I had an image made to put into my index.php page on my site for the header at the top of the page.What is the code to implement this?

Which sitebuilder are you using?
And is this a header that is going to be repeated across the width of the site?
Or is it not to be repeated but is supposed to cover the width?
Your width, is that a fixed width, or is it 'wall to wall'?
Are you building a responsive site?
Are you using css?
Is the image going to appear on just the index page or on all the pages?

As you see, it would be better to give us a bit more information so that we can help.

This is NOT going to be repeated across the width of the site, BUT is suppose to cover the width of the site.

My site is: http://www.vacationcottagerentals.co

The header needs to be, of course, at the top of the code..

Above the nav?

Use this for the header in your css file:


And then in the html file this line where you want the header to appear: