(PHP 5, PHP 7)
time_nanosleep — 延缓执行若干秒和纳秒
seconds必须是一个非负整数。
nanoseconds必须是一个小于1亿的非负整数。
成功时返回 TRUE， 或者在失败时返回 FALSE。
如果延迟被中断，一个关联数组会返回，内容为：
| 版本 | 说明 |
|---|---|
| 5.3.0 | 至此之后该函数在Windows平台下可用。 |
Example #1 time_nanosleep() 的例子
<?php
// Careful! This won't work as expected if an array is returned
if (time_nanosleep(0, 500000000)) {
echo "Slept for half a second.\n";
}
// This is better:
if (time_nanosleep(0, 500000000) === true) {
echo "Slept for half a second.\n";
}
// And this is the best:
$nano = time_nanosleep(2, 100000);
if ($nano === true) {
echo "Slept for 2 seconds, 100 microseconds.\n";
} elseif ($nano === false) {
echo "Sleeping failed.\n";
} elseif (is_array($nano)) {
$seconds = $nano['seconds'];
$nanoseconds = $nano['nanoseconds'];
echo "Interrupted by a signal.\n";
echo "Time remaining: $seconds seconds, $nanoseconds nanoseconds.";
}
?>