Phone number field and OTP field to your form

<?php
/**
 * Abstract Form
 *
 * @package    wp-job-board-pro
 * @author     Habq 
 * @license    GNU General Public License, version 3
 */

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

class WP_Job_Board_Pro_Abstract_Register_Form {
    public $form_name = '';
    public $post_type = '';
    public $prefix = '';
    public $errors = array();
    public $success_msg = array();

    public function __construct() {
        add_filter( 'cmb2_meta_boxes', array( $this, 'fields_front' ) );
        add_action( 'wp_ajax_send_otp', array( $this, 'send_otp' ) );
        add_action( 'wp_ajax_nopriv_send_otp', array( $this, 'send_otp' ) );
        add_action( 'wp_ajax_verify_otp', array( $this, 'verify_otp' ) );
        add_action( 'wp_ajax_nopriv_verify_otp', array( $this, 'verify_otp' ) );
    }
    
    public function get_form_action() {
        return '//' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
    }

    public function get_form_name() {
        return $this->form_name;
    }

    public function add_error( $error ) {
        $this->errors[] = $error;
    }
    
    public function fields_front($metaboxes) {

        $fields = apply_filters( 'wp-job-board-pro-register-'.$this->post_type.'-fields', array(
            array(
                'id'                => 'post_type',
                'type'              => 'hidden',
                'default'           => $this->post_type,
                'priority'          => 0,
            ),
            array(
                'name'              => __( 'Email', 'wp-job-board-pro' ),
                'id'                => $this->prefix . 'email',
                'type'              => 'text',
                'priority'          => 0,
                'label_cb'          => array( 'WP_Job_Board_Pro_Mixes', 'required_add_label' ),
                'attributes' => array(
                    'placeholder' => esc_html__('Email', 'wp-job-board-pro'),
                    'required' => true
                )
            ),
            array(
                'name'              => __( 'Phone Number', 'wp-job-board-pro' ),
                'id'                => $this->prefix . 'phone',
                'type'              => 'text',
                'priority'          => 0,
                'label_cb'          => array( 'WP_Job_Board_Pro_Mixes', 'required_add_label' ),
                'attributes' => array(
                    'placeholder' => esc_html__('Phone Number', 'wp-job-board-pro'),
                    'required' => true
                )
            ),
            array(
                'name'              => __( 'OTP', 'wp-job-board-pro' ),
                'id'                => $this->prefix . 'otp',
                'type'              => 'text',
                'priority'          => 0,
                'attributes' => array(
                    'placeholder' => esc_html__('Enter OTP', 'wp-job-board-pro'),
                    'required' => true
                )
            ),
            array(
                'name'              => __( 'Password', 'wp-job-board-pro' ),
                'id'                => $this->prefix . 'password',
                'type'              => 'hide_show_password',
                'priority'          => 0,
                'label_cb'          => array( 'WP_Job_Board_Pro_Mixes', 'required_add_label' ),
                'attributes' => array(
                    'placeholder' => esc_html__('Password', 'wp-job-board-pro'),
                    'required' => true
                )
            ),
            array(
                'name'              => __( 'Confirm Password', 'wp-job-board-pro' ),
                'id'                => $this->prefix . 'confirmpassword',
                'type'              => 'hide_show_password',
                'priority'          => 0,
                'label_cb'          => array( 'WP_Job_Board_Pro_Mixes', 'required_add_label' ),
                'attributes' => array(
                    'placeholder' => esc_html__('Confirm Password', 'wp-job-board-pro'),
                    'required' => true
                )
            ),
        ), $this->post_type, $this->prefix );

        $metaboxes[ $this->prefix . 'register_fields' ] = array(
            'id'                        => $this->prefix . 'register_fields',
            'title'                     => __( 'General Options', 'wp-job-board-pro' ),
            'object_types'              => array( $this->post_type ),
            'context'                   => 'normal',
            'priority'                  => 'high',
            'show_names'                => true,
            'fields'                    => $fields
        );

        return $metaboxes;
    }

    public function form_output() {
        $metaboxes = apply_filters( 'cmb2_meta_boxes', array() );
        if ( ! isset( $metaboxes[ $this->prefix . 'register_fields' ] ) ) {
            return __( 'A metabox with the specified \'metabox_id\' doesn\'t exist.', 'wp-job-board-pro' );
        }
        $metaboxes_form = $metaboxes[ $this->prefix . 'register_fields' ];

        wp_enqueue_script('wpjbp-select2');
        wp_enqueue_style('wpjbp-select2');

        return WP_Job_Board_Pro_Template_Loader::get_template_part( 'misc/register-'.$this->post_type, array(
            'post_id' => WP_Job_Board_Pro_Mixes::random_key(),
            'metaboxes_form' => $metaboxes_form,
            'form_obj'       => $this,
            'submit_button_text' => apply_filters( 'wp_job_board_pro_register_'.$this->post_type.'_form_submit_button_text', __( 'Register now', 'wp-job-board-pro' ) ),
        ) );
    }

    public function send_otp() {
        // Use Twilio to send OTP
        require_once 'vendor/autoload.php'; // Path to Twilio autoload.php
        $sid = 'YOUR_TWILIO_SID';
        $token = 'YOUR_TWILIO_AUTH_TOKEN';
        $twilio = new \Twilio\Rest\Client($sid, $token);

        $phone = sanitize_text_field($_POST['phone']);
        $otp = rand(100000, 999999); // Generate a random 6-digit OTP

        $message = $twilio->messages->create(
            $phone,
            array(
                'from' => 'YOUR_TWILIO_PHONE_NUMBER',
                'body' => 'Your OTP is ' . $otp
            )
        );

        // Store OTP in the session for verification later
        session_start();
        $_SESSION['otp'] = $otp;

        wp_send_json_success('OTP sent successfully.');
    }

    public function verify_otp() {
        session_start();
        $entered_otp = sanitize_text_field($_POST['otp']);

        if ($_SESSION['otp'] == $entered_otp) {
            wp_send_json_success('OTP verified successfully.');
        } else {
            wp_send_json_error('Invalid OTP.');
        }
    }
}