<b>Valid User Agent</b><p></p>
<form action="useragentinput.php" method="post">
<i>Must have a valid User Agent in order to send message.</i><p>
Name:<br>
<input type="text" name="nameinput" maxlength="20" style="width: 45%;" value=" " /><br>
Message:<br>
<input type="text" name="textinput" maxlength="100" style="width: 100%;" value=" " />
<p></p>
<input type="submit" name="Submit" value="Submit" /><input type="reset" name="ClearInput" value="Clear" />
<p></p>
Current User Agent:<p></p>
<?php 
$html = array( 'textinput' => htmlentities($_POST['textinput']), 
'nameinput' => htmlentities($_POST['nameinput']) );
$nameinput = $_POST['nameinput'];
$textinput = $_POST['textinput'];
echo $_SERVER['HTTP_USER_AGENT'];
?> 
</form>