我如何使用php中的post方法从json数组获取响应

Question

I am facing error while getting response from JSON array. here is PHP code I try this code.

var_dump($_POST);die;

empty

$data = (array) json_decode($HTTP_RAW_POST_DATA, true);
var_dump($data);

empty

$arJson =(array) json_decode( $_POST, true );
var_dump($arJson); 

this one also empty here is postman results.

Answer 1

If your whole POST body contains the JSON, you can get it using thid piece of code:

$json = file_get_contents('php://input');
$decoded = json_decode($json);

Answer 2

Try this: $postData = json_decode(file_get_contents("php://input"));

If you simply POST a good old HTML form, the request looks something like this:

POST /page.php HTTP/1.1

key1=value1&key2=value2&key3=value3

But if you are working with Ajax a lot, this probaby also includes exchanging more complex data with types (string, int, bool) and structures (arrays, objects), so in most cases JSON is the best choice. But a request with a JSON-payload would look something like this:

POST /page.php HTTP/1.1

{"key1":"value1","key2":"value2","key3":"value3"}

The content would now be application/json (or at least none of the above mentioned), so PHP's $_POST-wrapper doesn't know how to handle that (yet).

The data is still there, you just can't access it through the wrapper. So you need to fetch it yourself in raw format with file_get_contents('php://input') (as long as it's not multipart/form-data-encoded ).

Answer 3

You can get value like this:

$str = file_get_content("php://input");
$data = json_decode($str,true);

Hope you can help.