Are there any specific PHP functions or libraries that can simplify the conversion of SQL datetime to the required UTC format for Highcharts?

When working with Highcharts, it's important to ensure that your datetime values are in UTC format to display the data accurately. One way to achieve this is by converting your SQL datetime values to UTC format using PHP functions like `strtotime()` and `date()`. By converting the datetime values to UTC format before passing them to Highcharts, you can ensure that the data is displayed correctly across different time zones.

// Assuming $sqlDatetime contains the SQL datetime value
$utcDatetime = date('Y-m-d H:i:s', strtotime($sqlDatetime . ' UTC'));