index.php

<!DOCTYPE html>
<html>
<head>
  <title>My First PHP Web Application</title>
</head>
<body>
  <h1>My First PHP Web Application</h1>
  <p>This is a simple web application that was created using PHP.</p>
  <?php
    // This is a PHP comment.
    echo "Hello, world!";
  ?>
</body>
</html>
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