不使用$ .ajax调用发送到php页面的字符串数据

Question

当我使用函数参数传递数字以使用ajax发送时它正常工作但是当我传递字符串如下面给出的它没有在php页面中接收时。

function loadState(country) {
  $.ajax({
    url: 'cardstate.php',
    type: 'get',
    data: { 'country': country },
    dataType: 'json',
    contentType: 'application/json; charset=utf-8',
    success: function(data) {
      alert(data);
    }
  });
}

loadState("Pakistan")

// cardstate.php:
$country = $_GET['country'];
echo $country; // not receving string while when i put number its receiving

Answer 1

在你的cardstate.php中你应该使用json_encode

// cardstate.php:
$country = $_GET['country'];
echo json_encode($country); // not receving string while when i put number its receiving

Answer 2

function loadState(country) {
  $.ajax({
    url: 'cardstate.php',
    type: 'GET',
    data: 'country='+country, // <--- changed this as its GET
    dataType: 'json',
    contentType: 'application/json; charset=utf-8',
    success: function(data) {
      alert(data.country); // <---- made this change
    }
  });
}

loadState("Pakistan")

在PHP中，使用json_encode()

// cardstate.php:
$country = $_GET['country'];
echo json_encode(array('country' => $country));