testing v2

<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8"/>
<meta name="author" content="RieqyNS13"/>
<meta name="updater" content="C4Hy4"/>
<title>Testing</title>
<style type="text/css">
body{
  background-color:#000000;
}
textarea{
  background-color:#000000;
  color:#FF0000;
}
input{
  background-color:#000000;
  color:#FF0000;
}
fieldset{
  color:#7FFF00;
  font-family:"Courier New";
  font-size:10px;
  border:1px solid;
  width:373px;
}
</style>
</head>
<body>
<br>
<form method=POST action=<?PHP $_SERVER['PHP_SELF'];?>>
<fieldset>
<legend>Isi Input</legend>
<textarea name="txArea" cols=50 rows=20 value="<?php echo isset($_POST['txArea'])?$_POST['txArea']:"";?>"></textarea>
</fieldset>
<input type=submit name="btnSubmit" value="Generate"><br>
<?php
$result = '';
if (isset($_POST['txArea'])){
  $str = $_POST['txArea'];
  $exp = explode("\n", $str);
  $count = count($exp);
  for($i=0; $i<$count; $i++){
    $result .= "Hello ".preg_replace('/(\s|\\\\[rn]{1})/', '',$exp[$i])." Problem ? \n";
  }
  echo "<fieldset><legend>Output :</legend>\n<textarea name='txResult' cols=50 rows=20 readonly=YES>$result</textarea></fieldset><br>";
}
?>
</form>
</body>
</html>