programming-for-dummies

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Creating Comments
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The tags define the beginning and ending of a PHP program.
PHP programs (scripts) are usually stored in a file that ends with the .php
file extension.
Creating Comments
To write a comment in PHP, you have three choices: //, #, or /* and */ symbols.
Both the double slash (//) and the number (#) characters are used to
create comments on a single line, such as
// This is the beginning of the PHP program.
# This is the end of the PHP program
If you want to write a comment over multiple lines, use the /* and the */
characters, such as
/* This is the beginning of the PHP program.
If a comment extends over multiple lines,
It’s easier to use these types of comment
symbols instead. */