Comment Php codes text in a script that is ignored by the PHP
Comments does not appears in the browser
Comments can be used to make code more readable or to annotate
Single-line comments begin with two forward slashes (//)
or a single hash sign (#).
// this is a comment
# this is another comment
Multiline comments begin with a forward slash
followed by an asterisk (/*) and end with an asterisk followed by a
forward slash (*/), as in the following:
this is a comment
none of this will
be parsed by the
Code that seems clear at the time of writing can
resemble a hopeless tangle when you try to amend it six months later.
Adding comments to your code as you write can save you time later and
help other programmers work easily with your code.
Note For more detail please see Php Manual at http://www.php.net