Pass variable from web view to Xcode and store as NSString

Question

I am trying to pass a variable from a form filled out by a web view and store it as an NSString in Xcode. I have a signup page that stores the variable as a cookie. Then in another page I am trying to return that cookie as a variable and return it to Xcode. I think I am pretty close, but I need some assistance.

Xcode:

NSString *strURL = [NSString stringWithFormat:@"http://www.website.com/get_id.php"];
NSData *dataURL = [NSData dataWithContentsOfURL:[NSURL URLWithString:strURL]];

NSString *strResult = [[NSString alloc] initWithData:dataURL encoding:NSUTF8StringEncoding];

UIAlertView *alert = [[UIAlertView alloc] 
                       initWithTitle:@"Your ID" 
                       message:strResult 
                       delegate:self 
                       cancelButtonTitle:@"Dismiss" 
                       otherButtonTitles:nil, nil];
[alert show];
return;

PHP:

<?php

$result = action($a, $b);
echo $result;

function action($a, $b){
    $your_email = $_COOKIE["your_email"];
    return $your_email;
}

?>

Thank you very much for your time and assistance!