A comment in PHP code is a line that is not executed as part of the program. Comment provide the short description about the particular piece source code.
Purpose of comment block are :
- Provide the information to other programmer about the source code of program.
- Remind yourself of what you did - Most programmers have experienced coming back to their own work a year or two later and having to re-figure out what they did. Comments can remind you of what you were thinking when you wrote the code.
Single Line Comments :
In PHP we can use the single line comment in two ways:
- // (C++ style single line comment)
- # (Unix Shell style single line comment)
<?php // this is C++ style single line comment # this is Unix Shell style single line comment echo "Welcome to PHP single line comments"; ?>
PHP Multi Line Comments
In PHP we can use the multiple line comment as follow:
<?php /* Write anything in comment block will not be displayed on the browser; */ echo "Welcome to PHP multi line comment"; ?>