How to send the Content of multiple TextFields to a PHP Script using the Post method?

That depends on how the HTTP server expects the

POST

• If it’s expecting JSON data, you’d use

  JSONSerialization

  to serialise some native values to a

  Data

  value you can use for the HTTP request’s body.

• If it’s expecting

  application/x-www-form-urlencoded

  , there’s no iOS API to building the required body data. If you can either use a third-party library to do this or simply write the code yourself.

  Note Pasted in below is the code I use to do this.

• And so on

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

/// Encodings the key-values pairs in `application/x-www-form-urlencoded` format.
///
/// The only specification for this encoding is the [Forms][spec] section of the
/// *HTML 4.01 Specification*.  That leaves a lot to be desired.  For example:
///
/// * The rules about what characters should be percent encoded are murky
///
/// * It doesn't mention UTF-8, although many clients do use UTF-8
///
/// [spec]: <http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4>
///
/// - parameter formDataSet: An array of key-values pairs
///
/// - returns: The returning string.

func urlEncoded(formDataSet: [(String, String)]) -> String {
    return formDataSet.map { (key, value) in
        return escape(key) + "=" + escape(value)
    }.joined(separator: "&")
}

/// Returns a string escaped for `application/x-www-form-urlencoded` encoding.
///
/// - parameter str: The string to encode.
///
/// - returns: The encoded string.

private func escape(_ str: String) -> String {
    // Convert LF to CR LF, then
    // Percent encoding anything that's not allow (this implies UTF-8), then
    // Convert " " to "+".
    //
    // Note: We worry about `addingPercentEncoding(withAllowedCharacters:)` returning nil
    // because that can only happen if the string is malformed (specifically, if it somehow
    // managed to be UTF-16 encoded with surrogate problems) <rdar://problem/28470337>.
    return str.replacingOccurrences(of: "\n", with: "\r\n")
        .addingPercentEncoding(withAllowedCharacters: sAllowedCharacters)!
        .replacingOccurrences(of: " ", with: "+")
}

/// The characters that are don't need to be percent encoded in an `application/x-www-form-urlencoded` value.

private let sAllowedCharacters: CharacterSet = {
    // Start with `CharacterSet.urlQueryAllowed` then add " " (it's converted to "+" later)
    // and remove "+" (it has to be percent encoded to prevent a conflict with " ").
    var allowed = CharacterSet.urlQueryAllowed
    allowed.insert(" ")
    allowed.remove("+")
    return allowed
}()