PHP Comments: 004

[Cohort Master]

Comments in PHP
A comment in PHP code is a line that is not executed as a part of the program. Its only purpose is to be read by someone who is looking at the code.

Comments can be used to:

Let others understand your code
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
Leave out some parts of your code
PHP supports several ways of commenting:

Example
Syntax for comments in PHP code:

Code Select Expand

// This is a single-line comment

# This is also a single-line comment

/* This is a
multi-line comment */
Single Line Comments
Single line comments start with //.

Any text between // and the end of the line will be ignored (will not be executed).

You can also use # for single line comments, but in this tutorial we will use //.


Comments to Ignore Code
We can use comments to prevent code lines from being executed:

Example
Do not display a welcome message:

Code Select Expand

// echo "Welcome Home!";