How does the nl2br function in PHP work and what should be considered when using it in conjunction with other functions?

The nl2br function in PHP converts newline characters (\n) into HTML line breaks (<br>). When using nl2br in conjunction with other functions, it's important to consider the order of operations to ensure the desired output. For example, if you want to apply nl2br after processing some text with another function, make sure to call nl2br last to avoid unexpected results.

$text = "Hello\nWorld";
$text = someFunction($text); // Process the text with another function
$text = nl2br($text); // Convert newline characters to HTML line breaks
echo $text;