I am trying from react, using axios, to send a post request to a PHP file. The function that handles the button to submit the data is this:

    function handleAddPeople(event){
    const name = nameRef.current.value;
    const surname = surnameRef.current.value;
    const age = ageRef.current.value;

    axios({
        method: 'post',
        url: 'src/api/addPeople.php',
        data: {
          name: name,
          surname: surname,
          age: age
        }
    }).then(function(response){
        console.log(response);
    }).catch(function (error) {
        console.log(error);
    });  
    
}

And in the addPeople.php file i have this:

$con = mysqli_connect($host, $user, $password,$dbname);
$method = $_SERVER['REQUEST_METHOD'];
$request = explode('/', trim($_SERVER['PATH_INFO'],'/'));


if (!$con) {
  die("Connection failed: " . mysqli_connect_error());
}
    $_POST = json_decode(file_get_contents("php://input"),true);
    echo $_POST['name'];
    $name = $_POST["name"];
    $email = $_POST["surname"];
    $country = $_POST["age"];
    $sql = "insert into tabella1 (name, surname, age) values ('$name', '$surname', '$age')";
    $result = mysqli_query($con,$sql);
    if (!$result) {
        http_response_code(404);
        die(mysqli_error($con));
    } else {
        $con->close();
    }

From react i get no errors, meaning i have no syntax errors, but i get the error:

Cannot POST /src/api/addPeople.php

I have a second little problem. I've simplified as much as i can the .php file to find the error, but the first idea was to create a php class with some functions to handle the requests, i was thinking to have a URL like this "path/to/phpFile/functionName" in the axios post method, is it right?