What are the drawbacks of using framesets in PHP development and what alternatives are recommended?

Using framesets in PHP development can lead to issues such as poor accessibility, SEO problems, and difficulty in maintaining and updating the code. It is recommended to use modern HTML and CSS techniques like flexbox or grid layout for creating responsive and dynamic layouts.

<!DOCTYPE html>
<html>
<head>
    <title>Using CSS Grid for Layout</title>
    <style>
        .grid-container {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            grid-gap: 10px;
        }
        .grid-item {
            background-color: #f2f2f2;
            padding: 20px;
            text-align: center;
        }
    </style>
</head>
<body>
    <div class="grid-container">
        <div class="grid-item">Item 1</div>
        <div class="grid-item">Item 2</div>
        <div class="grid-item">Item 3</div>
    </div>
</body>
</html>