ajax响应使用pdo返回[object]并显示我的查询

Question

getting querystring sent back with my ajax response. The ajax works i know the id is being passed and i have echo the variable in php and it show correct but when i use json encode i get a an [object] alert in my and the response looks like this

response:

{"queryString":"SELECT * FROM ContactInfo WHERE id = :id"}

php:

$id = $_POST['id'];
if (empty($id)) {
    echo "no id";
}
try {
    $conn = new PDO('mysql:host=localhost;dbname=test;charset=utf8', user, pass);
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);   
    $stmt = $conn->prepare('SELECT * FROM ContactInfo WHERE id = :id');
    $stmt->execute(array('id' => $id));
    echo json_encode( $stmt);
    } catch(PDOException $e) {
        echo 'ERROR: ' . $e->getMessage();
    }

JS:

    $.ajax({
        type: "POST",
        timeout: 6000,
        data : {id: myid}, // add if using post
        dataType : 'json', //text
        crossDomain: false,
        cache: false,
        async: true,
        url: requrl,
        success: function(data) {
            alert(data);                        
        }

Answer 1

You need to pass the result array use fetch() :

$result = $stmt->fetch(PDO::FETCH_ASSOC);
echo json_encode( $result );

Then jQuery will return an object here's how you can access it:

success: function(data) {        
      alert(data.FirstName); 
}

EDIT: I noticed you're just returning one row so it's not fetchAll().

Answer 2

Try this:

$result = $stmt->execute(array('id' => $id));
echo json_encode($result);