Question

inspite of the all the efforts that i gave on typecasting using (int) and intval() function. I am still not able to convert string to integer.
Whenever I use these function the string gets converted to 0
Here’s my code snippet :

$resolution = "<script type='text/javascript'> 
                  document.write('#'+screen.width+'#');</script >";
$screen=str_replace("#","",$resolution);
echo $wid = (int)$screen;
echo $s = 98 * $wid;

The output of the typecast is 0.
I even tried to print the data using var_dump but it also shows as int(0)

Answer 1

Your logic is flawed.
You are mixing server and client code.

Server generates code (php) and then passes the results to the client.
Client then receives the generated results and parses the javascript.

<?php
// this is server code, resolution will be just a string to the server
$resolution = "<script type='text/javascript'> document.write('#'+screen.width+'#');</script>";
// you are now removing the # from the above string but keeping it all intact
$screen=str_replace("#","",$resolution);
// converting it to int returns a stupid value (zero?)
echo $wid = (int)$screen;
echo $s = 98 * $wid;
?>