How can the nl2br() function be reversed to display line breaks as new lines within a <textarea> element?

The nl2br() function in PHP converts newline characters to HTML line breaks, which is useful for displaying text with line breaks in HTML elements. However, when displaying text with line breaks within a <textarea> element, we need to reverse this conversion to ensure that the line breaks are displayed as new lines within the textarea. To achieve this, we can use the nl2br() function in combination with the str_replace() function to replace the HTML line breaks with newline characters before displaying the text within the <textarea> element.

$text_with_line_breaks = "This is a text with line breaks.<br>Line 1<br>Line 2";

// Reverse nl2br conversion for <textarea> element
$text_for_textarea = str_replace("<br>", "\n", $text_with_line_breaks);

echo "<textarea>$text_for_textarea</textarea>";