PHP - ¿como se pone taget="_blank" en PHP?

<?php

session_start();

$metatitle = "Author Profile - ";

include('../config.php');

include('security.php');

// Initial DB Connect (Can't use header)

	$query = 'select * from authors '

			 ."where username ='".$_SESSION['valid_user']."'";

	$result = mysql_query($query,$connection) or die(mysql_error());

	//Create user data variables

	$info = mysql_fetch_array($result);

	$id = $info['id'];

	$username = $info['username'];

	$password = $info['password'];

	$url = $info['url'];

	$fname = htmlspecialchars($info['fname']);

	$email = htmlspecialchars($info['email']);

	$displayname = htmlspecialchars($info['displayname']);

	$bio = addslashes($info['bio']);

	$gravatar = $info['gravatar'];

	$mailopt = $info['mailopt']; //0 == checked

// Update the settings

if(isset($_POST['profileupdate'])) {

	if(get_magic_quotes_gpc()) {

		$updatedisplay = $_POST['displayname'];

		$updateurl = $_POST['url'];

		$updatebio = $_POST['bio'];

	} else {

		$updatedisplay = mysql_real_escape_string($_POST['displayname']);

		$updateurl = mysql_real_escape_string($_POST['url']);

		$updatebio = mysql_real_escape_string($_POST['bio']);

	}

	$sql = "UPDATE `authors` SET `displayname`='".$updatedisplay."', `url`='".$updateurl."', `bio`='".$updatebio."' WHERE `id`=".$id;

			$query = mysql_query($sql);

			header('Location: profile.php?profileupdate=true');

			exit();

}

include('header.php'); ?>

<!-- LEFT SIDEBAR -->

<?php include('../sidebar.php');

// Call the top area of the author template

	$authortop = new Template("../templates/".$template."/author-top.tpl");

	// Outputs the page template!

	echo $authortop->output();

?>

<h1>Update Your Author Profile</h1>

<br/>

<!-- Confirmations -->

<?php if($_GET["profileupdate"] == "true") {

	echo '<div class="alert" style="text-align: center;"><b>Settings updated!</b></div>';

}

?>

<table>

<tr><td valign="top" style=" padding:0 10px 0 0px; border-right: 3px solid #F3F1E9;">

<form method="post" action="profile.php">

<table><tr><td style="width:150px;">Pen Name:</td>

<td><input type="text" name="displayname" value="<?php echo $displayname; ?>" style="width: 250px;"></td></tr>

<tr><td>Homepage:</td>

<td><input type="text" name="url" value="<?php echo $url; ?>" style="width: 250px;"></td></tr>

<tr><td><br/>Bio:</td>

<td><br/><textarea name="bio" style="width: 200px; height: 220px;"><?php echo $bio; ?></textarea></td></tr>

<tr><td colspan="2" align="center">

<br/><input type="submit" value="Update" id="submitstyle"></td></tr>

<input name="profileupdate" type="hidden" id="profileupdate" />

</table></form>

</td>

<td style="padding:0 0 0 20px;" valign="top">

<p><b>Avatar:</b><br/><br/>

<img style="border:2px solid #999; margin: 6px 6px 8px 0; float: left;" src="<?php echo $gravatar; ?>" /><div style="clear:both"></div>This site uses Gravatars - global avatars tied to your email address. To learn more about Gravatars, or to update your image, visit <a href="http://gravatar.com">Gravatar.com</a> and register with the email address you use to access this site. Your image will be updated across this site.</p>

</td></tr></table>

<br/>

<div style="clear:both; width: 100%; padding-top: 15px; border-bottom: 3px solid #F3F1E9;"></div>

<?php

// Call the bottom area of the author template

	$authorbottom = new Template("../templates/".$template."/author-bottom.tpl");

	// Outputs the page template!

	echo $authorbottom->output();

 include('../obinclude.php'); ?>

<a href="http://gravatar.com">

<td><input type="text" name="url" value="<?php echo $url; ?>" style="width: 250px;"></td></tr>

<a href="http://gravatar.com">

<td><input type="text" name="url" value="<?php echo $url; ?>" style="width: 250px;"></td></tr>

<td><input type="text" name="url" value="<?php echo $url; ?>" style="width: 250px;"></td></tr>