How can individual text boxes be refreshed independently of the entire page using iFrames in PHP?

When using iFrames in PHP to display multiple text boxes on a page, you may want to refresh individual text boxes independently without refreshing the entire page. One way to achieve this is by using JavaScript to reload the iFrame content dynamically.

```php
<!-- HTML code with iFrames -->
<iframe id="iframe1" src="textbox1.php"></iframe>
<iframe id="iframe2" src="textbox2.php"></iframe>

<!-- JavaScript code to refresh individual text boxes -->
<script>
function refreshTextBox1() {
    document.getElementById('iframe1').src = document.getElementById('iframe1').src;
}

function refreshTextBox2() {
    document.getElementById('iframe2').src = document.getElementById('iframe2').src;
}
</script>
```

In this code snippet, we have two iFrames displaying text boxes from separate PHP files. The JavaScript functions `refreshTextBox1()` and `refreshTextBox2()` reload the content of the respective iFrames when called. This allows you to refresh individual text boxes independently of the entire page.