php - Need Json in the given form -

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i want json in given form web sercie:

        "header":{         "code":"0",         "message":"success"     },     "body":{         "questions":{             "1":"who microsoft ceo",             "2":"oop stands for?"         },         "answers":[         "question 1":[             "bill gates",             "nelson mandela",             "nsteve jobs",             "robert andrew",]          "question 2":[             "object oriented program",             "object oriented programing",             "object oriented proffesion",             "object oriented prefix"         ]     }  }

i getting 

    "header":{         "code":"0",         "message":"success"     },     "body":{         "questions":{             "1":"who microsoft ceo",             "2":"oop stands for?"         },         "answers":[             "bill gates",             "nelson mandela",             "nsteve jobs",             "robert andrew",             "object oriented program",             "object oriented programing",             "object oriented proffesion",             "object oriented prefix"         ]     }  }

the code "questionandanswer.php" ,every thing runs fine need code nessted loop part got required json

<?php /**  * created phpstorm.  * user: user  * date: 6/9/14  * time: 3:47 pm  */  require('../lib.php');   global $db;  $json = array(); $json['header']['code'] = '0'; $json['header']['message'] = 'success'; $json['body'] = '';  $query_1 = "select * `questions`"; $getnumofrows = $db->executequery($query_1);  $res_id = $getnumofrows->reshandle; $numberofrows = mysql_num_rows($res_id);  $count_ques = 0; $count_ans = 0; while ($getnumofrows_fromdb = $getnumofrows->fetchasarray()) {     $question = $getnumofrows_fromdb['question_descrip'];      $json['body']['questions'][$getnumofrows_fromdb['id']] = $question;      $query_ans = "select * `answers` question_id=".$getnumofrows_fromdb['id'].";";      $getnumofrows_ans = $db->executequery($query_ans);      while ($getnumofrows_fromdb_ans = $getnumofrows_ans->fetchasarray()) {          $answers[$count_ans] = $getnumofrows_fromdb_ans['answer_opt'];         //$ques_id= $getnumofrows_fromdb_ans['answer_opt'];         $json['body']['answers'] = $answers;          $count_ans++;     }     $count_ques++; }  echo json_encode($json); ?>

please tell me code can desire json. thanx


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