How can PHP interact with system time to calculate time differentials accurately?

To accurately calculate time differentials in PHP, we can use the built-in functions like `time()` to get the current system time and `strtotime()` to convert date/time strings into timestamps. By manipulating these timestamps, we can accurately calculate time differences between two points in time. 

// Get the current system time
$current_time = time();

// Convert date/time strings to timestamps
$start_time = strtotime('2022-01-01 12:00:00');
$end_time = strtotime('2022-01-01 14:30:00');

// Calculate the time differential
$time_diff = $end_time - $start_time;

// Convert the time differential to hours
$hours = floor($time_diff / 3600);

echo "Time differential in hours: " . $hours;

Keywords

PHP system time time differentials date functions timezones

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