Reputation: 76

How to pass JS variable to PHP variable

This is my first dabbling in Ajax and I'm confused.

Problem: JS variable doesn't seem to get passed to php through Ajax.

I get this notice:

Notice: Undefined index: text in C:\xampp\htdocs\Website\ref_files\delete.php on line 31

Line 31 is: $name = $_POST['text'];

So the problem seems to be that 'text' is not being passed to the php as far as I can tell?

Both the JS and the PHP are in delete.php which is included in WhatsNew.php.

I get Response: displayed on the page, as well as an alert saying "success".

There is a value in 'text', I have tested it with alert(text).

JavaScript + Ajax

<script>

var text = $('#title').text()

 $.ajax({
         url: "WhatsNew.php",
         type: "post",
         cache: "false",
         data: text,
         success: function(){
             alert("success");
         },
         error: function(){
             alert("failure");
         }
     });
</script>

PHP

<?php
$name = $_POST['text'];
echo "Response: " . $name;
 ?>

If more information is required it will be posted beyond this point.

Upvotes: 1

Answers (4)

SML

Reputation: 214

You need to change data to:

data: {text: something},

and also change the name of the variable in js, as the compiler won't know which text to take, like:

var something = $('#title').text();

Please do comment if this does not work!

Try this in php on a different file with some response in success:

<?php 
echo "hello"; 
$name = $_POST['text']; 
echo "<label id='1'>Response: " . $name . "</label>"; 
?>

Upvotes: 2

Roamer-1888

Reputation: 19288

You need to wait for the document to be ready before trying to read $('#title').text().

Just wrap everything in $(function() {...}), (and data:{text:text} as others have pointed out).

$(function() {
    var text = $('#title').text();
    $.ajax({
        url: "WhatsNew.php",
        type: "post",
        cache: "false",
        data: {text:text},
        success: function(){
            alert("success");
        },
        error: function(){
            alert("failure");
        }
     });
});

Upvotes: 0