[FIXED] How to use do_action user_register hook in WP

Issue

I am creating a new User with wp_insert_user() function in an AJAX call. After that I need to add the phone number as custom field, so I need to use the wordpress hook user_register and I don't know how to use it.

add_action('wp_ajax_nopriv_register', 'register_user');
add_action('wp_ajax_register', 'register_user');
function registrar_cliente(){
    if(isset($_POST['dataForPHP'])){
        $phone = wp_filter_nohtml_kses($_POST['dataForPHP'][0]);
        $name =  wp_filter_nohtml_kses($_POST['dataForPHP'][1]);
        $email =  wp_filter_nohtml_kses($_POST['dataForPHP'][2]);

        $userdata = [//adding data];
        $user_id = wp_insert_user($userdata);
    }
} 

How can I use now do_action( 'user_register', int $user_id, array $userdata ) in order to insert $phone to the user in a custom field?

Solution

You can store the value of the custom field in user_meta.

add_action( 'wp_ajax_nopriv_register', 'register_user' );
add_action( 'wp_ajax_register', 'register_user' );

function register_user() {
    $phone = wp_filter_nohtml_kses( $_POST['dataForPHP'][0] );
    $name  = wp_filter_nohtml_kses( $_POST['dataForPHP'][1] );
    $email = wp_filter_nohtml_kses( $_POST['dataForPHP'][2] );

    // $userdata = [adding data];
    $user_id   = wp_insert_user( $userdata );
    $user_meta = update_user_meta( $user_id, 'phone_no', $phone );
    if ( isset( $user_id ) ) {
        echo 'User registered';
    }
}

Code for adding extra fields in Edit User Section:

add_action( 'show_user_profile', 'extra_user_profile_fields' );
add_action( 'edit_user_profile', 'extra_user_profile_fields' );

function extra_user_profile_fields( $user ) {
    ?>
        <h3><?php _e( 'Extra profile information', 'blank' ); ?></h3>

        <table class="form-table">
            <tr>
                <th><label for="phone_no"><?php _e( 'Phone Number' ); ?></label></th>
                <td>
                    <input type="text" name="phone_no" id="phone_no"
                        value="<?php echo esc_attr( get_user_meta( $user->ID, 'phone_no', true ) ); ?>"
                        class="regular-text" /><br />
                    <span class="description"><?php _e( 'Please enter your phone number.' ); ?></span>
                </td>
            </tr>
        </table>
    <?php
}

Code for saving extra fields details in the database from the edit screen(If you want to change value from edit screen):

add_action( 'personal_options_update', 'save_extra_user_profile_fields' );
add_action( 'edit_user_profile_update', 'save_extra_user_profile_fields' );

function save_extra_user_profile_fields( $user_id ) {

    update_user_meta( $user_id, 'phone_no', $_POST['phone_no'] );

}

Answered By - Krunal Bhimajiyani

Answer Checked By - Pedro (PHPFixing Volunteer)