Are there any specific guidelines for formatting and styling HTML output within PHP scripts to ensure proper display?

When outputting HTML within PHP scripts, it is important to ensure proper formatting and styling to guarantee a visually appealing display. To achieve this, you can use PHP's `echo` or `print` functions to output HTML code. Additionally, you can include CSS styles directly within the HTML output or link to an external CSS file for styling.

<?php
echo "<html>";
echo "<head>";
echo "<style>";
echo "body { font-family: Arial, sans-serif; }";
echo "h1 { color: blue; }";
echo "</style>";
echo "</head>";
echo "<body>";
echo "<h1>Hello, World!</h1>";
echo "<p>This is a sample PHP script with styled HTML output.</p>";
echo "</body>";
echo "</html>";
?>