What is PHP - W3school | Tutorialspoint

PHP Hypertext Preprocessor (PHP) is a server side scripting language, and a powerful tool for making dynamic and interactive Web pages. PHP runs on varioud platform like Linux, Windows, Unix, Mac OS X, etc also PHP supports wide range of database like Mysql, MongoDB, SQL etc. PHP is a open-source programming language and free for download www.php.net.

<html>
   <head>
      <title>My First PHP Page</title>      
   </head>
   
   <body>
      
      <?php
         echo "<h1>Hello, World!</h1>";
      ?>
   
   </body>
</html>