I'm at my wits end with this one, because I've used very similar code in the past, and it worked just fine.

The following code results in empty $_POST variables on the server. I verified this with:

file_put_contents('log_file_name', "log: ".$word, FILE_APPEND);

the only contents of log_file_name was "log: "

I then verified the PHP with a simple HTML form. It performed as expected.

The Objective-C:

    NSString *word = "this_word_gets_lost";
    NSString *myRequestString =  [NSString stringWithFormat:@"word=%@",
                                  word];

    [self postAsynchronousPHPRequest:myRequestString toPage:@"http://www.mysite.com/mypage.php" delegate:nil];
}

-(void) postAsynchronousPHPRequest:(NSString*)request toPage:(NSString*)URL delegate:(id)delegate{
    NSData *requestData = [ NSData dataWithBytes: [ request UTF8String ] length: [ request length ] ];
    NSMutableURLRequest *URLrequest = [ [ NSMutableURLRequest alloc ] initWithURL: [ NSURL URLWithString: URL ] ]; 
    [ URLrequest setHTTPMethod: @"POST" ];
    [ URLrequest setHTTPBody: requestData ];

    [ NSURLConnection connectionWithRequest:URLrequest delegate:delegate];
    [URLrequest release];
}

The PHP:

$word = $_POST['word'];
file_put_contents('log_file_name', "log: ".$word, FILE_APPEND);

What am I doing wrong in the Objective-C that would cause the $_POST variable to be empty on the server?