Single line

In PHP, single-line comments are used to add brief notes or explanations directly within the code. These comments are ignored by the PHP engine during execution and are purely for the benefit of developers reading the code. There are two syntaxes for single-line comments in PHP:

Using Double Slashes (//)

You can create a single-line comment using double slashes. Everything following the // on that line will be considered a comment.

<?php
// This is a single-line comment using double slashes
echo "Hello, World!"; // This comment is after a line of code
?>

Using a Hash Symbol (#)

You can also create a single-line comment using a hash symbol. Everything following the # on that line will be considered a comment.

<?php
# This is a single-line comment using a hash symbol
echo "Hello, World!"; # This comment is after a line of code
?>

Examples

Here are some examples demonstrating both types of single-line comments:

<?php
// This is a comment explaining the next line of code
echo "Hello, World!";
// You can also place a comment after a statement
echo "PHP is fun!"; // This is an inline comment
# This is a comment using the hash symbol
echo "Learning PHP!";
# Inline comment with hash symbol
echo "Another example"; # This is also an inline comment
?>

Using comments effectively can help make your code more readable and maintainable by providing context and explanations where necessary.