Paid Memberships Pro - Move custom Field to Billing

pmpro-move-company-bililng.php

<?php
/**
 * Move custom date field above address 1 line.
 */
function pmpro_move_custom_to_billing() {
	if ( is_page( 'membership-checkout' ) && wp_script_is( 'jquery', 'done' ) ) {
		?>
		<script>
			jQuery( '#date_of_birth_div' ).prependTo( '.pmpro_checkout-field-baddress1' );
		</script>
		<?php
	}
}
add_action( 'wp_footer', 'pmpro_move_custom_to_billing' );