(PHP 5, PHP 7, PHP 8)
time_nanosleep — Delay for a number of seconds and nanoseconds
Delays program execution for the given number of
seconds
and nanoseconds
.
seconds
Must be a non-negative integer.
nanoseconds
Must be a non-negative integer less than 1 billion.
Nota: On Windows, the system may sleep longer that the given number of nanoseconds, depending on the hardware.
Restituisce true
in caso di successo, false
in caso di fallimento.
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
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 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.";
}
?>