How to parse json array foreach?

Question

PHP

Probably the most simple array)
I get an array of users using the post method

"data": [
        {
            "name": "Ivan",
            "telephone": "1111",
            "id": "1"
        },
        {
            "name": "Ivan2",
            "telephone": "2222",
            "id": "2"
        },
        {
            "name": "Ivan3",
            "telephone": "123445453333",
            "id": "3"
        }
    ]

I need to add to the database of each user trying to parse foreach

foreach($post['data'] as $contact) {

}

As I understand it, I get only one entry from the array. What am I doing wrong?
Thank you all in advance.