Convert function from VB to PHP

I need this function be converted to PHP from VB Function Decrypt(ByVal value As String) As String Try Dim des As New TripleDESCryptoServiceProvider [login to view URL] = New Byte(7) {} Dim pdb As New PasswordDeriveBytes(encKey, New Byte(-1) {}) [login to view URL] = [login to view URL]("RC2", "MD5", 128, New Byte(7) {}) Dim encryptedBytes As Byte() = [login to view URL](value) Dim ms As New [login to view URL]([login to view URL]) Dim decStream As New CryptoStream(ms, [login to view URL](), [login to view URL]) [login to view URL](encryptedBytes, 0, [login to view URL]) [login to view URL]() Dim plainBytes(CInt([login to view URL] - 1)) As Byte [login to view URL] = 0 [login to view URL](plainBytes, 0, CInt([login to view URL])) [login to view URL]() Return [login to view URL](plainBytes) Catch End Try End Function