Using a php variable in concatenated string in javascript [duplicate]

Question

I'm working on a project where the opening page is .php. It allows users to select a map file they want to view. That page sends the variable to another page that has javascript on it. I'm not a js programmer, so I'm struggling here. The problem is that I need to apply that variable from the php page to a concatenated string in the js. Here's what I have...

<script>
<?php 
  $filename = $_GET["filename"];
  $fileTrimed = str_replace(".mxd", "", $filename);
?> 
var trimmed = (<?php $fileTrimed ?>)
var firstURL = "http://localhost:6080/arcgis/rest/";
var secondURL = "/MapServer";
var finalURL = firstURL + trimmed + secondURL;

I have also tried it as...

?>
var firstURL = "http://localhost:6080/arcgis/rest/";
var secondURL = "/MapServer";
var finalURL = firstURL + $fileTrimed + secondURL;

I appreciate any help y'all can offer.

Answer 1

I think you're missing a single echo

this code :

var trimmed = (<?php $fileTrimed ?>)

Should look like :

var trimmed = (<?php echo $fileTrimed; ?>)

Answer 2

Try this-

 var finalURL = firstURL + "<?php echo $fileTrimed; ?>" + secondURL;