Transfer javascript var to php var?

Question

As i would like to determine whether theres a # in the link, and you only can do this in Javascript, I would like to transfer a JS variable to PHP.

So if i have:

if(location.hash){
var hash = location.hash;

the hash var needs to be turned in to a php $hash var..

I also tried if not possible, sending in post the variable,

$.post('photo.php?mode=grab', { hash: hash }, function(result) { 
// ..but then i got stuck, how should i transfer to php var from here?

benhowdle89 · Accepted Answer · 2011-01-17 13:04:00Z

3

$hashVar = $_POST['hash'];

This what you're after?

$("#trigger").click(function(){
var hash = location.hash; 

 $.ajax
  ({
  type: "POST",
  url: "file.php",
  data: hash,
  //cache: false,
  success: function(html)
   {
    alert(html);
   }
  });

 return false;
});

answered Jan 17, 2011 at 13:04

benhowdle89

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3 Comments

Karem Over a year ago

no i already have this, i want a $hash(PHP variable) that contains the location.hash..

benhowdle89 Over a year ago

i'm confused. just change $hashVar to $hash? Is that what you mean?

Karem Over a year ago

Noo, ok you have the hash variable in javascript right? Now how would you get it out from javascript in to a php variable (lets call it $hash) forget the ajax call you made, i know you can get it to a variable through the ajax call, but then the variable is on file.php and not the current file you are in(e.g index.php)

Spudley · Accepted Answer · 2011-01-17 13:09:01Z

0

The posted string will be available to PHP in the $_POST variable.

Since you're posting a Javascript object using JQuery, PHP should receive it as a JSON string.

You can convert the JSON string into a PHP array using the PHP function json_decode().

Similarly, if you need to send an array back from PHP to Javascript, use json_encode() in PHP to reverse the process and create a JSON object.

answered Jan 17, 2011 at 13:09

Spudley

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2 Comments

Karem Over a year ago

Yes but the $.post will go to photo.php?mode=grab right? and in this file, the variable can get defined, but i want to get the php variable defined on the same page as the javascript variable is..

Spudley Over a year ago

@Karem - if I'm understanding you correctly, then the answer is to post it using an old-style HTML form that forces a page reload.

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