PHP Comments

PHP comments can be used to describe any line of code so that other developer can understand the code easily. It can also be used to hide any code.

PHP supports single line and multi line comments. These comments are similar to C/C++ and Perl style (Unix shell style) comments.

PHP Single Line Comments

There are two ways to use single line comments in PHP.

• // (C++ style single line comment)
• # (Unix Shell style single line comment)

1. <?php  
2. // this is C++ style single line comment  
3. # this is Unix Shell style single line comment  
4. echo "Welcome to PHP single line comments";  
5. ?>  

Output:

Difference between JDK, JRE, and JVM

Welcome to PHP single line comments

PHP Multi Line Comments

In PHP, we can comments multiple lines also. To do so, we need to enclose all lines within /* */. Let's see a simple example of PHP multiple line comment.

1. <?php  
2. /* 
3. Anything placed 
4. within comment 
5. will not be displayed 
6. on the browser; 
7. */  
8. echo "Welcome to PHP multi line comment";  
9. ?>  

Output:

Welcome to PHP multi line comment