Question

My application is able to send the input of several textfields to a PHP script on my server using the POST function which sends the message to my email. The problem is, some characters won’t get ‘translated’. For example: ü -> ü.

I have already checked my HTTP Header but it’s still UTF-8.

I also use this code to convert the characters:

[textFieldName.text stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding]

NSData *postData = [post dataUsingEncoding:NSUTF8StringEncoding allowLossyConversation:YES];

What am I doing wrong? Even the PHP file has this code:

function mail_utf8($to,$subject = '(No subject)',$message = '',$header = ''){
    $header_ = 'MIME-Version: 1.0' . "\r\n" . 'Content-type: text/plain; charset=UTF-8' . "\r\n";
    if(mail($to, '=?UTF-8?B?'.base64_encode($subject).'?=', $message, $header_ . $header)) return true;
    else return false;
  }

EDIT:

NSString *post = nil;
            post = [[NSString alloc] initWithFormat:@"vorname=%@&name=%@&plz=%@&ort=%@&email=%@&geburtsdatum=%@&eventdatum=%@",
                    [textFieldVorname.text stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding],
                    [textFieldName.text stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding],
                    [textFieldPLZ.text stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding],
                    [textFieldOrt.text stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding],
                    [textFieldEmail.text stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding],
                    [textFieldGeburtsdatum.text stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding],
                    [textFieldEventdatum.text stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
            NSData *postData = [post dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
            NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];
            NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
            [request setURL:[NSURL URLWithString:@"http://www.url.com/document-send.php"]];
            [request setHTTPMethod:@"POST"];
            [request setValue: postLength forHTTPHeaderField:@"Content-Length"];
            [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
            [request setHTTPBody:postData];
            [NSURLConnection connectionWithRequest:request delegate:self];

Answer 1

Okay, I found the error:

Like Peter Hosey said: the error was in decoding the utf-8 character set to ISO 8859-1 in php. Now this is the working code:

mail($email_to,$email_subject,utf8_decode($email_data),$email_header);

Thank you guys for helping me 🙂