Preg_replace but very hard

[vbzoom_com]

How can I replace new lines ("\r\n") with "<BR>" except any new lines that between [textarea] and [/textarea]

for exmaple replace:

---

That
is
new
code
[textarea]
Any
code
here
[/textarea]

---

Replace it with

---

That <br>
is <br>
new <br>
code <br>
[textarea]
Any
code
here
[/textarea]

---

[victordb]

You could probably use if statements