time_nanosleep

(PHP 5)

time_nanosleep — Delay for a number of seconds and nanoseconds

Description

mixed time_nanosleep ( int $seconds , int $nanoseconds )

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

Parameters

seconds

Must be a positive integer.

nanoseconds

Must be a positive integer less than 1 billion.

Return Values

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

Examples

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.";
}
?>

Notes

Note: This function is not implemented on Windows platforms.

See Also

sleep(), usleep(), set_time_limit()