What are some best practices for structuring PHP code to avoid invalid HTML output?

When structuring PHP code to avoid invalid HTML output, it is important to properly separate PHP logic from HTML markup. One common best practice is to use PHP's control structures, such as if statements and loops, to dynamically generate HTML content. Additionally, utilizing functions to encapsulate reusable code can help ensure consistent and valid HTML output. 

<?php
// Example of structuring PHP code to avoid invalid HTML output

// Define a function to generate HTML content
function generateContent($data) {
    $html = '<ul>';
    foreach ($data as $item) {
        $html .= '<li>' . $item . '</li>';
    }
    $html .= '</ul>';
    return $html;
}

// Example data
$data = ['Item 1', 'Item 2', 'Item 3'];

// Output the generated HTML content
echo generateContent($data);
?>

Keywords

HTML output PHP code structure sanitization validation escaping

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