Membuat contact form tanpa plugin

mau nanya, saya mau buat form kontak tapi tidak pakai plugin. alasannya karna supaya sama tampilannya dengan form kontak di theme html-nya.

saya cukup kesulitan dalam hal pengelompokan variable untuk error-nya.

ini kode saya,

<?php
/*
	Template Name: Contact
*/
?>

<?php
if(isset($_POST['submitted'])) {

        if(trim($_POST['contactName']) === '') {
                $nameError = 'Please enter your name.';
                $hasError = true;
        } else {
                $name = trim($_POST['contactName']);
        }

        if(trim($_POST['contactEmail']) === '') {
                $emailError = 'Please check your email.';
                $hasError = true;
        } else if (!eregi("/^<a href="http://codex.wordpress.org/:alnum:">:alnum:</a>[a-z0-9_.-]*@[a-z0-9.-]+\.[a-z]{2,4}$/i", trim($_POST['contactEmail']))) {
                $emailError = 'Please check your email.';
                $hasError = true;
        } else {
                $email = trim($_POST['contactEmail']);
        }

        if(trim($_POST['contactMessage']) === '') {
                $messageError = 'Please check your message.';
                $hasError = true;
        } else {
                if(function_exists('stripslashes')) {
                        $message = stripslashes(trim($_POST['contactMessage']));
                } else {
                        $message = trim($_POST['contactMessage']);
                }
        }

    if(!isset($hasError)) {
        $emailTo = get_option('tz_email');
        if (!isset($emailTo) || ($emailTo == '') ) {
                $emailTo = get_option('admin_email');
        }

        $subject = '[PHP Snippets] From '.$name;
        $body = "Name: $name \n\nEmail: $email \n\nMessage: $message";
        $headers = 'From: '.$name.' <'.$emailTo.'>' . "\r\n" . 'Reply_To: ' .$email;

        wp_mail($emailTo, $subject, $body, $headers);
        $emailSent = true;

     }

} ?>

<?php get_header(); ?>
<div id="subheader">
    		<div class="container">
    	  	<div class="row">
          		<div class="span12">
            		<h1><?php print the_title(); ?></h1>
                	<span><?php print the_excerpt(); ?></span>
           	 	</div>
         	</div>
    		</div>
	</div>

<?php get_sidebar('contact'); ?>

<div id="content">
    	<div class="container">
    	<?php if (have_posts()) : while (have_posts()) : the_post(); ?>
        	<div class="row">
            	<div class="span8">

              		<?php the_content(); ?>
               <div class="contact_form_holder">
              	<form id="contact" class="row" name="form1" method="post" action="<?php the_permalink(); ?>">

       			<div class="span4">
               		<label>Name</label>
           		<input type="text" class="full" name="contactName" id="contactName" value="<?php if(isset($_POST['contactName'])) echo $_POST['contactName']; ?>"/>
           		<?php if($nameError != '') { ?>
           		      <span class="error"><?=$nameError; ?></span>
           		<?php } ?>
           		</div>

                	<div class="span4">
                	<label>Email <span class="req">*</span></label>
           		<input type="text" class="full" name="contactEmail" id="contactEmail" value="<?php if(isset($_POST['contactEmail'])) echo $_POST['contactEmail']; ?>"/>
           		<?php if($emailError != '') { ?>
                	<div id="error_email" class="error"><?=$emailError;?></div>
                <?php } ?>
			</div>

              <div class="span8">
                <label>Message <span class="req">*</span></label>
                <textarea cols="10" rows="10" name="contactMessage" id="contactMessage" class="full"><?php if(isset($_POST['contactMessage'])) { if(function_exists('stripslashes')) { echo stripslashes($_POST['contactMessage']); } else { echo $_POST['contactMessage']; } } ?></textarea>
                <?php if($messageError != '') { ?>
                <div id="error_message" class="error"><?=$messageError; ?></div>
                <?php } ?>

                <?php if(isset($emailSent) && $emailSent == true) { ?>
            	    <div id="mail_success" class="success"> Thank you. Your message has been sent.</div>
            	<?php } else { ?>

              	<?php if(isset($hasError) || isset($captchaError)) { ?>
              		<div id="mail_failed" class="error">Error, email not sent</div>
              	<?php } ?>

		      <p id="btnsubmit">
		      <input type="hidden" name="submitted" id="submitted" value="true" />
		      <input type="submit" id="send" value="Send Now" class="btn btn-large"/>
		      </p>     

              </div>

                    <?php } ?>
              </form>

            </div>

              	</div>
          <?php endwhile; endif; ?>   

                <?php get_sidebar('contactpage'); ?>

             </div>
         </div>
    </div>

 <?php get_footer(); ?>

saat saya setting TRUE wp_debug di file wp-config.php , ada ” Notice: Undefined variable: nameError in /var/www/grazie/wp-content/themes/canohost/template-contact.php on line 85 “

” Notice: Undefined variable: emailError in /var/www/grazie/wp-content/themes/canohost/template-contact.php on line 93 “

” Notice: Undefined variable: messageError in /var/www/grazie/wp-content/themes/canohost/template-contact.php on line 101 “

mohon bantuannya, atau ada yang punya link dalam pembuatan form kontak di wordpress. terima kasih sebelumnya 🙂