LRM :: save custom fields

lrm-save-custom-fields-wc-example.php

<?php

// How to add html: https://monosnap.com/file/2MVkjClgYE3W3U9cgPEjy4VXXCzXf2
// COPY AFTER

$lrm_fields = [ 'billing_city'=>'City', 'billing_state'=>'State', 'billing_postcode' => 'Postcode', 'ETC'=>'ETC' ];

add_filter( 'registration_errors',function ( $errors, $sanitized_user_login, $user_email ) use($lrm_fields) {
    foreach( $lrm_fields as $lrm_field=>$lrm_field_label ) {
          if ( empty( $_POST[$lrm_field ] ) ) {
            $errors->add( $lrm_field .'_error', '<strong>ERROR</strong>: Please enter your ' . $lrm_field_label . '.' );
          }
    }
       
    return $errors;
}, 10, 3 );

add_action( 'user_register', function ( $user_id ) use($lrm_fields) {
  foreach( $lrm_fields as $lrm_field=>$lrm_field_label ) {
    if ( ! empty( $_POST[$lrm_field] ) ) {
        update_user_meta( $user_id, $lrm_field, sanitize_text_field($_POST[$lrm_field] ) );
    }
  }
});

lrm-save-custom-fields.php

<?php

// How to add html: https://monosnap.com/file/2MVkjClgYE3W3U9cgPEjy4VXXCzXf2
// COPY AFTER

$lrm_fields = [ 'phone'=>'Phone', 'address'=>'Address' ];

add_filter( 'registration_errors',function ( $errors, $sanitized_user_login, $user_email ) use($lrm_fields) {
    foreach( $lrm_fields as $lrm_field=>$lrm_field_label ) {
          if ( empty( $_POST[$lrm_field ] ) ) {
            $errors->add( $lrm_field .'_error', '<strong>ERROR</strong>: Please enter your ' . $lrm_field_label . '.' );
          }
    }
       
    return $errors;
}, 10, 3 );

add_action( 'user_register', function ( $user_id ) use($lrm_fields) {
  foreach( $lrm_fields as $lrm_field=>$lrm_field_label ) {
    if ( ! empty( $_POST[$lrm_field] ) ) {
        update_user_meta( $user_id, $lrm_field, sanitize_text_field($_POST[$lrm_field] ) );
    }
  }
});

How to send custom fields as an email to user and admin?