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usleep

Name

usleep — Delays program execution.

Synopsis

void usleep(microseconds); integer microseconds: Number of microseconds to sleep

Returns

Nothing

Description

usleep() is used to delay the execution of the current program. The delay lasts for the number of microseconds specified in the microseconds argument and begins at the point in the script where the usleep() function call is made.

Note

usleep() does not work on some operating systems (notably most Windows family operating systems).

Version

PHP Version: 3+, 4+

Example

Example 762. Use usleep() to reduce the effectiveness of lottery-style password attacks

<?php
# Sleep for 1/2 second
microsleep (500);

# Attempt to authenticate user data
# ...
?>

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