In what situations would using nl2br() be more efficient than manually replacing line break characters in PHP output?

Using nl2br() would be more efficient than manually replacing line break characters in PHP output when you want to convert newline characters (\n) to HTML line breaks (<br>) in a string. nl2br() is a built-in PHP function specifically designed for this purpose, making the code cleaner and more readable. It also saves you from having to write custom code to handle different types of line break characters.

// Using nl2br() function to convert newline characters to HTML line breaks
$text = "Hello\nWorld!";
echo nl2br($text);