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 positive integer.
- nanoseconds
-
Must be a positive integer less than 1 billion.
返回值
如果成功则返回 TRUE，失败则返回 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
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.\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 milliseconds.\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.";
}
?>
注释
Note: 本函数未在 Windows 平台下实现。
