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usleep

Description

The usleep of Miscellaneous for PHP delays execution in microseconds.

Syntax

usleep(
    int $microseconds
): void

Parameters

microseconds

Halt time in microseconds. A microsecond is one millionth of a second.

NOTE: On Windows, the system may sleep longer that the given number of microseconds, depending on the hardware.

Return

No value is returned.

Examples

1 · microseconds

<?

echo date("H:i:s.v"), PHP_EOL;

$microseconds = 1000000;

usleep($microseconds);

echo date("H:i:s.v");

04:48:50.000
04:48:51.000

2 · microseconds

<?

echo (new DateTime("now"))->format("H:i:s.v"), PHP_EOL;

$microseconds = 1000;

usleep($microseconds);

echo (new DateTime("now"))->format("H:i:s.v"), PHP_EOL;

04:48:51.592
04:48:51.593