need help Converting C# decrypt to laravel / php

static void Main(string[] args)
{

    // THIS IS JUST A SAMPLE 16 BYTE KEY!!! //
    String secretKey = "password";

    // For this demo, we are using a local file //
    //String inputFile = "BatchSerialTransImport_20141106_0002_Sample.xlsx.encrypted";
    String inputFile = "test.xlsx.encrypted";
    // ...and saving to a local file too!  //
    String outputFile = "test.xlsx";

    try
    {
        // We are using an AES Crypto with ECB and PKCS7 Padding
        using (RijndaelManaged aes = new RijndaelManaged())
        {
            byte[] key = ASCIIEncoding.UTF8.GetBytes(secretKey);
            byte[] IV = ASCIIEncoding.UTF8.GetBytes(secretKey);

            aes.Mode = CipherMode.ECB;
            aes.Padding = PaddingMode.PKCS7;

            using (FileStream fsCrypt = new FileStream(inputFile, FileMode.Open))
            {
                using (FileStream fsOut = new FileStream(outputFile, FileMode.Create))
                {
                    using (ICryptoTransform decryptor = aes.CreateDecryptor(key, IV))
                    {
                        using (CryptoStream cs = new CryptoStream(fsCrypt, decryptor, CryptoStreamMode.Read))
                        {
                            int data;
                            while ((data = cs.ReadByte()) != -1)
                            {
                                fsOut.WriteByte((byte)data);
                            }
                            cs.Flush();
                            cs.Close();
                            fsOut.Flush();
                            fsOut.Close();
                            fsCrypt.Close();
                        }
                    }
                }
            }
        }
    }

    catch (Exception ex)
    {
        // failed to decrypt file
        Console.WriteLine("Errors : "+ex.Message);
    }
    Console.ReadLine();
}

I am using the code above, it works when I decrypt anything from C#. problem is - I want to add UI and change to laravel.

This code works - write encrypted file name in inputFile field and password in secretKey field - run - generate decrypt file

How can I get this type of decryption in laravel/php ?

via Chebli Mohamed