There is a php file with the code:

& lt ;?
$ Name = $ line ['Name'];
$ Adres = $ line ['Adres'];
$ Lat = $ line ['Lat'];
$ Lng = $ line ['Lng'];
? & gt;
& lt; html & gt;
& lt; head & gt;
& lt; script type = "text / javascript" src = "scripts / load_map_step.js" & gt; & lt; / script & gt;
& lt; / head & gt;
& lt; body & gt;
& lt; / body & gt;
& lt; / html & gt;

Ie in php, I assigned values ​​to variables, and now I want to access them from the load_map_step.js file. I try this but nothing works, the data is empty …

var mylat = $ (Lat) .val ();
var mylong = $ (Lng) .val ();

Answer 1, authority 100%

They can be passed to JS in one of the following ways:

• via GET parameters, if the document is referenced from somewhere
• embedding the value of variables in the DOM document
• by loading via AJAX from the server, for example, by generating a JSON response
• via cookie
• generating JS code using PHP

The simplest case is passing variables through the DOM, you can put them, for example, in the data attribute of some hidden div document

& lt;? php
$ Name = $ line ['Name'];
$ Adres = $ line ['Adres'];
$ Lat = $ line ['Lat'];
$ Lng = $ line ['Lng'];
? & gt;
& lt; html & gt;
& lt; head & gt;
& lt; script type = "text / javascript" src = "scripts / load_map_step.js" & gt; & lt; / script & gt;
& lt; / head & gt;
& lt; body & gt;
& lt; div
 class = 'hidden'
 data-name = '& lt;? = $ Name? & gt;'
 data-address = '& lt;? = $ Adres? & gt;'
 data-lat = '& lt;? = $ Lat? & gt;'
 data-lng = '& lt;? = $ Lng? & gt;'
& gt; & lt; / div & gt;
& lt; / body & gt;
& lt; / html & gt;

Then if you are using jQuery, you can access these attributes through the data () method

var mylat = $ ('div.hidden'). data ('lat');
var mylong = $ ('div.hidden'). data ('lng');

Answer 2, authority 43%

You fail because by the time you try to access from a js file on the user’s machine to the variables located on the server , then these variables are already “dead” . PHP worked, gave the data to the user, and no longer knows what is happening with the page in the user’s browser.
I would start a file like vars.php :

& lt ;? Header ("Content-type: application / javascript"); ? & gt;
var Name = & lt;? = $ line ['Name'];? & gt;
var Adres = & lt;? = $ line ['Adres'];? & gt;
var Lat = & lt;? = $ line ['Lat'];? & gt;
var Lng = & lt;? = $ line ['Lng'];? & gt;

In markup:

& lt; html & gt;
& lt; head & gt;
& lt; script type = "text / javascript" src = "scripts / vars.php" & gt; & lt; / script & gt;
& lt; script type = "text / javascript" src = "scripts / load_map_step.js" & gt; & lt; / script & gt;
& lt; / head & gt;
& lt; body & gt;
& lt; / body & gt;
& lt; / html & gt;

Answer 3, authority 14%

Since php is executed on the server and js on the client, one of the ways to get the value of the variables is to simply display them in a script block, like this

& lt ;?
  $ Name = $ line ['Name'];
  $ Adres = $ line ['Adres'];
  $ Lat = $ line ['Lat'];
  $ Lng = $ line ['Lng'];
? & gt;
& lt; html & gt;
  & lt; head & gt;
    & lt; script & gt;
      var Lat = '& lt;? = $ Lat? & gt;';
    & lt; / script & gt;
    & lt; script type = "text / javascript" src = "scripts / load_map_step.js" & gt; & lt; / script & gt;
  & lt; / head & gt;
  & lt; body & gt;
  & lt; / body & gt;
& lt; / html & gt;

Now, at the moment of script execution, a global variable will be declared, which will be available inside the loaded script.

Additional option: add server settings so that js files are also processed as php.