What are the drawbacks of using frames in PHP for managing page content reloading?

Using frames in PHP for managing page content reloading can lead to issues such as SEO problems, accessibility concerns, and difficulties in maintaining and updating the code. To solve this, it is recommended to use AJAX (Asynchronous JavaScript and XML) to dynamically load content without the need for frames.

// Example PHP code snippet using AJAX for dynamically loading content

<div id="content"></div>

<script>
function loadContent(url) {
  var xhttp = new XMLHttpRequest();
  xhttp.onreadystatechange = function() {
    if (this.readyState == 4 && this.status == 200) {
      document.getElementById("content").innerHTML = this.responseText;
    }
  };
  xhttp.open("GET", url, true);
  xhttp.send();
}

// Example usage
loadContent("page.php");
</script>