Are there any specific CSS properties or values that should be avoided in PHP development to ensure cross-browser compatibility?

When developing PHP applications, it is important to avoid using vendor-specific CSS properties or values that may not be supported across all browsers. To ensure cross-browser compatibility, stick to using standard CSS properties and values that are widely supported.

echo '<style>
    .example {
        color: black;
        background-color: white;
        font-size: 16px;
    }
</style>';