PHP Comments

PHP comment are used to explain the code and make it more ready by human. Comments are ignored by the PHP engine so they have no effect on the execution of the code. PHP supports several types of comments:

Single-line PHP Comment

Single-line comments are used to add a comment on a single line. There are two syntaxes for single-line comments:

Double Slash (//): Any text after // on the same line is considered a comment.

<?php
// This is a single-line comment
echo "Hello, World! Sakala Code";
?>

Hash (#): Any text after # on the same line is considered a comment.

<?php
# This is also a single-line comment
echo "Hello, World! Sakala Code";
?>

Multi-line PHP Comment

The syntax for multi-line comments is as follows:

<?php
/*
This is a multi-line comment.
It can span multiple lines.
*/
echo "Hello, World! Sakala Code";
?>

Inline php Comments

php Comments can also be added at the end of a line of code. This can be useful for explaining a specific line of code.

<?php
$variable = "Hello"; // This is an inline comment
echo $variable; # This is also an inline comment
?>

Best Practices for Using comments in php

Clarity: Use comments to explain the purpose of the code, especially if the logic is complex or not immediately obvious.
Maintainability: Keep comments up-to-date with the code. Outdated comments can be misleading.
Readability: Avoid over-commenting.
Self-Documenting Code: Strive to write code that is clear and understandable on its own, using comments to supplement where necessary.

Example with Different Comment Types

<?php
// This is a single-line comment

# This is another single-line comment

/*
This is a multi-line comment.
It provides more detailed explanations
or notes that span multiple lines.
*/

$greeting = "Hello, World!"; // Inline comment explaining the variable

echo $greeting; # Inline comment explaining the echo statement
?>

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