transferring a javascript value to a php variable

Question

What is the best way to transfer the following outputted value into a php variable?

$(document).getUrlParam("id");

send that value to a php script using get or post request..

Adil Shaikh
– Adil Shaikh

2012-07-02 21:37:03 +00:00
Commented Jul 2, 2012 at 21:37 — Adil Shaikh
– Adil Shaikh, Commented Jul 2, 2012 at 21:37

Travis J · Accepted Answer · 2012-07-02 21:37:28Z

4

Through an ajax post.

$.ajax({
 type: 'POST',
 url: url,
 data: data,
 success: success,
 dataType: dataType
});

answered Jul 2, 2012 at 21:37

Travis J

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3 Comments

Michael Grigsby Over a year ago

That was what I was originally gonna do but i didn't know if i had to post it to the same page because the php is on the same page.

Travis J Over a year ago

@MichaelGrigsby - You are going to have to post to the server side (or get depending on security) and then you will have to reload that part of the page. How you reload the page, or part of the page, will depend on your structure.

Michael Grigsby Over a year ago

so i can't post to the same page that the jquery is on?

KoU_warch · Accepted Answer · 2012-07-02 21:54:06Z

3

You should use JSON format to send and receive data from javascript to PHP. For example

 function sendData(){

  //with jquery, you can use `.post()`, `.get()` or for more control `.ajax()`
  $.post(
      //URL to send the data
       url,
      //data being sent, transformed to JSON
      {dataSent: JSON.stringify(clientSideData)},
      //Do something after sendind the data to server
      function(dataReceived){
         //transform data from json format to javascript object
         var dataLog = jQuery.parseJSON(dataReceived);

         //Do stuff

      }
   )
  }

PHP:

 //Receive data from POST
 var phpVar = json_decode($_POST['dataSent'])

 //send data back to javascript
 echo json_encode(phpVar)

edited Jul 2, 2012 at 21:54

answered Jul 2, 2012 at 21:37

KoU_warch

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Comments

Rob Forrest · Accepted Answer · 2012-07-02 23:25:47Z

1

While all of these answers will get the value from javascript into the PHP script, I'd wonder if you need javascript at all.

From what I can see from a brief google the getUrlParam plugin is useful for getting and then breaking down the URL. Have you had a look at the variables available through $_SERVER? I'm sure you'd be able to find something suitable in there.

answered Jul 2, 2012 at 23:25

Rob Forrest

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1 Comment

Michael Grigsby Over a year ago

I write in CodeIgniter and I can't seem to get the $this->input-get() method to work. So I figured I'd try a different route.

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