convert new line (in textarea) to br tag using javascript and php

[-------------------------------- using javascript ------------------------------ ]

var str = document.getElementById("heading_description").value;
var res = str.replace(/\n/g, '<br />');
document.getElementById("your_id").value=res;

[-------------------------------- using PHP ------------------------------- ]
<?php
function nl2br2($string) {
$string = str_replace(array("\r\n", "\r", "\n"), "<br />", $string);
echo $string;
}

$data="

sdfdsf

sdf
sdfds
fsdf

";

nl2br2($data);
?> 

create daily folder under every month of folder under every year folder using php

$fodler_array=array(date("Y"), date("m"), date("d"));

foreach($fodler_array as $data)
{
if(!is_dir("assets/".$data))
{
echo '<br />';
mkdir("assets/".$data);
echo 'folder created in assest'.$data;
}
else
{
echo 'folder all ready exits<br />';
}
}

Find browser name using php

<?php
$browser="";
     if(strpos(strtolower($_SERVER["HTTP_USER_AGENT"]),strtolower("MSIE"))){$browser="ie";}
else if(strpos(strtolower($_SERVER["HTTP_USER_AGENT"]),strtolower("Presto"))){$browser="opera";}
else if(strpos(strtolower($_SERVER["HTTP_USER_AGENT"]),strtolower("CHROME"))){$browser="chrome";}
else if(strpos(strtolower($_SERVER["HTTP_USER_AGENT"]),strtolower("SAFARI"))){$browser="safari";}
else if(strpos(strtolower($_SERVER["HTTP_USER_AGENT"]),strtolower("FIREFOX"))){$browser="firefox";}
else {$browser="other";}
echo $browser;
?>