How to echo js value in php

Question

I have a script showing below

 for (var i = 0; i < checkboxes.length; i++) {
        var checkbox = checkboxes[i];
        checkbox.onclick = function() {
            var currentRow = this.parentNode.parentNode;
            var secondColumn = currentRow.getElementsByTagName("td")[1];

            alert("My text is: " + secondColumn.textContent );
        };
    }

SO I have a variable secondcolumn I want value of this variable in php... How can I do this... I have tried this in php:

echo $id= secondColumn.value;
echo "<script>alert('".$id."');</script>";

but not work anymore... Please help

Can you provide more details? What you really trying to do? – Hassan Sardar Dec 20 '14 at 08:02 — Hassan Sardar, Dec 20 '14 at 08:02
What you want to do with this variable in php? – waki Dec 20 '14 at 08:03 — waki, Dec 20 '14 at 08:03

score 0 · Answer 1 · answered Dec 20 '14 at 08:05

There's a few ways to do this, but the easiest I've found is to set some hidden value on the page/element to whatever you want to use, and then bring it into javascript.

So, on your HTML, for example:

<td data-id="<?php echo $id; ?>"

Then, in javascript:

 for (var i = 0; i < checkboxes.length; i++) {
        var checkbox = checkboxes[i];
        checkbox.onclick = function() {
            var currentRow = this.parentNode.parentNode;
            var secondColumn = currentRow.getElementsByTagName("td")[1];

            var el = document.querySelectorAll('td'); // You need to be more specific here....
            var your_value = el.getAttribute('data-id');

            alert("My text is: " + secondColumn.textContent );
        };
    }

hassan · Answer 2 · 2014-12-22T07:56:07.280

0

you can not append the javascript value to php variable
but you can call javascript variable just like that

echo "<script>alert(secondColumn);</script>";

edited Dec 22 '14 at 07:56

answered Dec 20 '14 at 08:07

hassan

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This returns alert(secondColumn); – APURV PATEL Dec 22 '14 at 06:59
Is there any method to get variable of javascript in php – APURV PATEL Dec 22 '14 at 07:00
@APURVPATEL sorry i have edited my answer – hassan Dec 22 '14 at 07:56

score 0 · Accepted Answer · answered Dec 20 '14 at 08:32

you have to use ajax for this:

because the main reason is php it self.it will be executed before even your document is loaded so you can not assign a javascript variale to a php but the reverse is always possible.

read here about ajax:

http://api.jquery.com/jquery.ajax/

How to echo js value in php

3 Answers3