Passing address to Google Maps on page load

Having some problems initialising a google map using geocoding. First issue is with any commas being used in the $gmap string, second issue is with getting a "gmap_initialize is not defined". I know everything outside of the function is correct, any ideas?

<?php $gmap = "Prague, Czech Republic"; ?>

<script type="text/javascript">
function gmap_initialize() {
var geocoder = new google.maps.Geocoder();
geocoder.geocode( { 'address': <?php echo $gmap; ?>}, function(results, status) {
  if (status == google.maps.GeocoderStatus.OK) {
    var options = {
      zoom: 16,
      position: results[0].geometry.location,
      center: results[0].geometry.location,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    };
    var map = new google.maps.Map(document.getElementById("map_canvas")开发者_高级运维, options);

    var marker = new google.maps.Marker({
      map: map,
      position: results[0].geometry.location
    });
  } else {
    alert("Geocode was not successful for the following reason: " + status);
  }
});

}
</script>

Did you look at the output of your script?!

My guess is it looks something like:

geocoder.geocode( { 'address': Prague, Czech Republic}, function(results, status) {

In your PHP script, you probably actually want something like:

geocoder.geocode( { 'address': '<?php echo $gmap; ?>'}, function(results, status) {

and you'll probably want to escape single quotes out of the $gmap variable.

This looks like a JavaScript Error. Saying that this function (which looks right) is not defined. Maybe the call to gmap_initialize happens before this definition?

Usually this error comes with JavaScript when something else on the page is not quite right, such as a single missing close tag...

Have you validated the code with W3C?