Update array parameter

[dynamiccookies]

Currently, when passing an array into the decodeVIN() function, the splat operator must be used (...$keys).

Need to find a way to expand this process so that the splat operator isn't required but can still be used.

The function should be able to accept the following options as a secondary parameter:

• Blank/empty
• Single string
• Multiple strings as multiple parameters
• Single array with splat operator
• Single array without splat operator
• Multiple string, array, or mixture of string & array parameters