Concatenation
Firstly, we create the variables as shown:$first_name = 'Melissa';$last_name = 'Bank';To concatenate we use the dot operator both before the first parameter and after the second parameter.$author = $first_name . ' ' . $last_name;$book = /'The Girls\' Guide to Hunting and Fishing/';And then we print the values to the screenecho "The book $book was written by $author.
";
The book The Girls' Guide to Hunting and Fishing was written by Melissa Bank.