How is the result stored in jQuery Ajax data object on success callback

Question

I'm using jQuery Ajax to send request and get response on success/failure.

Server Side

I'm using POST to send request to another script that fetches the query results from MySQL array using mysql_fetch_array($query) . When I echo this results, I get to display the string object data.

$strSQL = "SELECT name from builder";
$query = mysqli_query($con, $strSQL);

while($result = mysqli_fetch_array($query))
{
   echo $result["name"];           
}  

Client Side

success:function(data)
{
echo data;
}

In the client side, when I try to get the results I use data in success which is a string object in success callback.
How does the object get stored in data object I have the following doubts

1. When I fetch array results and echo it from PHP script, how is it copied to data object in success call back.
2. How can I seperate this result data object to form JSON string.

Addendum
When I fetch query results, I see all values are copied and cannot be separated with split function. How can I split this values.

Answer 1

使用php内部函数json_encode

Answer 2

In php you can emit json using json_encode . In jQuery's success function you can parse json and use as

success:function(data)
{
//echo data;
var parsedData = $.parseJSON(data);
// use it by index numbers as

var first_element = parsedData[0];
// ans so on..
}