textarea post fetch problem

Problem in fetching data from text area....
When i enter some text in textarea like:

Hi
this is text message
thanks

but i try to fetch it using post method i get this text in one line.. how can i fix it it?

ere is my code
thank you

if(isset($_POST["submit"]))
{		
	echo $_POST["shortDesc"];
	exit;
}

PHP:

<textarea name="shortDesc" cols="60" rows="4" id="shortDesc"></textarea>
<br/>
<input name="submit" type="submit" id="submit" value="  Submit  " />

Code (markup):

 

change this echo $_POST["shortDesc"]; to
echo nl2br($_POST["shortDesc"]);
it will convert linebreaks to <br>

 

i think the best thinge for that is

    echo  preg_replace( "#\n#si", '<br>',$_POST["shortDesc"]);

PHP:

 

why do you need to use preg_replace if PHP have an easy built-in function can do this with 5 characters