sending JSON to PHP using jquery ajax

Question

I'm sending a fairly simple compilation of object to a php script using the jQuery's .ajax. I want to extract one value from each object in the PHP script. The javascript is:

var obj = [{id:1, name:"val1"}, {id:2, name:"val2"},{id:3, name:"val3"}];
$.ajax({
 type: "GET",
 url: "call.php",
 contentType: "application/json",
 data: {type: "stream", q: JSON.stringify(obj)},
 success: function(response){
 alert(response);
 }
 });

The call.php file is written as:

if($_GET['type']=='stream'){
 $obj = json_decode($_GET['q']);
 for($i=0;$obj[$i];$i++){
 echo $obj[$i]->{'name'}." ";
 }
}

However this returns 0, and I simply cannot figure out why.

Secondly a attempted using type:"POST" in the javascript, and $_POST in php, but that failed altogether.

• cHao: Have you tried var_dumping $_GET in your call.php script to see what jQuery and PHP have done with your data?

Answer 1

 data: {type: "stream", q: JSON.stringify(obj)},

instead of this use

 data: {type: "stream", q: obj},

Answer 2

You are missing dataType: 'json' in your ajax options. contentType option is for data being sent only.

After adding dataType, try this:

echo $_GET['q'];

It should simply return the json string you send. If not need to look at request in console for problems

• thecodeparadox: hi mate, dataType is not related to send data, but for format of receive data you expecting.