Как декодировать сжатую строку из php в swift?

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import Foundation

func decodeStringFromPHP(encodedString: String) -> String? {
    guard let encodedData = Data(base64Encoded: encodedString) else {
        return nil
    }
    guard let inflatedData = try? encodedData.gzinflate() else {
        return nil
    }
    guard let inflatedString = String(data: inflatedData, encoding: .utf8) else {
        return nil
    }
    return inflatedString
}

let encodedString = "eNrtWc1ug0AQ/NGWZpxSdXNvoqI0SkISZUKKxIsq9KBxmu9pQiapzTp2PzHmzoXjK5+7zntOQ//GZE5XwN9VcUzBRrC1NXJF3bS7IgZCmtjXerXegABRvq+i"
if let decodedString = decodeStringFromPHP(encodedString: encodedString) {
    print(decodedString)
} else {
    print("Decoding failed.")
}