从php json_encode显示json数据？

Question

i have this jquery code which poplautes a input selector, which should display like this:

$("#demo-input-pre-populated").tokenInput("http://shell.loopj.com/", {
                prePopulate: [
                    {id: 123, name: "Slurms MacKenzie"},
                    {id: 555, name: "Bob Hoskins"},
                    {id: 9000, name: "Kriss Akabusi"}
                ]
            });

when i try get the vales from the database using php like this:

prePopulate: [
                    <?
                   $responses = array();
                    $topicJSON=getQtopics($getQ);
                    while($row = mysql_fetch_array($topicJSON)){
                    $response = array(
                        'id' => $row['id'],
                        'name' => $row['name']

                    );
                    $responses[] = $response;
                }
                echo json_encode($responses);
 ?>
        ],

which displays the json data like this:

 prePopulate: [
         [{"id":"1","name":"Dormitree"},
         {"id":"1482","name":"carriage of goods"}]        
        ],

but on the #demo-input-pre-populated" input i get undefined, and i think its becuase php is not echoing the json propelrly, how can i fix this thanks :))

Answer 1

If you look the two JS outputs, the only difference is that you have two extra enclosing square-brackets [] in the case where you output from PHP - so you're making an array of array of JSON objects in that case while all you need is an array of JSON objects.

Get rid of the enclosing [] for prePopulate because json_encode is already doing that for you:

prePopulate: <?
                $responses = array();
                $topicJSON=getQtopics($getQ);
                while($row = mysql_fetch_array($topicJSON)){
                        $response = array(
                       'id' => $row['id'],
                       'name' => $row['name']
                    );
                    $responses[] = $response;
                }
                echo json_encode($responses);
            ?>,