In what scenarios would it be recommended to test the nl2br function in PHP before implementing it in a production environment?

The nl2br function in PHP is used to insert HTML line breaks before all newlines in a string. It is recommended to test the nl2br function before implementing it in a production environment to ensure that it behaves as expected and does not introduce any unexpected formatting issues. Testing the function with various types of input data can help identify any potential edge cases or bugs that need to be addressed before deploying it to a live system.

// Test the nl2br function before implementing in production
$text = "This is a test\nof the nl2br function";
$converted_text = nl2br($text);

echo $converted_text;