What are the potential compatibility issues between Firefox and IE8 when using buttons with images in PHP?

Potential compatibility issues between Firefox and IE8 when using buttons with images in PHP may arise from differences in how the browsers handle CSS and HTML rendering. To solve this issue, it is recommended to use CSS to style the buttons consistently across different browsers. This can be achieved by setting the background image for the button and adjusting the padding and margins to ensure proper alignment.

<button class="image-button">Click me</button>

<style>
.image-button {
    background-image: url('button-image.png');
    background-size: cover;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
}
</style>