time_nanosleep
(PHP 5)
time_nanosleep — Delay for a number of seconds and nanoseconds
说明
mixed time_nanosleep ( int $seconds , int $nanoseconds )Delays program execution for the given number of seconds and nanoseconds.
参数
- seconds
-
Must be a non-negative integer.
- nanoseconds
-
Must be a non-negative integer less than 1 billion.
返回值
成功时返回 TRUE， 或者在失败时返回 FALSE.
If the delay was interrupted by a signal, an associative array will be returned with the components:
- seconds - number of seconds remaining in the delay
- nanoseconds - number of nanoseconds remaining in the delay
更新日志
| 版本 | 说明 |
|---|---|
| 5.3.0 | This function is now available on Windows platforms. |
范例
Example #1 time_nanosleep() example
<?php
// Careful! This won't work as expected if an array is returned
if (time_nanosleep(0, 500000000)) {
echo "Slept for half a second.
";
}
// This is better:
if (time_nanosleep(0, 500000000) === true) {
echo "Slept for half a second.
";
}
// And this is the best:
$nano = time_nanosleep(2, 100000);
if ($nano === true) {
echo "Slept for 2 seconds, 100 microseconds.
";
} elseif ($nano === false) {
echo "Sleeping failed.
";
} elseif (is_array($nano)) {
$seconds = $nano['seconds'];
$nanoseconds = $nano['nanoseconds'];
echo "Interrupted by a signal.
";
echo "Time remaining: $seconds seconds, $nanoseconds nanoseconds.";
}
?>
参见
- sleep() - Delay execution
- usleep() - Delay execution in microseconds
- time_sleep_until() - Make the script sleep until the specified time
- set_time_limit() - 设置脚本最大执行时间
