Swift - PHP develops ios interface. Please give me some advice.

For example, if I provide a registration interface to ios developers, for example, if the registration is successful, then I want to return a status code to him. Should the original method be used to return the data?
`public function login(){

<code>$name=$_POST['name'];
$password=$_POST['password'];
if(){
    return "成功";
}else{
    return "失败";
}</code>

}`

Reply content:

For example, if I provide a registration interface to ios developers, for example, if the registration is successful, then I want to return a status code to him. Should the original method be used to return the data?
`public function login(){

<code>$name=$_POST['name'];
$password=$_POST['password'];
if(){
    return "成功";
}else{
    return "失败";
}</code>

}`

Return to json format

echo json_encode("success")

$data['code']='1';
$data['msg']="Login successful!";
exit(json_encode($data));

<code>json_encode(['status' => 1, 'message' => '成功']);</code>

Client does json parsing