how to get array of array from post meta data in wordpress

Question

I want to get property locations from post meta data fields and display it on map dynamically,in Below code i took static locations.how to get these values ['Cronulla Beach', -34.028249, 151.157507, 3] dynamically.

  <script type="text/javascript">

var locations = [

  ['Cronulla Beach', -34.028249, 151.157507, 3],
  ['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
  ['Maroubra Beach', -33.950198, 151.259302, 1]
];

var map = new google.maps.Map(document.getElementById('map'), {
  zoom: 10,
  center: new google.maps.LatLng(-33.923036,151.28747820854187),
  mapTypeId: google.maps.MapTypeId.ROADMAP
});

var infowindow = new google.maps.InfoWindow();

var marker, i;

for (i = 0; i < locations.length; i++) {  
  marker = new google.maps.Marker({
    position: new google.maps.LatLng(locations[i][1],locations[i][2]),
    map: map
  });

  google.maps.event.addListener(marker, 'click', (function(marker, i) {
    return function() {
     infowindow.setContent(locations[i][0]);
      infowindow.open(map, marker);
    }

  })(marker, i));
 }

 </script>

i want to get those locations from post meta data fields.any help appreciated..

Answer 1

Add posts array with you desired arguments and collect all the coordinates.

$allPosts = get_posts( array(
    'posts_per_page' => 20
));
$getCord = [];
if ( $allPosts ) {
    foreach ( $allPosts as $post ) :
        $getCord[] = get_post_meta($post->ID,'addr_coordiates', true);
    endforeach; 
    wp_reset_postdata();
}

In Javascript:

<script>
var locations = <?php echo json_encode($getCord);?>
</script>