Comments in PHP : Tutorial

Comments in PHP are text contents which are ignored by the interpreter.

Comments are usually added with the purpose of making the source code easier to understand for someone who is reading it. PHP supports C,C++,Java,Perl and Unix style comments.

In PHP we have 3 kinds of Comments,

    1. Single line Comments. (//)
    2. Multi-line Comments. (/* */)
    3. Single line Shell/Perl like comments. (#)

1. Single line Comments. (//)

Single-line comments starts with // and cannot span across multiple lines.

<html>
<head>
 <body>
  <h1>
  <?php 
  	
     echo "Hello there!"; //This is an example of Single line comment.
     
  ?>
  </h1>
 </body>
</html>

Output
	

Hello there!

2. Multiline Comments. (**/* */**)

Multi-line comments starts with /* and ends with */ and can span across multiple lines.

<html>
<head>
 <body>
  <h1>
  <?php 
  
  /*This is
  an example of
  Multi line comments
  in PHP.*/
     
  echo "Hello there!"; 
     
  ?>
  </h1>
 </body>
</html>

Output
	

Hello there!

3. Shell/Perl Style single line Comments. (#)

These kind of comments start with # and cannot span across multiple lines.

<html>
<head>
 <body>
  <h1>
  <?php 
     
  echo "Hello there!"; #Perl/Shell style Single line comments.
     
  ?>
  </h1>
 </body>
</html>

Output
	

Hello there!

Comments in PHP : Tutorial

1. Single line Comments. (//)

2. Multiline Comments. (/* */)

3. Shell/Perl Style single line Comments. (#)

2. Multiline Comments. (**/* */**)