WordPress ShortCode for Embedding HubSpot Forms

hubspot_form

<?php 

    // Usage: [hubspot_form form_id="1234-5678-90123-45676"]
    // Inspiration: https://rschu.me/an-easy-way-to-embed-hubspot-forms-in-wordpress/
    // API Documentation: http://developers.hubspot.com/docs/methods/forms/advanced_form_options

    add_shortcode('hubspot_form', function($atts) {
        extract(shortcode_atts(array(
            'form_id'      => null,
            'redirect_url' => null
        ), $atts));

        if( !is_null($form_id) ) {
            $post_id = get_the_ID();
            $hubspot_form = array(
                                'portalId'          => '1234567',
                                'formId'            => $form_id,
                                'target'            => '#joecode-'.$post_id,
                                'inlineMessage'     => 'Thank you for contacting us, we will be in touch.'
                            );

            if( !is_null($redirect_url) ) {
                $hubspot_form['redirectUrl'] = $redirect_url;
            }
            
            $html_form = '<div id="joecode-'.$post_id.'"></div>';
            $html_form .= '<script>hbspt.forms.create( ' . json_encode( $hubspot_form ) . ' );</script>';

            return $html_form;
        }
    });
?>