Send string data to php server in iOS/Objective C

 
 NSString *myRequestString = [[NSString alloc] initWithFormat:@"username=%@&password=%@&password2=%@", username, password, password2];
    NSData *myRequestData = [ NSData dataWithBytes: [ myRequestString UTF8String ] length: [ myRequestString length ] ];
    NSMutableURLRequest *request = [ [ NSMutableURLRequest alloc ] initWithURL: [ NSURL URLWithString:@"http://pratheepan.info/ws4/register.php"]];
   
    [request setHTTPMethod: @"POST"];
    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"content-type"];
    [request setHTTPBody: myRequestData];
    NSURLResponse *response;
    NSError *err;
    NSData *returnData = [NSURLConnection sendSynchronousRequest: request returningResponse:&response error:&err];
    NSString *content = [NSString stringWithUTF8String:[returnData bytes]];
    NSLog(@"responseData------------------: %@", content);