php to javascript

    <?php if ( is_singular('event') ) {
        $first_name     = get_user_meta( $user_ID, 'first_name' );
        $last_name      = get_user_meta( $user_ID, 'last_name' );
        $current_user   = wp_get_current_user();
        $email          = $current_user->user_email;
    ?>
        <script type="text/javascript">
            // jQuery( document ).ready(function( $ ) {
            $(document).ready(function() {

                // hide paypal payment option from dropdown
                $("option[value=\'paypal\']").remove();

                // prefill guest form
                $('#first_name').val(<?php echo $first_name; ?>);
                $('#last_name').val(<?php echo $last_name; ?>);
                $('#user_email').val(<?php echo $email; ?>);

            });
        </script>
    <?php } ?>