What potential pitfalls should PHP developers be aware of when attempting to achieve precise time delays using standard PHP implementations?

One potential pitfall when attempting to achieve precise time delays in PHP is the reliance on functions like sleep() or usleep(), which may not provide accurate delays due to the script execution time and server load. To achieve more precise time delays, developers can use the time_nanosleep() function, which allows for delays in nanoseconds.

// Use time_nanosleep() for more precise time delays
$delay = [0, 500000000]; // 0.5 seconds
time_nanosleep(...$delay);