<?php
$html = array( 'textinput' => htmlentities($_POST['textinput']), 
'nameinput' => htmlentities($_POST['nameinput']) );
$nameinput = $_POST['nameinput'];
$textinput = $_POST['textinput'];
$today = date("m.d.y, g:i a");  // example 03.10.01, 5:16 pm
echo "Valid User Agent Messages:" . "<br />" . "<br />";
  if ( $_SERVER['HTTP_USER_AGENT'] == 'useragentname' ) {      // if User Agent matches      
          // logs into database
      mysql_connect ("localhost", "username", "password") or die ('Error: ' . mysql_error() ); 
          mysql_select_db ("databasename");            // opens the database  
          $query="INSERT INTO InputTable (name,text,date) VALUES ('$_POST[nameinput]','$_POST[textinput]','$today')";                                              
          echo $textinput . "<br />";        // echos input message
      $SQL = "SELECT * FROM TableName";       // pulls previous messages from sql table
      $result = mysql_query($SQL);
        while ($row = mysql_fetch_array($result)) {
            // echos messages from column in table
                        echo $row['name'] . ": " . $row['text'] . " " . $row['date'] . "<br />";           
            }
            echo " ";
            // kills mysql connect
                        mysql_query($query) or die (' :: Error sending message.');                         
            }
  else {
      echo "Error: Wrong User Agent."; 
  }
?>