What are the best practices for addressing HTML/CSS issues that may be causing discrepancies in PHP application behavior across browsers?

Issue: HTML/CSS discrepancies can cause PHP applications to behave differently across browsers. To address this, it is important to ensure that the HTML and CSS code is properly structured and follows best practices for cross-browser compatibility. PHP Code Snippet: 

<!DOCTYPE html>
<html>
<head>
    <title>PHP Application</title>
    <style>
        /* CSS code here */
        body {
            font-family: Arial, sans-serif;
            background-color: #f0f0f0;
        }
    </style>
</head>
<body>
    <?php
    // PHP code here
    echo "<h1>Welcome to our PHP application!</h1>";
    ?>
</body>
</html>

Keywords

HTML CSS browser compatibility PHP application troubleshooting

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