How can nl2br be used to replace line breaks with <br> tags in PHP?

To replace line breaks with <br> tags in PHP, you can use the nl2br() function. This function takes a string as input and replaces all newline characters with <br> tags. This is useful when displaying text that contains line breaks in HTML format.

```php
$text = &quot;This is a text with
line breaks.&quot;;
echo nl2br($text);
```

In the above code snippet, the variable $text contains a string with line breaks. The nl2br() function is then used to replace the line breaks with &lt;br&gt; tags when the text is echoed.