Php Comments

Developers use comments to describe the details of the code. In PHP there is three-way to describe the comments.

Shell Method

this method is used to single-line comment and it is used through # to comment the details.


<?php
# describe about code details
?>

Example:- Suppose, You created user_greetings function in the user file.


<?php

# user file

function user_greetings($name){

	return 'Hello '.$name;
}
echo user_greetings('John');
?>
Output:- Hello John

Try it Yourself

Single-line Comment

It is basically used for single-line comment and it works the same as the shell method. this method is copied from the c language.

Syntax:-


<?php
 // describe about code details
?>

Example:- Suppose, You created user_full_name function in the user file.


<?php
// get user full name function

function user_full_name($first_name,$last_name){

	return $first_name.' '.$last_name;
}

echo user_full_name('John','Taylor');
?>
Output:- John Taylor

Try it Yourself

Multi-line Comment

this method is used to comments for multiple lines. this method is copied from the c++ language.

Syntax:-


<?php
 /* 
describe 
about 
code details
*/
?>

Example:- Suppose, You created sum of nunbers in the user file and you defined multi-line comments for number1 and number2 .


<?php
/*
$number1=10
$number2=20;
*/
$number3=30;
$number4=40;

$sum_of_numbers=$number3+$number4;

echo $sum_of_numbers;
?>
Output:- 70

Try it Yourself

Php Comments – Interview Questions

Q 1: What are comments in PHP?

Ans: Comments are non-executable statements used to explain code.

Q 2: Types of comments in PHP?

Ans: Single-line (//, #) and multi-line (/* */).

Q 3: Are comments executed by PHP?

Ans: No, comments are ignored by the PHP interpreter.

Q 4: Why are comments important?

Ans: They improve code readability and maintenance.

Q 5: Can comments be written inside functions?

Ans: Yes.

Php Comments – Objective Questions (MCQs)

Q1. Single-line comments in PHP start with ______.






Q2. Multi-line comments in PHP are written as ______.






Q3. Comments in PHP are used to ______.






Q4. Which comment style is NOT valid in PHP?






Q5. Multi-line comments can span ______.






Related Php Comments Topics