Sessions not setting using jquery and ajax

Question

I have this code which uses jquery and ajax to send a request to the other page i.e.

<html>
 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>

 <input type="button" id="butt"  value="button11111111111111" >
 </html>
 <script>

    $("#butt").on('click',function(e)
    {
        $.ajax(
            {
                type:'POST',
                url:'testmysql.php',
                data:
                {
                    product_type:"cake";
                }

            });

    });


</script>

When i click the above button it should send the request and data to the other file testmysql.php

<?php

session_start();

$_SESSION['type']=$_POST['product_type'];
echo $_SESSION['type'];
?>

However , when i refresh the other page after clicking the button i do not see any kind of echo and it gives me a notice stating

Undefined index: product_type

Since, i am new to ajax and jquery is there anything i am missing ?if yes,then what should i do to make this work ?

Thanks!

Note: Both of them are in the same directory.

why you are refreshing the page. you are sending a ajax request to the testmysql.php page. — Mazba Kamal
– Mazba Kamal, Commented Feb 14, 2016 at 7:16
i have sent a request to the other page which will set the data.So in order to view that i should refresh the page right ? — Tilak Raj
– Tilak Raj, Commented Feb 14, 2016 at 7:23

Rajdeep Paul · Accepted Answer · 2016-02-14 07:16:43Z

1

First of all, remove the semicolon(;) from this statement,

product_type:"cake";
                   ^

otherwise it will give you syntax error. And now comes to your issue.

when i refresh the other page after clicking the button i do not see any kind of echo and it gives me a notice stating Undefined index: product_type

That because when you refresh testmysql.php page, the $_POST array would be empty, and there would be no index named product_type in $_POST array. You can verify it using var_dump($_POST);.

On testmysql.php page you can check whether $_POST['product_type'] is set or not like this:

<?php
    session_start();

    if(isset($_POST['product_type'])){
        $_SESSION['type']=$_POST['product_type'];
        echo $_SESSION['type'];
    }
?>

answered Feb 14, 2016 at 7:16

Rajdeep Paul

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1 Comment

Rajdeep Paul Over a year ago

@user5871514 On testmysql.php page you can do something like this: if(isset($_SESSION['type'])){ echo $_SESSION['type']; }

Mazba Kamal · Accepted Answer · 2016-02-14 07:30:56Z

1

you added the ; at the end of the data object. remove it and try.
and you are sending a ajax request to the testmysql.php page, the $_POST['product_type'] will available when you are send the request. when you refresh the page the you are not sending any post request to testmysql.php page.

edited Feb 14, 2016 at 7:30

answered Feb 14, 2016 at 7:12

Mazba Kamal

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