$.ajax()function with json data from javascript array to a php processing file -

i trying use json first time $.ajax() got values of checkboxes , other needed data php file processing , posting mysqldb through array data section of $.ajax() function empty array[] on php file. when try using javascript debugging tool browser got reprot

**uncaught syntaxerror: unexpected end of input jquery-1.9.0.min.js:1 st.extend.parsejson jquery-1.9.0.min.js:1 (anonymous function) index.php?url=account/registration/:297 st.event.dispatch jquery-1.9.0.min.js:2 y.handle**  

the array produced looks @ console log

 [checkbox1: "com 101", semester: "1st semester", mid: "7", checkbox2: "com 112", checkbox3: "sta 111"…]  checkbox1: "com 101" checkbox2: "com 112" checkbox3: "sta 111" checkbox4: "sta 112" checkbox5: "mth 111" length: 0 mid: "7" semester: "1st semester" 

on php processing file did print_r on json data got array[] result

this javascript code block "mydataarray global variable"

$('#mytable2').on('change',function(e){             var rel = e.target.getattribute('rel');             console.log(e.target.value+ " "+ e.target.checked)             if(rel === globals.payment_target && e.target.checked===true){                 mydataarray[e.target.getattribute("name")]= e.target.value;                 mydataarray["semester"] = $("#semester").val()                 mydataarray["mid"] = $("#mid").val()              }              if(rel === globals.payment_target && e.target.checked ===false){                 delete mydataarray[e.target.getattribute("name")]                 console.log(mydataarray)             }  }); $('#mytable2').on('click',function(e){             var rel = e.target.getattribute('rel');             console.log(e.target.value+ " "+ e.target.getattribute('name'))             if(rel === globals.payment_target && e.target.value =="register"){                console.log(mydataarray)                 var jsonstring = $.parsejson(mydataarray);                 var myglob    =json.stringify(globals)                 console.log(myglob)                 $.ajax({url:'courseregistration.php',  type:'post',data:{data:jsonstring},success: function(result){                         $('#putmehere').html("<h4 style='text-align:center'>"+result+"</h4>")                         alert(result)                      }                 })              }          }); 

and php file looks like

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

i can't figure out problem is. can please tell me wrong way i'm doing or suggest better way

try set data type property json

 $.ajax({     url:'courseregistration.php',     type:'post',data:{data:jsonstring},     datatype:"json",     success: function(result){     $('#putmehere').html("<h4 style='text-align:center'>"+result+"</h4>")     alert(result)      }   }); 

also set content type in php script.

header('content-type: application/json');