从PHP页面上的jQuery AJAX调用获取JSON数据

Question

I would like to send data using the jQuery Ajax API:

var myData = {"param1" : $('#txtParam1').val(), "param2" : $('#txtParam2').val()};

$.ajax({
    url: 'DataService.php?action=SomeAction',
    type: 'POST',
    data: myData,
    dataType: 'json',
    contentType: "application/json; charset=utf-8",
    success: function(result) {
    alert(result.Result);}
});

When I tried to retrieve this data with PHP using

    $param1 = $_REQUEST['param1'];

$param1 is showing null and print_r($_REQUEST) is only showing action = SomeAction ..

How do I retrieve the posted data on a PHP page?

Answer 1

since you're sending the ajax as "contentType: 'application/json'", you need to fetch the request body with php://input like so:

$request = file_get_contents("php://input"); // gets the raw data
$params = json_decode($request,true); // true for return as array
print_r($params);

Answer 2

Try this:

$params = json_decode( $_POST['param1']);

And then check what you have got:

var_export( $params);

Or you can use a foreach loop:

foreach( $params as $param)
{
    echo $param . '<br />';
}

You are using POST, method, dont use REQUEST because it is also less secure.

Answer 3

尝试使用

$param1 = $_POST['param1'];