How to fetch data from database in cordova app with ajax in wordpress?

fetch data from database in cordova app with ajax in wordpress.

Paste in funtion.php file.

 function fetch_cordova_message(){

if(function_exists('date_default_timezone_set')) {
date_default_timezone_set("Asia/Kolkata");
}

// then use the date functions, not the other way around
$date = date("d/m/Y");
$date1 =  date("H:i a");

global $wpdb;
$table_name = $wpdb->prefix ."customer";
$result = $wpdb->get_results ( "SELECT * FROM $table_name Order by ID desc" );
foreach ( $result as $print ) 
{
            echo'<div class="list_row"><div class="per_name">'.$print->person .'</div><div class="full_view">></div></div>';
        }

die();
 }

 add_action('wp_ajax_nopriv_fetch_cordova_message','fetch_cordova_message');
 add_action('wp_ajax_fetch_cordova_message','fetch_cordova_message');

function add_cors_http_header(){
    header("Access-Control-Allow-Origin: *");
}
add_action('init','add_cors_http_header');

add_filter( 'wp_headers', 'send_cors_headers', 11, 1 );
function send_cors_headers( $headers ) {
    $headers['Access-Control-Allow-Origin'] = $_SERVER[ 'HTTP_ORIGIN' ];
    return $headers;
}

Paste in main file.

jQuery(document).ready(function($){

function fetch_customer_list(){

var ajax = "http://wpcodekit.com/wp-admin/admin-ajax.php";

  var data = {

'action' : "fetch_cordova_message"

}

$.post(ajax,data,function(response){

//$("#response").html(response);

//console.log(response);

$('.customer_list').html(response);

});

}

fetch_customer_list();

});