print <<< HTML in php?

Question

I am not an expert on PHP. I have been given a task of adding a small amount of PHP code onto a page of an existing project. Through out the project, I am seeing code like

print <<< HTML
<h1>blah blah blah</h1>
HTML;

I have looked into the print method, and have not found discussion about the <<< HTML portion.

Does anyone know why this is how it is?

Thanks

Answer 1

This is called a HEREDOC, which is just a way of defining a multiline string.