How can PHP developers ensure cross-browser compatibility when implementing text formatting changes?

To ensure cross-browser compatibility when implementing text formatting changes, PHP developers can use CSS for styling and ensure that the CSS properties used are supported by all major browsers. Additionally, they can use vendor prefixes for CSS properties that may not be fully supported across different browsers. Testing the changes on different browsers and devices can also help identify and resolve any compatibility issues.

<!DOCTYPE html>
<html>
<head>
    <style>
        p {
            font-family: Arial, sans-serif;
            font-size: 16px;
            color: #333;
        }
    </style>
</head>
<body>
    <p>This is a sample text with formatting changes.</p>
</body>
</html>