What are the potential pitfalls of using absolute size measurements in PHP for web development?

Using absolute size measurements in PHP for web development can lead to issues with responsiveness across different devices and screen sizes. To solve this problem, it is recommended to use relative size measurements like percentages or viewport units (vw, vh) to ensure that elements on the webpage scale appropriately.

<style>
    .container {
        width: 80%; /* Use percentage for flexible layout */
        margin: 0 auto; /* Center the container */
    }

    .box {
        width: 50%; /* Use percentage for flexible sizing */
        padding: 20px;
        margin-bottom: 20px;
        background-color: #f0f0f0;
    }
</style>

<div class="container">
    <div class="box">Box 1</div>
    <div class="box">Box 2</div>
    <div class="box">Box 3</div>
</div>