Assign javascript value to php variable [duplicate]

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

You cannot achieve what you want...

The reason being

$widthChecked  is "<script>document.write(mobileFormReady);</script>";
and not 22 or 55.

The reason you are getting the value on echo is because it is executing the script and not printing the value of $widhcheck