Question

First time using POST

POST information is not getting from the iPhone to the PhP script. I get no errors anywhere. var_dump($_POST) shows empty. failed login returned. Any ideas where to look next or do I have a visible problem here:

     NSURL *url = [NSURL URLWithString:link];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

NSString *requestBodyString = [NSString stringWithFormat:@"txtuid=%@&txtpwd=%@", userName , password];
NSData *requestBody = [NSData dataWithBytes:[requestBodyString UTF8String]length:[requestBodyString length]];

[request setHTTPMethod:@"POST"];
[request setHTTPBody:requestBody];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"content-type"]; // added from first suggestion

connection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];

After trying it six different ways, I took a modified version from a previous post.

And yet another attempt with the same results.

NSData *data = [[NSString stringWithFormat: @"txtuid=%@&txtpwd=%@", userName , password] dataUsingEncoding:NSUTF8StringEncoding];

// set up request
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:link]];
[request setHTTPMethod:@"POST"];
NSString *boundary = [NSString stringWithString:@"--------------------------------------------------"];
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
[request addValue:contentType forHTTPHeaderField:@"Content-Type"];

// body
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"Content-Type: text/plain\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];  
[body appendData:[NSData dataWithData:data]];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];  

[request setHTTPBody:body];
connection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];

Answer 1

See my answer here about how to use POST to upload an image. It posts to forms in a PHP file. Same concept for posting data and not uploading images, but this is a working example of how to post to a PHP script using Objective-C.