php, string to int

Question

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(screen.width)</script>';
$width = (int)$width_s;

var_dump($width);

Are you trying to just return the screen width? Right now you're trying to cast a string that's full of text into an integer in the example you've given... what are you expecting the integer output to be? — DaOgre
– DaOgre, Commented Apr 19, 2011 at 21:31
How can you get 1024 printing $width_s??? You can't mix server-side and client-side code this way. — gd1
– gd1, Commented Apr 19, 2011 at 21:32
(int)"anything that doesn't start with a number" always evaluates to 0. What are you actually trying to accomplish? Getting the screen.width?? — Kevin Peno
– Kevin Peno, Commented Apr 19, 2011 at 21:33
but i get " $width_s" this value. If you don't believe, try my code :) — lolalola
– lolalola, Commented Apr 20, 2011 at 6:36
This is one of the reasons why I ignored the php tag. (Not the question or the answers, but these comments.) — BoltClock
– BoltClock, Commented Apr 20, 2011 at 10:20

Dereleased · Accepted Answer · 2011-04-19 21:36:28Z

11

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: data~~base~~ != data

edited Apr 19, 2011 at 21:36

answered Apr 19, 2011 at 21:29

Dereleased

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user123 · Accepted Answer · 2011-04-19 21:29:17Z

2

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

answered Apr 19, 2011 at 21:29

user123

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Comments

jcarlosn · Accepted Answer · 2011-04-19 21:29:00Z

0

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.

answered Apr 19, 2011 at 21:29

jcarlosn

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