How to use comments in PHP code?

@rollin 

In PHP, comments can be used to make notes within the code that are not executed by the interpreter. This is useful for leaving reminders or explanations for yourself or other developers who might be working on the same code in the future.

There are two types of comments in PHP: single-line comments and multi-line comments.

Single-line comments begin with two forward slashes (//) and continue until the end of the line. For example:

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// This is a single-line comment
echo "Hello World!";

Multi-line comments start with /* and end with */. They can span multiple lines and are often used for longer explanations or for temporarily disabling blocks of code. For example:

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/* This is a multi-line comment
   that spans multiple lines */
echo "Hello World!";

It's important to note that comments are ignored by the PHP interpreter and do not affect the execution of the code. However, they can make your code more readable and easier to understand for you and others who might read your code in the future.

@rollin 

Here are a few examples of how you can use comments in PHP code:

1. Explanation of code: // This variable holds the user's name $name = "John Doe"; // Display a personalized greeting echo "Hello, " . $name;
2. Reminder for future development: // TODO: Add validation for input fields
3. Disabled code: /* // This code is currently disabled $price = 10.99; $taxRate = 0.2; $total = $price + ($price * $taxRate); echo "Total: $" . $total; */

Remember to use comments judiciously to enhance the readability and maintainability of your code.