What are the best practices for handling time calculations in PHP, especially when dealing with seconds and minutes?

When handling time calculations in PHP, especially when dealing with seconds and minutes, it is important to use built-in functions such as `strtotime`, `date`, and `strtotime`. These functions help in converting time formats, performing calculations, and formatting the output. It is also recommended to use the `DateTime` class for more advanced time manipulations.

// Example of calculating time difference in seconds
$start_time = strtotime('2022-01-01 10:00:00');
$end_time = strtotime('2022-01-01 10:05:30');
$time_diff = $end_time - $start_time;
echo "Time difference in seconds: " . $time_diff;

// Example of converting seconds to minutes
$seconds = 300;
$minutes = $seconds / 60;
echo "Seconds converted to minutes: " . $minutes;

// Example of formatting time
$timestamp = time();
$formatted_time = date('Y-m-d H:i:s', $timestamp);
echo "Formatted time: " . $formatted_time;