Age verifcation on Index page for adult site... like pornotube.com

Hello friends,

I am looking for a script or code to put it on a index page of adult site that asks for visitors age.

I dont want this in HTML so that user has to go thru this every time.. i want it to
set a cookie if user has already entered his/her age... once he dont have to do it again..


Very good example of this is Pornotube.com

can anyone help me with this please

 

<?php

$verified = false;

if ($_POST['verify'])
{
	extract(array_map('intval', $_POST));
	
	if (!checkdate($month, $day, $year))
	{
		exit('Invalid birthday.');
	}
	
	$now = mktime(0, 0, 0);
	$birthday = mktime(0, 0, 0, $month, $day, $year);
	$age = intval(($now - $birthday) / (3600 * 24 * 365));

	if ($age >= 18)
	{
		setcookie('age_verified', 1, time()+3600*24*7, '/');
		$verified = true;
	}
	else
	{
		echo 'Sorry, you are too young.';
	}
}


?>

<?php

if (isset($_COOKIE['age_verified']) OR $verified)
{
	// Page content
}
else
{
?>
<form action="" method="post">
<select name="day">
<option>Day</option>

<?php
	
for ($day = 1; $day <= 31; $day++)
{
	echo "\t". '<option value="'. $day .'">'. $day ."</option>\n";
}
?>
</select>

<select name="month">
<option>Month</option>

<?php
	
for ($month = 1; $month <= 12; $month++)
{
	echo "\t". '<option value="'. $month .'">'. $month ."</option>\n";
}
?>
</select>


<select name="year">
<option>Year</option>
<?php
	
for ($year = date('Y')-80; $year <= date('Y'); $year++)
{
	echo "\t". '<option value="'. $year .'">'. $year ."</option>\n";
}
?>
</select>

<input type="submit" name="verify" value="Submit" />
</form>


<?php
}
?>

PHP:

 

thanks buddy.

will this redirect too the url which was entered? for example

if user entered www.mysite.com/someotherpage.htm will this direct to it?