原生php实现登录接口（+测试数据）(不加任何封装)

<?php
$link=mysqli_connect('localhost','root','','a');
//然后是指定php链接数据库的字符集
mysqli_set_charset($link,'utf8');
if(empty($_POST['phone']))
{
  return "请输入手机号";
}
if(empty($_POST['pwd']))
{
  return "请输入密码";
}
$sql="select * from php_user  where status=1 and phone=".$_POST['phone']."limit 0,1";
$result=mysqli_query($link,$sql);//运行sql
if(mysqli_num_rows($result) > 0){
  while($row = mysqli_fetch_assoc($result)) {
    $data[] = $row;
    }
    $json = json_encode(array(
            "resultCode"=>200,
            "message"=>"查询成功！",
            "data"=>$data
        ),JSON_UNESCAPED_UNICODE);
        //转换成字符串JSON
        echo($json);
}else{
     $json = json_encode(array(
            "resultCode"=>200,
            "message"=>"暂无数据",
            "data"=>''
        ),JSON_UNESCAPED_UNICODE);
        //转换成字符串JSON
        echo($json);
}