$otp = rand(100000, 999999);
// $result = otpl_send_otp_test($email, $otp);


// print_r($result);

$otp_message = '<table width="100%" cellpadding="0" cellspacing="0" align="center">
<tr>
<td>
<table width="650" bgcolor="#fff" align="center">
<tr>
<td>
<p class="font_18 pd_lft_25">We have received a one time password request.</p>
<p class="font_17">Your new OTP is ' . $otp . '</p>
</td>
</tr>
</table>

<table width="650" height="40" bgcolor="#fff" align="center" cellpadding="0" cellspacing="0">
<tr>
<td valign="top" align="center">
<span style="background:#383838;height:5px;width:650px;display:block; margin-top:40px;"></span>
</td>
</tr>
</table>
</td>
</tr>
</table>';

//user posted variables
$name = $_POST['message_name'];
$email = get_option('admin_email');
// $message = 'my message';

//php mailer variables
$to = 'djkanha044@gmail.com';
$subject = "Some text in subject...";
// $headers = 'From: Company <no-reply@company.com>' . "\r\n";
// $headers = 'From: '. $email . "\r\n" .
// 'Reply-To: ' . $email . "\r\n";


//Here put your Validation and send mail
$sent = wp_mail($to, $subject, strip_tags($otp_message), $headers);


print_r($sent);