What are common methods for implementing a time-based restriction in PHP applications?

One common method for implementing a time-based restriction in PHP applications is to compare the current time with a specific time range and allow or deny access based on the comparison. This can be useful for restricting access to certain features or content during specific times of the day.

$current_time = time();
$start_time = strtotime('09:00:00');
$end_time = strtotime('17:00:00');

if ($current_time >= $start_time && $current_time <= $end_time) {
    // Allow access
    echo "Access allowed during business hours.";
} else {
    // Deny access
    echo "Access denied outside of business hours.";
}