PHP 7.3 was touted as faster (9% on average) than PHP 7.2 and most compatible with the latest versions of popular CMSs like WordPress. PHP updates are automatic and unnoticeable in most cases.
Below are some of the cool new features of PHP 7.3:
🐘 Array_key_first => Allows for selection of first key in an array
🐘 Array_key_last => Allows for selection of last key in an array
🐘 Passing by reference with list language constructs
🐘 is_countable => Helps to check variables to determine if they are countable