Ajax Bible
There are three types of comments in PHP. The first kind is similar to the one-line comments found in JavaScript, and starts with //:
<html> <head> <title> Using the echo statement </title> </head> <body> <h1> Using the echo statement </h1> <? //Send text back to the browser. echo "Greetings from PHP."; ?> </body> </html>
In PHP, you can also use the # symbol in place of //:
<html> <head> <title> Using the echo statement </title> </head> <body> <h1> Using the echo statement </h1> <? #Send text back to the browser. echo "Greetings from PHP."; ?> </body> </html>
You can also use multi-line comments as well. Multi-line comments start with /* and continue until a */ is encountered. Here’s an example:
<html> <head> <title> Using the echo statement </title> </head> <body> <h1> Using the echo statement </h1> <? /* This code sends the text "Greetings from PHP." back to the browser. */ echo "Greetings from PHP."; ?> </body> </html>
Now it’s time to start looking at how to work with variables in PHP.