Contact form issues wordpress - php

Question

I've got a problem with a contact form on my webpage.
When someone fills it in, i always got the error message that something isn't filled in right.
It seems to be the telephone number.
The link to the webpage is http://www.tiggelovend-kok.nl/index.php/contact/
<?php
/*
Template Name: Contact
*/
?>
<?php get_header(); ?>
<div class="wider_blog">
<div class="_blog">
<div class="topbar"><div class="row">
<?php
echo beopen_main_title();
if (beopen_get_option('show_breadcrumbs') == '2') {
echo beopen_breadcrumb();
}
?>
</div></div>
<?php
if (beopen_get_option('show_map') != 1) {
?>
<div id="map_canvas_shadow"></div>
<div id="map_canvas"></div>
<?php
}
?>
<div class="row">
<!-- Row for main content area -->
<div id="content" class="eight columns rightfade" role="main">
<div class="post-box">
<article class="contact">
<?php while (have_posts()) : the_post(); ?>
<?php the_content(); ?>
<?php endwhile; ?>
<?php if (beopen_get_option('show_contact_form') == 2) { ?>
<?php echo beopen_get_option('contact_form_text'); ?>
<form class="beopen-contact-form" action="<?php echo get_permalink(); ?>" method="post">
<?php
require_once(THEME_LIBRARY . '/recaptchalib.php');
$error_contact_name = '';
$error_contact_email = '';
$error_contact_phone = '';
$error_contact_company = '';
$error_contact_message = '';
$contact_name = '';
$contact_email = '';
$contact_company = '';
$contact_phone = '';
$contact_message = '';
$publickey = beopen_get_option('recaptcha_public_key');
$privatekey = beopen_get_option('recaptcha_private_key');
if (isset($_POST['beopen_form'])) {
foreach ($_POST as $key => $val) {
$GLOBALS[$key] = wp_filter_kses($val);
}
$send = 0;
if (beopen_get_option('show_recaptcha') == 2) {
$recaptcha_challenge_field = '';
if (isset($_POST["recaptcha_challenge_field"])) {
$recaptcha_challenge_field = $_POST["recaptcha_challenge_field"];
}
$recaptcha_response_field = '';
if (isset($_POST["recaptcha_response_field"])) {
$recaptcha_response_field = $_POST["recaptcha_response_field"];
}
$resp = recaptcha_check_answer($privatekey, $_SERVER["REMOTE_ADDR"], $recaptcha_challenge_field, $recaptcha_response_field);
if (!$resp->is_valid) {
// What happens when the CAPTCHA was entered incorrectly
echo '<div class="alert-box alert">';
echo (__("The reCAPTCHA wasn't entered correctly. Go back and try it again.", 'beopen') .
"(" . __('reCAPTCHA said:', 'beopen') . " " . $resp->error . ")");
echo '</div>';
} else {
// Your code here to handle a successful verification
$send = 1;
}
} else {
$send = 1;
}
if (!(isset($_POST['contact_name']) && ($_POST['contact_name']) != '')) {
$error_contact_name = 'error';
$send = 2;
}
if (!(isset($_POST['contact_message']) && ($_POST['contact_message']) != '')) {
$error_contact_message = 'error';
$send = 2;
}
if ($send == 2) {
echo '<div class="alert-box alert">';
_e('U bent een veld vergeten in te vullen!', 'beopen');
echo '</div>';
} else
if ($send == 1) {
$mail_content = __('Name:', 'beopen') . PHP_EOL . $_POST['contact_name'] . PHP_EOL . PHP_EOL .
__('E-mail:', 'beopen') . PHP_EOL . $_POST['contact_email'] . PHP_EOL . PHP_EOL .
__('Company:', 'beopen') . PHP_EOL . $_POST['contact_company'] . PHP_EOL . PHP_EOL .
__('Phone:', 'beopen') . PHP_EOL . $_POST['contact_phone'] . PHP_EOL . PHP_EOL .
__('Message:', 'beopen') . PHP_EOL . $_POST['contact_message'] . PHP_EOL;
if ($_POST['contact_email'] == '') {
$mail_headers = 'From: ' . beopen_get_option('contact_email_from') . PHP_EOL .
'Reply-To: ' . beopen_get_option('contact_email_from');
} else {
$mail_headers = 'From: ' . $_POST['contact_email'] . PHP_EOL .
'Reply-To: ' . $_POST['contact_email'];
}
if (mail(beopen_get_option('contact_email_to'), beopen_get_option('contact_email_subject'), $mail_content, $mail_headers)) {
echo '<div class="alert-box success">';
_e('Bericht verzonden!', 'beopen');
echo '</div>';
} else {
echo '<div class="alert-box alert">';
_e('Voer de juiste gegevens in!', 'beopen');
echo '</div>';
}
}
}
?>
<div class="row">
<div class="six columns">
<div class="beopen-wrap author-icon <?php echo $error_contact_name; ?>">
<input type="text" name="contact_name" value="<?php echo $contact_name; ?>" placeholder="<?php _e('Uw naam', 'beopen'); ?>" />
</div>
</div>
<div class="six columns">
<div class="beopen-wrap email-icon <?php echo $error_contact_email; ?>">
<input type="text" name="contact_email" value="<?php echo $contact_email; ?>" placeholder="<?php _e('Uw e-mail', 'beopen'); ?>" />
</div>
</div>
</div>
<div class="row">
<div class="six columns">
<div class="beopen-wrap company-icon <?php echo $error_contact_company; ?>">
<input type="text" name="contact_company" value="<?php echo $contact_company; ?>" placeholder="<?php _e('Uw organisatie', 'beopen'); ?>" />
</div>
</div>
<div class="six columns">
<div class="beopen-wrap phone-icon <?php echo $error_contact_phone; ?>">
<input type="text" name="contact_phone" value="<?php echo $contact_phone; ?>" placeholder="<?php _e('Uw telefoonnummer', 'beopen'); ?>" />
</div>
</div>
</div>
<textarea name="contact_message" placeholder="<?php _e('Voer hier uw bericht in', 'beopen'); ?>" <?php if ($error_contact_message) { echo 'class="' . $error_contact_message . '"'; } ?>><?php echo $contact_message; ?></textarea>
<div id="recaptcha_div"></div>
<input type="hidden" name="beopen_form" value="1" />
<button class="button send-message" type="submit"><span class="send-message"></span><?php _e('Verzenden', 'beopen'); ?></button>
</form>
<?php } ?>
</article>
</div>
</div><!-- End Content row -->
<div class="four columns">
<div class="contact-sidebar">
<?php echo wpautop(beopen_get_option('map_address')); ?>
</div>
</div>
</div>
</div>
</div>
<?php get_footer(); ?>