Why are these symbols added to the cases in the tutorial? I tried adding symbols but it didn't work.

Question

This is a case in the PHP tutorial. I don’t understand what these symbols do? Can anyone help explain

Answer 1

There are no these two symbols in PHP, there is only one <<< symbol.

Start with the <<<End start tag and end with the End end tag. The end tag must be written at the top, without indentation or spaces, and there must be a semicolon at the end of the end tag. The start tag is the same as the start tag. For example, it is commonly represented by uppercase EOT, EOD, and EOF, but �%

Answer 2

is the prompt symbol of the editor, you can just remove it instead of adding