PHPで同時実行性を実装する方法

function request(){
$srart_time = microtime(TRUE);
$webSiteUrl = 'http://test/';
/**
 * 结算
 */
$alls = [
    $webSiteUrl . "1.php",
    $webSiteUrl . "2.php",
];
//1 创建批处理cURL句柄
$chHandle = curl_multi_init();
$chArr = [];
//2.创建多个cURL资源
foreach ($alls as $Url) {
    $chArr[$Url] = curl_init();
    curl_setopt($chArr[$Url], CURLOPT_URL, $Url);
    curl_setopt($chArr[$Url], CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($chArr[$Url], CURLOPT_TIMEOUT, 1);
    curl_multi_add_handle($chHandle, $chArr[$Url]); //2 增加句柄
}
$active = null;
/**常量
 * CURLM_CALL_MULTI_PERFORM==-1
 * // CURLM_OK == 0
 **/
do {
    $mrc = curl_multi_exec($chHandle, $active); //3 执行批处理句柄
} while ($mrc == CURLM_CALL_MULTI_PERFORM); //4
//4 $active 为true，即$chHandle批处理之中还有$ch句柄正待处理，$mrc==CURLM_OK,即上一次$ch句柄的读取或写入已经执行完毕。
while ($active && $mrc == CURLM_OK) {
    if (curl_multi_select($chHandle) != CURLM_CALL_MULTI_PERFORM) {//$chHandle批处理中还有可执行的$ch句柄，curl_multi_select($chHandle) != -1程序退出阻塞状态。
        do {
            $mrc = curl_multi_exec($chHandle, $active);//继续执行需要处理的$ch句柄。
        } while ($mrc == CURLM_CALL_MULTI_PERFORM);
    }
}
foreach ($chArr as $k => $ch) {
//    $result[$k] = curl_multi_getcontent($ch); //5 获取句柄的返回值,不需要
    curl_multi_remove_handle($chHandle, $ch);//6 将$chHandle中的句柄移除
}
curl_multi_close($chHandle); //7 关闭全部句柄
$end_time = microtime(TRUE);
echo sprintf("use time:%.3f s", $end_time - $srart_time);
}

// 无时间限制执行此程序
set_time_limit(0);
// 设置默认时区  北京时间
date_default_timezone_set('PRC');
do {
    //  如果不存在 stop  文件，则程序停止 并且记录停止时间
    if (!file_exists(dirname(__FILE__) . '/stop')) {
        $handle = fopen('./ceshi.log', 'a+');
        fwrite($handle, '程序停止时间: ' . date('Y-m-d H:i:s') . "\n");
        fclose($handle);
        exit();
    }
    sleep(4);
    try {
        requestNewOpen();
    } catch (Exception $exception) {
        $handle = fopen('./ceshi.log', 'a+');
        fwrite($handle, 'catch : ' . $exception->getMessage() . "\n");
        fclose($handle);
    }
} while (true);