将JSON字符串转换为JSON数组

Question

I have a CSV file like this

first_name,last_name,phone
Joseph,Dean,2025550194
Elbert,Valdez,2025550148

Using this csv-to-json.php from GitHub I get output like this

[{
    "first_name": "Joseph",
    "last_name": "Dean",
    "phone": "2025550194",
    "id": 0
}, {
    "first_name": "Elbert",
    "last_name": "Valdez",
    "phone": "2025550148",
    "id": 1
}]

This is almost what I want - however instead of

"phone": "2025550194"

I need

"phone": [{
    "type": "phone",
    "number": "2025550194"
}]

How do I correct this?