Submitting JSON data via JQuery ajax.post to PHP -

im submitting data php file via ajax using post. worked fine submitting strings, wanted submit js object json , decode on php side.

in console can see, data submitted correctly on php side json_decode returns null.

i've tried following:

this.getabsence = function() {     alert(json.stringify(this));     jquery.ajax({         type: "post",         contenttype: "application/json; charset=utf-8",         url: "ajax/selectsingle.php?m=getabsence",         data: json.stringify(this),         success : function(data){             alert(data);         }     }); } 

php:

echo $_post['data']; echo json_decode($_post['data']); echo var_dump(json_decode($_post['data'])); 

and:

this.getabsence = function() {     alert(json.stringify(this));     jquery.ajax({         type: "post",         contenttype: "application/json; charset=utf-8",         url: "ajax/selectsingle.php?m=getabsence",         data: {'absence' : json.stringify(this)},         success : function(data){             alert(data);         }     }); } 

php:

echo $_post['absence']; echo json_decode($_post['absence']); echo var_dump(json_decode($_post['absence'])); 

the alert check alright...

and yea usual string echoed correctly :-)

where went wrong in code in first code must have used this:

var_dump(json_decode(file_get_contents("php://input"))); //and not $_post['data'] 

quoting php manual

php://input read-only stream allows read raw data request body.

since in case, submitting json in body, have read stream. usual method of $_post['field_name'] wont work, because post body not in urlencoded format.

in second part, must have used this:

contenttype: "application/json; charset=utf-8", url: "ajax/selectsingle.php?m=getabsence", data: json.stringify({'absence' : json.stringify(this)}), 

update:

when request has content type application/json, php wont parse request , give json object in $_post, must parse raw http body. json string retrieved using file_get_contents("php://input");.

if must using $_postyou make it:

data: {"data":json.stringify({'absence' : json.stringify(this)})}, 

and in php do:

$json = json_decode($_post['data']);