(PHP 5 >= 5.1.0, PHP 7, PHP 8)
time_sleep_until — Make the script sleep until the specified time
$timestamp): bool
Makes the script sleep until the specified
timestamp.
timestampThe timestamp when the script should wake.
Returns true on success or false on failure.
If the specified timestamp is in the past, this
function will generate a E_WARNING.
Example #1 A time_sleep_until() example
<?php
//returns false and generates a warning
var_dump(time_sleep_until(time()-1));
// may only work on faster computers, will sleep up to 0.2 seconds
var_dump(time_sleep_until(microtime(true)+0.2));
?>
Note: All signals will be delivered after the script wakes up.