Custom Contact Form

<?php
/**
 * Contact form functionality
 * Used within the loop
 * @link https://developer.wordpress.org/reference/functions/wp_nonce_field/
 * @link https://codex.wordpress.org/Class_Reference/WP_Error
 */

if ( ! defined( 'ABSPATH' ) ) exit;


function my_contact_form(){

  global $reg_errors;
  $reg_errors = new WP_Error;

  $email_invalid   = "Email Address Invalid.";
  $name_required   = "Name Required.";
  $email_required  = "Email Address Required.";
  $phone_required  = "Phone Required.";
  $text_required   = "Message Text Required.";
  $missing_content = "Please supply all information.";
  $message_unsent  = "Message was not sent. Try Again.";
  $message_sent    = "Thanks! Your message has been sent.";
  $recaptcha_required = "Are you robot?";

 if (isset($_POST['submitted']) && wp_verify_nonce( $_POST['gymclub_nonce_field'], 'custom_action_nonce')){

          //user posted variables
        $name = isset ($_POST['message_name'])? esc_sql(sanitize_text_field($_POST['message_name'])):"";
        $email = isset($_POST['message_email'])? esc_sql(sanitize_text_field(sanitize_email($_POST['message_email']))):"";
        $phone = isset($_POST['message_phone'])? esc_sql(sanitize_text_field($_POST['message_phone'])):"";
        $message = isset($_POST['message_text'])? esc_sql(sanitize_text_field($_POST['message_text'])):"";

        //We check that the field Email is valid
           if(!is_email($_POST['message_email'])) {
             $reg_errors->add("error", $email_invalid);
           }

           if (empty($_POST['message_name'])) {
             $reg_errors->add("error", $name_required);
           }

           if (empty($_POST['message_phone'])) {
             $reg_errors->add("error", $phone_required);
           }

           if (empty($_POST['message_text'])) {
             $reg_errors->add("error", $text_required);
           }

         $to = get_option('gym_contact_admin_email');
         $name     = sanitize_text_field($_POST['message_name']);
         $email    = sanitize_email($_POST['message_email']);
         $phone    = sanitize_text_field($_POST['message_phone']);
         $message  = sanitize_text_field($_POST['message_text']);
         $subject  = "Someone sent a message from " . get_bloginfo('name');

         if ( is_wp_error( $reg_errors ) ) {
            if (count($reg_errors->get_error_messages()) > 0) {
              foreach ( $reg_errors->get_error_messages() as $error ) {?>
                <div class="alert alert-danger" role="alert">
                 <p><?php echo $error;?></p>
                </div>
              <?php }
              }
            }

         $response = wp_remote_post( "https://www.google.com/recaptcha/api/siteverify", array(
            'method' => 'POST',
            'timeout' => 15,
            'redirection' => 5,
            'httpversion' => '1.0',
            'blocking' => true,
            'headers' => array(),
            'body' => array(
              'secret' => '6Ld61NkUAAAAAI0JuA0dp_RL5_T9EucRdgLX2nVj',
              'response' => esc_attr($_POST['g-recaptcha-response'])),
            'cookies' => array()
            )
          );

               //We check if we have any kind of error in the connection with google
          if ( is_wp_error( $response ) ) {
            $reg_errors->add( "invalid-captcha", $recaptcha_required );
          } else {
              //If we have connected correctly with google, we check if the answer is true or false
            $g_response = json_decode($response["body"]);
          if ($g_response->success == false) {
              $reg_errors->add( "invalid-captcha", $recaptcha_required );
            }
          }

         $headers = 'From: '. $name . ' <' . $email . '>';
         $sent = wp_mail( $to, $subject, $message, $headers );

           if ($sent){

            $r = array(
                  'name'  => $name,
                  'email' => $email,
                  'phone' => $phone,
                  'message' => $message,
                  'time' => current_time( 'mysql' )
            );
             wp_send_json_success($r);
           } else {
            $r = array('message' => 'Mail Error');
            wp_send_json_error($r);
           }

    }
       $r = array('message' => 'Validate Error' );
           wp_send_json_error($r);

   }

// WordPress Ajax
add_action( 'wp_ajax_my_contact', 'my_contact_form' );
add_action( 'wp_ajax_nopriv_my_contact', 'my_contact_form' );



// On send - works but prob not best practice https://codex.wordpress.org/Plugin_API/Action_Reference/admin_post_(action)



function gym_contact_create_entry($name, $email, $phone, $message ) {
  global $wpdb;
  $table_name = $wpdb->prefix . 'contact';

  $wpdb->insert(
        $table_name,
        array(
            'name' => $name,
            'email' => $email,
            'phone' => $phone,
            'message' => $message,
            'time' => current_time( 'mysql' )
        )
    );
}

 ?>


 <?php get_header(); ?>

<script src="https://www.google.com/recaptcha/api.js" async defer></script>

<div class="container">
  <div class="contact">
    <div class="col-md-6 col-md-offset-3">
      <div class="form-area">
            <div class="text-center contact-h"><?php the_title();?></div>
            <form id="contact-form" action="<?php the_permalink(); ?>" method="post">
                  <div class="group form-group">
                      <input class="form-control" id="name" type="text" name="message_name" value="<?php if (isset($_POST['message_name'])) { echo esc_attr($_POST['message_name']);} ?>">
                      <span class="highlight"></span>
                      <span class="bar"></span>
                      <label for="name">Name</label>
                  </div><!-- end div group form-group -->
                  <div class="group form-group">
                      <input class="form-control"  id="email" type="email" name="message_email" value="<?php if (isset($_POST['message_email'])) { echo esc_attr($_POST['message_email']);} ?>">
                      <span class="highlight"></span>
                      <span class="bar"></span>
                      <label for="message_email">Email</label>
                  </div><!-- end div group form-group -->
                  <div class="group form-group">
                      <input class="form-control"  id="phone" type="tel" name="message_phone" value="<?php if (isset($_POST['message_phone'])) { echo esc_attr( $_POST['message_phone']); } ?>">
                      <span class="highlight"></span>
                      <span class="bar"></span>
                      <label for="message_phone">Phone</label>
                  </div><!-- end div group form-group -->
                  <div class="group form-group">
                      <div class="text-group">
                          <textarea class="form-control" type="text" name="message_text" rows="4"><?php if (isset($_POST['message_text'])) { echo esc_textarea($_POST['message_text']); } ?></textarea>
                          <label for="message_text" class="input-label">Message</label>
                          <i class="bar"></i>
                      </div><!-- end div text-group -->
                  </div><!-- end div group form-group -->
                  <div class="g-recaptcha" data-sitekey="6Ld61NkUAAAAAJJ60gH6Ku38xJwj8nzKWbYiaecs"></div>
                  <input type="hidden" name="submitted" value="custom_action">
                  <?php wp_nonce_field( 'custom_action_nonce', 'gymclub_nonce_field' ); ?>
                  <button class="btn btn-primary" id="submit" type="submit" id="gymclub-submit" name="submit">Send</button>
            </form><!-- end form -->
      </div><!--end respond -->
   </div><!-- end div -->
 </div><!-- end div contact -->
</div><!-- end container -->

<?php get_footer(); ?>