Should PHP, HTML, and CSS be kept separate, or is it acceptable to store the entire HTML code in PHP variables?

Keeping PHP, HTML, and CSS separate is generally considered best practice for code organization and maintainability. Storing the entire HTML code in PHP variables can make the code harder to read and maintain, as well as potentially introducing security vulnerabilities if user input is not properly sanitized. It is recommended to use PHP to generate dynamic content within HTML templates, rather than storing entire HTML code blocks in PHP variables. 

<?php
// Separate PHP, HTML, and CSS example
?>
<!DOCTYPE html>
<html>
<head>
    <title>Example Page</title>
    <style>
        body {
            font-family: Arial, sans-serif;
        }
    </style>
</head>
<body>
    <h1>Welcome to our website!</h1>
    <?php
    // PHP code here to generate dynamic content
    ?>
</body>
</html>

Keywords

PHP HTML CSS separation variables

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