Is there a car adapter for iPhone if the radio is not equipped with a port?

My car is 2005 and the radio does not have a port to accept plug

Yes but you will need to still control the music from the Ipod. You can get a simple FM transmitter that allows you to play the Ipod through a wireless signal picked up by your car's antenna via a specific frequency on your FM tuner. An even better solution is a wired adapter that still uses your car's FM tuner, but has a wired connection which is more stable than a wireless one.

Here's one that fits any car with a standard antenna input:

http://www.sonicelectronix.com/item_22240_Scosche-FMMOD02.html

What is a 2005? 2005 yugo? Mercedes? Honda?

https://www.oemautosound.com/c-20-auxiliary-input.aspx