How to read these strange data retrieved from WP REst Api?

I’m looking for a suggestion on how to manage these data that I get, in a Ionic4 app, from a Wordpress site, calling the WP Rest API.

The web services return a JSON like this:

"id": 230,
"title": "Tuscany rentals",
"address_transport": [
"a:3:{s:7:\"address\";s:65:\"Piazzale Michelangelo, Piazzale Michelangelo, Firenze, FI, Italia\";s:8:\"latitude\";s:10:\"43.7629314\";s:9:\"longitude\";s:18:\"11.265056100000038\";}"

The problem is the field “address_transport” that has a strange format, that I don’t know how to read.

I’ve understood that that the address_transport item is an array of three elements (a:3), the first is “address” that is log 7 characters (s:7) and its value is “Piazzale Michelangelo, Piazzale Michelangelo, Firenze, FI, Italia” that has 65 characters (s:65).

Do you have any suggestions on how to read data like these and what is the name of this strange notation?

Thank you very much


I’ve found that this is an array serialized with the PHP function serialize.
There is also an unserialize function.
There is also a Javascript library to unserialize these arrays.
I’ve solved, unserializing the string on the server.