoole提供的http服务，修改代码后要重启服务才能生效</h1>");
});

$http->start();

☁  process  php process.php
68526
[2018-07-27 16:38:53 @68526.0]  TRACE   Create swoole_server host=0.0.0.0, port=9502, mode=3, type=1

brew install pstree # mac 安装 pstree
ps aux | grep process.php  # 获取进程id
pstree -p 69932 # 显示进程树

<?php
$startTime = time();
echo "程序开始执行时间：" . date("H:i:s") . PHP_EOL;
$workers = [];
$urls = [
    'http://www.zhihu.com',
    'http://www.baidu.com',
    'http://www.jianshu.com',
    'http://www.huxiu.com',
    'http://www.qq.com',
];

for ($i = 0; $i < count($urls); $i++) {
    // 每次开启一个子进程
    $process = new swoole_process(function (swoole_process $worker) use($i, $urls) {
        $content = getContent($urls[$i]);
        $worker->write($content . PHP_EOL);
    }, true);
    $pid = $process->start();
    $workers[$pid] = $process;
}

foreach ($workers as $process) {
    echo $process->read();
}

// 模拟获取数据, 耗时1秒
function getContent($url) {
    sleep(1);
    return $url . " 执行完成..." . PHP_EOL;
}
$runTime = time() - $startTime;
echo "程序执行时间为{$runTime}秒" . PHP_EOL;

☁  process  php process_curl.php
程序开始执行时间：17:13:54
http://www.zhihu.com 执行完成...

http://www.baidu.com 执行完成...

http://www.jianshu.com 执行完成...

http://www.huxiu.com 执行完成...

http://www.qq.com 执行完成...

程序执行时间为1秒