URL GET/POST Request objective-c

I have to send get or post request to localhost:

<?php
 if(@$_GET['option']) {
  echo "You said \"{$_GET['option']}\"";
 }else if(@$_POST['option']) {
  echo "You said \"{$_POST['option']}\"";
 }
?>

ive using this code:

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://localhost/wsh/index.php?option=Hello"]];
 NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
 NSString *get = [[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding];

it works, but one time in code. if ill do it another one time, application has terminate.