<!-- This is an HTML Comment -->
PHP Comment Syntax: Single Line Comment
While there is only one type of comment in HTML, PHP has two types. The first type we will discuss is the single line comment. The single line comment tells the interpreter to ignore everything that occurs on that line to the right of the comment. To do a single line comment type “//” or “#” and all text to the right will be ignored by PHP interpreter.
<?php echo "Hello World!"; // This will print out Hello World! echo "<br />Psst...You can't see my PHP comments!"; // echo "nothing"; // echo "My name is Humperdinkle!"; # echo "I don't do anything either"; ?>
Psst…You can’t see my PHP comments!
Notice that a couple of our echo statements were not evaluated because we commented them out with the single line comment. This type of line commenting is often used for quick notes about complex and confusing code or to temporarily remove a line of PHP code.
PHP Comment Syntax: Multiple Line Comment
Similiar to the HTML comment, the multi-line PHP comment can be used to comment out large blocks of code or writing multiple line comments. The multiple line PHP comment begins with ” /* ” and ends with ” */ “.
<?php /* This Echo statement will print out my message to the the place in which I reside on. In other words, the World. */ echo "Hello World!"; /* echo "My name is Humperdinkle!"; echo "No way! My name is Uber PHP Programmer!"; */ ?>