Ajax after success, how to pass data to a variable to php

Question

I have script like this

 function getval(sel) {
         var id= sel.value;  
                $.ajax({
                        type:"POST",
                        url:"./tab.php",
                        data:{id:id,task:'search'},
                         success: function(response){
                             //(I don't know what i should write for pass to php code)
                         }
            });
    }

I don't know how I can pass data response to php code ? For Example: if I alert response, it's show 123 .so I want pass value 123 to a variable in php $id = 123

You can't do that unless you use ajax and send it again... but since the variable is already coming from PHP, what's the point? You should do all the execution in 1 php file instead of making multiple requests. — Spokey, Oct 22 '14 at 10:36
What do you actually want to do? You sent the id to post.php. What are you doing in post.php? — Andreas Furster, Oct 22 '14 at 10:41
PHP is returning the value in the first place, so why do you need to send it back to the server? — Luke, Oct 22 '14 at 10:45
@Doctus I do search from select-box, I have list data in table already but I want when user select on my select-box, it's query to select data to show in list again — start, Oct 22 '14 at 17:23

score 0 · Answer 1 · answered Oct 22 '14 at 10:38

0

response is the result passed BY php, not TO php. What's passed to php is the id and the task.

In your tab.php, you can access these two values :

<?php
$id = $_POST['id'];
$task = $_POST['task'];
//do anything you want with it...
?>

answered Oct 22 '14 at 10:38

Veve

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it's not what I asking – start Oct 22 '14 at 10:42
Then I suggest to edit your question to make it more clear, I'm not alone to think that's what was asked.. – Veve Oct 22 '14 at 12:11
this is what I asked http://stackoverflow.com/questions/26513808/php-how-to-used-select-box-for-search-data-in-list-view-table – start Oct 22 '14 at 17:48

score 0 · Answer 2 · answered Oct 22 '14 at 10:43

This is not the right workflow. PHP executes on runtime, so every time the page has finished loading you can't really put variables back into PHP (unless you reload the page). This is where AJAX comes in, so you can call PHP scripts from JavaScript / jQuery and don't have to reload the page every time.

The right thing to do is to either store the variable you have generated in the tab.php script in a database, $_SESSION, $_COOKIE or something similar like so:

//put this at the top of all your php scripts you want to use the variable in
session_start();
//now store the variable you wanted to pass (in tab.php)
$_SESSION['returnValue'] = $myValue;

Now if you want to use the variable in other pages just echo it like so (remember to add session_start() at the top of the PHP script.

echo $_SESSION['returnValue'];

score 0 · Answer 3 · edited May 23 '17 at 10:33

0

First of all, start by reading this

To answer your question,

function getval(sel) {
   var id= sel.value;  
   $.ajax({
      type:"POST",
      url:"./tab.php",
      data:{id:id,task:'search'},
      success: function(response){
         //(I don't know what i should write for pass to php code)
      }
    });
}

The result from id and task are sent via $_POST (type:"POST") to the page tab.php (url:"./tab.php"). If you want to do that on a different page, just change the url in your ajax call: url:"./any_other_page.php" and the posted values will be sent there

Finally, read THIS post as well. It is greatly written and very well explained.

Hope it helps!
Keep on coding!
Ares.

edited May 23 '17 at 10:33

Community

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answered Oct 22 '14 at 10:45

Ares Draguna

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`id` that I pass to `tab.php` is a variable for pass to get `id` to query to get data in this page – start Oct 22 '14 at 11:01
I understood 50% of what you just said... you have to pass `id` with $_GET to a different page? – Ares Draguna Oct 22 '14 at 11:02
I have ask it again with it http://stackoverflow.com/questions/26513808/php-how-to-used-select-box-for-search-data-in-list-view-table – start Oct 22 '14 at 17:50

Ajax after success, how to pass data to a variable to php

3 Answers3