Get values from Json code

Get values from Json code

This is my Json code
[{"ProspectID":"87f3278e-c9ee-4775-abc6-4813969d45a5",
"FirstName":"erter","LastName":nurtertel,
"EmailAddress":null,"Company":null,
"Phone":null,"Mobile":"456456456",
"Total":"690"},
{"ProspectID":"00969dcd-5c03-450e-832c-063e976285d5",
"FirstName":"rter","LastName":"erte",
"EmailAddress":null,"Company":"null",
"Phone":"56456456","Mobile":null,"Total":"690"}
]
In this code i need to get that prospectID.how to get that prospectID in
array php code?