php, string to int

how convert from string to int?

    If i print $width_s, get: 1024 
If i print $width, get 0.

How convert string to integer(number) ?

$width_s = '<script language="javascript">document.write(scr开发者_如何学编程een.width)</script>';
$width = (int)$width_s;

var_dump($width);

PHP is executed on the server side, while javascript is executed on the client side; if you want a value from javascript to be sent to PHP, you will need to write up some kind of script to pass the data, via AJAX, GET, etc.

edit: database != data

You can use the php function intval($string). Learn about it here.

see:

http://www.php.net/intval

The problem with your code is that its a string with characters that aren't numbers, so casting to int isn't possible. Intval returns only the numeric part of a given string.