POSTed JSON from Android can't decode in PHP

Question

i POST a JSON-String from an Android Application to a Webserver. There i want to decode the String into JSON and save the data into a database. But here is the Problem.

I read out the POST-Variable:

$json = $_POST['json'];

This brings me:

{"user":"Bob"}

Then i decode the json:

$decoded = json_decode($json, true);

There i get NULL!

BUT, when i create a String in PHP like:

$json = '{"user":"Bob"}';

and decode, it works?! But why? Where is the difference? Hope everyone can help me! :-/

Thanks a lot!

Thomas

Answer 1

您可能会以字符串形式发送json数据，只是发送它，因为在传递json数据时不要使用(')或(")倒置逗号。