PHP: Convert 24 Hour Time to 12 Hour Time (and Vice Versa)

If you want to convert a time in 24 hour format, such as 14:00, to 12 hour format, which would be 2PM, you can use the following code.

24 Hour to 12 Hour:
<?php echo date("g:i a", strtotime("13:30")); ?>

Additionally, if you wanted to convert the 12 hour time format to 24 hour, you can use the next bit of code.

12 Hour to 24 Hour:
<?php echo date("H:i", strtotime("1:30 PM")); ?>