如何通过Ajax接收，发送和存储json数组

Question

I want to get a json array from ajax call and store it in a array . I tried this code but it doest not work .The alert shows me the string {"value":[1]},{"value":[2]} .I need this string to be converted in JSON array and stored in myData .Is there any problem about the responseJSON or any other thing ? Plz help

making a call

 setInterval(function showUser(str) { str="1"; if (window.XMLHttpRequest) { xmlhttp = new XMLHttpRequest(); } else { xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange = function() { var myData=(xmlhttp.responseJSON); window.alert(myData); } xmlhttp.open("GET","new.php?q="+str,true); xmlhttp.send(); }, 1000) 

and this is the code for new.php

 <?php $conn =mysql_connect("localhost","root","") or die ("we couldn't connect!"); mysql_select_db("webauth"); $rs = mysql_query("SELECT * FROM test") or die(mysql_error()); while($row = mysql_fetch_array($rs)) { echo '"{values":['.$row['value'].']}'.','; } } ?> 

Answer 1

You're not returning the JSON array properly, because you don't have the [ ] around the array elements. You should just construct a PHP array and call json_encode on it.

$result = array('values' => array());
while ($row = mysql_fetch_array($rs)) {
    $result['values'][] = $row['value'];
}
echo json_encode($result);

When you alert myData , it should show

{ values: [1, 2] }