What are the best practices for structuring PHP code to avoid outputting broken HTML, especially when dealing with form tags?

When dealing with form tags in PHP code, it is important to ensure that the HTML output is properly structured to avoid broken HTML. One way to achieve this is by using PHP's control structures such as if statements to conditionally output the form tags. By structuring the code in this way, you can ensure that the form tags are only output when necessary, preventing any issues with broken HTML. 

<?php
// Check if form has been submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Process form data
    // Output success message
    echo "<p>Form submitted successfully!</p>";
} else {
    // Display the form
    ?>
    <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
        <input type="text" name="name" placeholder="Enter your name">
        <input type="email" name="email" placeholder="Enter your email">
        <button type="submit">Submit</button>
    </form>
    <?php
}
?>

Keywords

PHP HTML form tags validation escaping

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