markerArray.php

<!DOCTYPE html>
<html>
  <head>
    <title>Simple Map</title>
    <meta name="viewport" content="initial-scale=1.0">
    <meta charset="utf-8">
    <style>
      /* Always set the map height explicitly to define the size of the div
       * element that contains the map. */
      #map {
        height: 100%;
      }
      /* Optional: Makes the sample page fill the window. */
      html {
        height: 100%;
        margin: 0;
        padding: 0;
		text-align: center;
      }

      #map {
        height: 500px;
        width: 600px;
      }
    </style>
  </head>
  <body>
  <div id="map"></div>
    <script>

		var locations = [
		  ['CHAN', 12.598682, 102.125576],
		  ['chon', 13.369257, 101.008726]		
		];

      function initMap() {
			var mapOptions = {
			  center: {lat: 13.369257, lng: 101.008726},
			  zoom: 8,
			}
				
			var maps = new google.maps.Map(document.getElementById("map"),mapOptions);
			
			var marker, i, info;

			for (i = 0; i < locations.length; i++) {  

				marker = new google.maps.Marker({
				   position: new google.maps.LatLng(locations[i][1], locations[i][2]),
				   map: maps,
				   title: locations[i][0]
				});

				info = new google.maps.InfoWindow();

			  google.maps.event.addListener(marker, 'click', (function(marker, i) {
				return function() {
				  info.setContent(locations[i][0]);
				  info.open(maps, marker);
				}
			  })(marker, i));

			}

		}
    </script>
    <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCn-0PFuaZ0GNJu7-Fff7g3fAfZNQv55ms&callback=initMap" async defer></script>
  </body>
</html>