Add first and last name fields to the user registration form #hivepress #users

functions.php

<?php
add_filter(
	'hivepress/v1/forms/user_register',
	function ( $form ) {
		$form['fields'] = array_merge(
			$form['fields'],
			[
				'first_name' => [
					'required' => true,
					'_order'   => 1,
				],

				'last_name'  => [
					'required' => true,
					'_order'   => 2,
				],
			]
		);

		return $form;
	},
	100
);

add_action(
	'hivepress/v1/models/user/register',
	function( $user_id, $values ) {
		if ( isset( $values['first_name'] ) ) {
			update_user_meta( $user_id, 'first_name', $values['first_name'] );
		}

		if ( isset( $values['last_name'] ) ) {
			update_user_meta( $user_id, 'last_name', $values['last_name'] );
		}
	},
	10,
	2
);


		

is it possible to add other fields like birth date or phone number with this snippet?

It's possible, but further customizations would be required to validate, save and display the field values somewhere. It's possible without customizations already, but for vendors only (by adding attributes in Vendors/Attributes section).