jquery - Unable to use $.parseJSON on string variable constructed with array variable -

i'm able parse variable manually initialized json using jquery's '$.parsejson();' cannot parse variable identical json format constructed using array.

javascript

var questionstype = []; var questionshtml = []; var questionsquestion = []; //store questions, types, , html each fieldset 3 separate arrays for(var i=1;i<=formpreviewid;i++)   {  questionsquestion.push($("#formelement_"+i + " legend").text());  questionstype.push($("#formelement_"+i).attr("class"));  questionshtml.push($("#formelement_"+i)[0].outerhtml);   };   //alert(questionsquestion[1] + questionstype[1] + questionshtml[1]);    //format values each fieldset values format in mysql   var questionsvalues = [];   var index = 0;   for(var i=1;i<=formpreviewid;i++)   {    questionsvalues.push('{"question":"'+questionsquestion[index]+'","type":"'+questionstype[index]+'","html":"'+questionshtml[index]+'"}');   index++;   };   //alert(questionsvalues); //questionsvalues = questionsvalues.replace("}{", "},{"); //alert(questionsvalues);   //format mysql values json format  var questionsvaluesjson = '{"questions":['+questionsvalues+']}'; 

using manually constructed string variable identical json format --

 var questionsquestion2 = '{"questions":[{"question":"test16","type":"radio", "html":"<input>"},{"question":"test2","type":"checkbox", "html":"<input>"},{"question":"test3","type":"checkbox", "html":"<input>"}]}';  parsejson(questionsvaluesjson); //works fine 

using string constructed array --

 var questionsvaluesjson = '{"questions":['+questionsvalues+']}';   alert(questionsvaluesjson) :   {"questions":[{"question":"d","type":"radio","html":"<fieldset id="formelement_1" class="radio"><tr><td colspan="2"><legend>d</legend></td></tr><tr><td><label for="1_1">d</label></td><td><input name="radio1" value="d" type="radio"></td></tr><tr><td><label for="1_2">d</label></td><td><input name="radio1" value="d" type="radio"></td></tr></fieldset>"}]}   parsejson(questionsvaluesjson); //breaks script 

i sending json php file decoded , used in foreach loop can manipulate objects insert data mysql database, throwing error when trying use object in foreach loop.

here error : 'trying property of non-object'

here code :

php

foreach ($thearray->questions $data) {      $insert .= '("' . $data->question . '", "' . $data->type . '", "' . $data->html . '")'; } $insert = str_replace(")(","),(",$insert);  $query = "insert registrationquestions (question, type, html) values " . $insert;  $mysqli->query($query); 

there quotes inside html strings:

"html":"<fieldset id="formelement_1" class="radio"> 

this totally broken (the string values ends @ id=").

you need escape quotes \".

edit: of course answer "why doesn't work". better way indeed serialize objects json.stringify, takes care of issues , others, suggested in kevin's comment.