PHP Comments

PHP supports C, C++, and shell script style comments.
This is a C-style, multiline comment that might appear at the start of our PHP script  
/* Author: Bob Smith
   Last modified: April 10
   This script processes the customer orders.
*/
Multiline comments should begin with a /* and end with */. As in C, multiline comments cannot be nested.
You can also use single line comments, either in the C++ style     
echo "Order processed."; // Start printing order
or in the shell script style:      
echo "Order processed."; # Start printing order
With both of these styles, everything after the comment symbol (# or //) is a comment until we reach the end of the line or the ending PHP tag, whichever comes first.