time_nanosleep

(PHP 5, PHP 7)

Delay for a number of seconds and nanoseconds

mixed time_nanosleep ( int $seconds, int $nanoseconds )

Delays program execution for the given number of seconds and nanoseconds.

Parameters:

seconds

Must be a non-negative integer.

nanoseconds

Must be a non-negative integer less than 1 billion.

Returns:

Returns TRUE on success or FALSE on failure.

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

Changelog:

5.3.0

This function is now available on Windows platforms.

Examples:

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.";
}
?>