JSON parse error on line 1 expecting Expecting '{', '['

Question

I've been trying to parse my data for a few days now and still have no clue how to get the results from my PHP array that is encoded by using json_encode. I am new to JQuery.

this is not working:

$.post('coordinate_array.php',{},function(data) {  //ERROR HERE EXPECTING SOMETHING??
 results = JSON.parse(data);
 for(i = 0;i < results.length;i++) {
  Paint(results[i].x, results[i].y);
 }
});

I'm getting my data from this php file:

<?php
include 'db_conn.php';

header('Content-Type: application/json'); //not sure if i need this here??

$coordinate_sql = "SELECT x_coord, y_coord FROM coordinates";
$result = mysqli_query($conn,$coordinate_sql);

//see if query is good
if($result === false) {
    die(mysqli_error()); 
}

//array that will have number of desks in map area
    while($row = mysqli_fetch_assoc($result)){  

    //get desk array count      
    $desk[] = array('x' => $row['x_coord'], 
                                    'y' => $row['y_coord']);
} //end while loop
    echo json_encode($desk); //encode the array
?>

Answer 1

You're not echo ing your JSON data, so the page requested by the JS call will always be empty. Use:

echo json_encode($desk);

at the end of your file.