YA: Simple Content Form WOC

<?php
/*    In response to a Yahoo Answer's Question    */
// http://pastebin.com/2LHNNsqn  Same Script With Comments


/*    Message Functions    */
function errorMsg($msg){
    if(is_array($msg)){
        $r = '<table>';
        foreach($msg as $m){
            $r .= '<tr><td style="color: #900;font-weight: bold;">' . $m . '</td></tr>' . PHP_EOL;
        }
        return $r . '</table>';
    }else{
        return '<table><tr><td style="color: #900;font-weight: bold;">' . $msg . '</td></tr></table>';
    }
}
function goodMsg($msg){
    return '<table><tr><td style="color: #090;font-weight: bold;">' . $msg . '</td></tr></table>';
}

/*    Variables    */
$output = '';
$title = $_POST['title'];
$content = $_POST['content'];
$category = $_POST['category'];
$form = <<<FORM
<form action="./test.php" method="post" style="background-color: #000;">
    <table>
        <tr>
            <td><font color="white"><b>Title:</b></font></td>
            <td><input type="text" name="title" value="$title"></td>
        </tr>
        <tr>
            <td><font color="white"><b>Content:</b></font></td>
            <td><textarea name="content" rows="6" col="80">$content</textarea></td>
        </tr>
        <tr>
            <td><font color="white"><b>Category</b></font></td>
            <td>
            <select name="category">
                <option value="General Discussion">General Discussion</option>
                <option value="Suggestions">Suggestions</option>
                <option value="Complaints">Complaints</option>
                <option value="Problem Reporting">Problem Reporting</option>
            </select>
            </td>
        </tr>
        <tr>
            <td colspan="2"><input type="submit" name="postbtn" value="Post"></td>
        </tr>
    </table>
</form>
FORM;

/*    Logged In Check    */
$username = $_COOKIE['username'];
$userid = $_COOKIE['userid'];
if( !$username || !$userid){
    header('Refresh: 5; url=/login/login.php');
    echo errorMsg('You need to be logged in to access this page. <a href="/login/login.php" >Login</a>');
    exit;
}

/*    Form Checking And Processing    */

if ($_POST['postbtn']){
    $currenttime = date("h:i A");
    $currentdate = date("F d, Y");
    $errors = Array();

    /*    Error Checking    */
    if ((strlen($title) < 10) || (strlen($title) > 50)){
        $errors[] = 'Title must be longer than 10 and less than 50 characters';
    }
    if ((strlen($content) < 50) || (strlen($content) > 1000)){
        $errors[] = 'Content must be longer than 50 and less than 1000 characters';
    }
    if( count($errors) > 0){
        $output = errorMsg($errors) . $form;
    }else{
        require ("connect.php");
        $title = mysql_real_escape_string( $title );
        $content = mysql_real_escape_string( $content );
        $category = mysql_real_escape_string( $category );
        $query = mysql_query("SELECT id FROM posts WHERE title='$title' LIMIT 1");
        if ($query && mysql_num_rows($query) === 0){
            if( mysql_query("INSERT INTO posts (title, content, time, date, author, category) VALUES ('$title', '$content', '$currenttime', 'on $currentdate', '$username', '$category')") ){
                header('Refresh: 5; url=./posts.php?title=' . $title);
                $output = goodMsg('Your message was posted successfully.<br>If you are not redirected to the post in 5 seconds. Click the link below.<br> <a href="">' . $title . '</a>');
            }else{
                $output = errorMsg('There was an Internal Error, while attempting to save your post. Please try again in a few minutes.') . $form;
            }
        }else{
            $output = errorMsg('There is already a post with that Title, please select another.') . $form;
        }
        // mysql_close($conn);
    }
}else{
    $output = $form;
}
echo $output;
?>