how to assign javascript variable value to php variable

Question

I have declared a javascript variable ,

 var myJavascriptVar = 12345;

And unable to assign that value to php variable;

Answer 1

I guess you can use cookies for it.

1) First add a cookie jquery plugin.

2) Then store that window width in a cookie variable.

3) Access your cookie in PHP like $_COOKIE['variable name'].

http://www.w3schools.com/php/php_cookies.asp

Answer 2

Javascript will be interpreted in Client's browser and you can not assign it to PHP variable which is interpreted on SERVER .

Feasible Solution : You can submit the Javascript value via ajax or through form submit.