Passing Javascript variable to Laravel (PHP)

You'd probably have to use an ajax request for this. The javascript variable cannot be read by your PHP code. Besides, you can't call your PHP code in your script tags at runtime.

there's no way to do this without making a new request to your backend.

@nana and @ashkan90 are right, the PHP will be run first, with the results going to the visitor's browser, then after that the javascript that was sent to them will run.

You can send the variable "name" through an ajax request to a page, but then your Laravel web route will need to handle the request.

A good video I found on making ajax requests against Laravel is this one (which uses axios to make it even easier): https://laracasts.com/series/learn-vue-2-step-by-step/episodes/18

For yours, your javascript might look something like this:

var name = path.split('/').pop();
var fullPath = "{{ route('download.file', ':path')}}";
axios.get("/encrypt?value=" + name).then(response => fullPath = fullPath.replace(':path', response.data));

And your web.php routes file might look like this:

Route::get('/encrypt/{value}', function($value) {
  return Crypt::encrypt($value);
});

For me, to make axios work (I'm super new to this) I had to install Node and run "npm install" on the command line at my app root, then run "npm run watch" so it would build my .js file, then I added the <script src="/js/app.js"></script> tag into my blade template's header.

I hope that helps!

OK @nana

Thanks @oneseventeen let me give it a try with the Ajax request

Laracast has a helper for this, maybe it helps you.

https://github.com/laracasts/PHP-Vars-To-Js-Transformer

Wrong direction, @ltroya . He wants to pass JS to PHP, not the other way around :)

@ftiersch oh, sorry. I misread it.