How to get javascript variable to php [duplicate]

Question

i am trying to get the javascript variable value to php.

here is my javascript code:

function getResults()
{
var radios = document.getElementsByName("address");    
for (var i = 0; i < radios.length; i++)
{       
if (radios[i].checked) {
var a = radios[i].value
alert(a);
break;
}
}
}

from this javascript i want to get variable a's value inside php code onclick on submit button. how can i do this?

i tried this

$var1 = $_GET["a"];

Check out AJAX tutorials

Freeman Lambda
– Freeman Lambda

2013-08-20 09:30:51 +00:00
Commented Aug 20, 2013 at 9:30 — Freeman Lambda
– Freeman Lambda, Commented Aug 20, 2013 at 9:30

2 revs · Accepted Answer · 2013-08-20 09:51:26Z

1

Do this..

   $var1 = <?=$_GET["a"]?>;

to communicate a value from JavaScript to PHP do following

$var1 = <?=$_POST["a"]?>;

edited Aug 20, 2013 at 9:51

community wiki

2 revs
Rakesh

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Comments

Gianpaolo Di Nino · Accepted Answer · 2013-08-20 09:29:48Z

0

What you tried is almost correct:

var a = <?=$_GET["a"]?>;

answered Aug 20, 2013 at 9:29

Gianpaolo Di Nino

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1 Comment

ciruvan Over a year ago

Seems to me OP wants to know how to get JS variables to PHP, not vice versa.

ciruvan · Accepted Answer · 2013-08-20 09:31:27Z

0

Since javascript code runs on client-side, but PHP is server-side code, you need to send your JS variables to the server. You can do this using AJAX.

Hint: AJAX calls usually use POST instead of GET.

answered Aug 20, 2013 at 9:31

ciruvan

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Comments

Michael · Accepted Answer · 2013-08-20 09:37:47Z

-1

Replace:

 $var1 = $_GET["a"];

on:

 $var1 = <?=$_POST["a"]?>;

edited Aug 20, 2013 at 9:37

answered Aug 20, 2013 at 9:31

Michael

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1 Comment

Jonathan Lonowski Over a year ago

The goal seems to be to communicate a value from JavaScript to PHP, not the other way around.

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