[11.x] Add pan format for String helper

[alexanderkroneis]

This PR introduces another helper function on Str and Stringable. It formats a given string into a PAN.

PAN is a Primary Account Number which is used for credit card numbers and IBANs.

Str::pan('AT866000031866916134') // AT86 6000 0318 6691 6134

str('AT866000031866916134')->pan() // AT86 6000 0318 6691 6134

[Jubeki]

I would love to the following values also being correctly transformed into sets of 4 symbols, so that even with spaces, the correct result is given:

AT8 660 000 318 669 161 34
AT86 6000 0318 6691 6134

I normally used the following code for that:

trim(chunk_split(
    str_replace(' ', '', $value),
    4,
    ' '
))

[alexanderkroneis]

I would love to the following values also being correctly transformed into sets of 4 symbols, so that even with spaces, the correct result is given:

AT8 660 000 318 669 161 34
AT86 6000 0318 6691 6134

I normally used the following code for that:

trim(chunk_split(
    str_replace(' ', '', $value),
    4,
    ' '
))

Thanks, that a great input!

[taylorotwell]

I think you could macro this into your project if needed. 👍