php sleep函数用法

* sleep 浏览器上访问

<?php
header('Content-Type: text/html; charset:utf-8');

ignore_user_abort();
set_time_limit(3000);

$interval = 1;
$i = 0;

do {
    echo "written at ".date('Y-m-d H:i:s', time()).'<br />';
    sleep($interval);
    $i++;
    ob_flush();
} while($i < 10);

* run:

php -S 0.0.0.0:8085