What are the advantages and disadvantages of using frames in PHP websites?

Using frames in PHP websites can help in organizing and structuring the content of the website by dividing it into separate sections. This can make it easier to manage and update specific parts of the website. However, frames can also cause issues with search engine optimization as search engines may have difficulty indexing the content within frames. Additionally, frames can present accessibility challenges for users with disabilities who rely on screen readers.

<!-- Example of using frames in PHP -->
<html>
<head>
    <title>Using Frames</title>
</head>
<frameset cols="25%,75%">
    <frame src="menu.php" name="menu">
    <frame src="content.php" name="content">
</frameset>
</html>