PHP Comments

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Code comments represent lines that the PHP interpreter skips during execution. They are used to:

  • Explain code to yourself or others
  • Disable code temporarily for debugging
  • Add notes or reminders
php-comments

Single-Line Comment

Use // or # to write a one-line comment.

 

<?php
// This is a single-line comment
# This is also a single-line comment
echo "Hello, world!";
?>

Multi-Line Comment

Use /* ... */ to write multiple lines of comment.

 

<?php
/*
  This is a multi-line comment.
  You can write multiple lines here.
*/
echo "PHP Comments Example";
?>

Example

<?php
// Declare a variable
$name = "Alice";

/* 
  Display the name.
  You can also format it differently.
*/
echo "Hello, $name!";  // Greet the user
?>
Run ›
notepad
  • Use comments to explain complex logic
  • Avoid over-commenting obvious code
  • Keep comments up-to-date with code changes
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