PHP JSON到Javascript [重复]

in php

<?php
    $arr = array ('a'=>1,'b'=>2,'c'=>3,'d'=>4,'e'=>5);
    echo json_encode($arr); // {"a":1,"b":2,"c":3,"d":4,"e":5}
?>

in javascript,

$.getJSON('drivetracker2.php', function(data) {
    console.log(data);
});

I am trying to access the php array which was sent via json to javascript.
but it says data is undefined.
anyone know why and how to fix this problem?

</div>

Try this

 $.post('drivetracker2.php', function(data) {
  console.log(data);
 },'json');

Add this just before you echo the json.

header('Content-Type: application/json');