PHP Tutorial

A web server programming language.

Chapter Quiz Exercises
Course Topics
PHP Intro PHP Syntax PHP Variables PHP Echo / Print PHP Data Types PHP Strings PHP Numbers PHP Math PHP Constants PHP Operators PHP If...Else...Elseif PHP Switch PHP Loops PHP Functions PHP Arrays PHP Superglobals PHP Form Handling PHP Date and Time PHP File Handling PHP Cookies PHP Sessions PHP Exceptions PHP OOP Classes & Objects PHP Constructor MySQL Connect MySQL Insert Data MySQL Select Data PHP JSON PHP Regular Expressions PHP Include & Require

PHP Syntax

PHP Syntax

A PHP script is executed on the server, and the plain HTML result is sent back to the browser.

A PHP script starts with <?php and ends with ?>.

Example:

<?php
// PHP code goes here
echo "Hello World!";
?>

Case Sensitivity: In PHP, keywords (e.g. if, else, while, echo, etc.), classes, functions, and user-defined functions are NOT case-sensitive. However, all variable names are case-sensitive!

Try It Yourself

Edit the code below and click Run to see the result live.

Source Code
Result
Topics
PHP Intro PHP Syntax PHP Variables PHP Echo / Print PHP Data Types PHP Strings PHP Numbers PHP Math PHP Constants PHP Operators PHP If...Else...Elseif PHP Switch PHP Loops PHP Functions PHP Arrays PHP Superglobals PHP Form Handling PHP Date and Time PHP File Handling PHP Cookies PHP Sessions PHP Exceptions PHP OOP Classes & Objects PHP Constructor MySQL Connect MySQL Insert Data MySQL Select Data PHP JSON PHP Regular Expressions PHP Include & Require