PHP 和 C# 中的 DES 加密

I'm trying to achive the same DES encription that I've in an C# code but in PHP.

C# 代码如下所示:

public static string EncriptarCadena(string strEncriptar)
{
    DESCryptoServiceProvider provider;

    MemoryStream stream;
    CryptoStream stream2;
    string str2;
    string str = "29393651";
    byte[] buffer2 = new byte[] { 0x45, 50, 0xa5, 0x18, 0x67, 0x58, 0xac, 0xba };
    byte[] bytes = new byte[0];
    try
    {
        bytes = Encoding.UTF8.GetBytes(str.Substring(0, 8));
        provider = new DESCryptoServiceProvider();
        byte[] buffer = Encoding.UTF8.GetBytes(strEncriptar);
        stream = new MemoryStream();
        stream2 = new CryptoStream(stream, provider.CreateEncryptor(bytes, buffer2), CryptoStreamMode.Write);
        stream2.Write(buffer, 0, buffer.Length);
        stream2.FlushFinalBlock();
        str2 = Convert.ToBase64String(stream.ToArray());
    }
    catch (Exception)
    {
        str2 = "";
    }
    finally
    {
        provider = null;
        stream = null;
        stream2 = null;
    }
    return str2;
}

到目前为止，我在 PHP 中所做的代码如下:

function encrypt($string) {
    //Key
    $key = "29393651";
    $ivArray=array( 0x45, 50, 0xa5, 0x18, 0x67, 0x58, 0xac, 0xba );
    $iv=null;
    foreach ($ivArray as $element)
        $iv.=CHR($element);

    echo "Key: $key    IV: $iv<br>";

    $encrypted_string = mcrypt_encrypt(MCRYPT_DES, $key, $string, MCRYPT_MODE_CBC, $iv);

    return base64_encode($encrypted_string);
}